CVE-2026-33228 (GCVE-0-2026-33228)

Vulnerability from cvelistv5 – Published: 2026-03-20 23:06 – Updated: 2026-06-29 12:34
VLAI
Title
flatted: Prototype Pollution via parse()
Summary
flatted is a circular JSON parser. Prior to version 3.4.2, the parse() function in flatted can use attacker-controlled string values from the parsed JSON as direct array index keys, without validating that they are numeric. Since the internal input buffer is a JavaScript Array, accessing it with the key "__proto__" returns Array.prototype via the inherited getter. This object is then treated as a legitimate parsed value and assigned as a property of the output object, effectively leaking a live reference to Array.prototype to the consumer. Any code that subsequently writes to that property will pollute the global prototype. This issue has been patched in version 3.4.2.
Severity
8.9 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: poc Automatable: yes Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-1321 - Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
  • CWE-915 - Improperly Controlled Modification of Dynamically-Determined Object Attributes
Assigner
References
Impacted products
Vendor Product Version
WebReflection flatted Affected: < 3.4.2
Create a notification for this product.
Red Hat Red Hat Developer Hub 1.8     cpe:/a:redhat:rhdh:1.8::el9
 Create a notification for this product.
Red Hat Red Hat Developer Hub 1.9     cpe:/a:redhat:rhdh:1.9::el9
 Create a notification for this product.
Red Hat Red Hat 3scale API Management Platform 2     cpe:/a:redhat:red_hat_3scale_amp:2
 Create a notification for this product.
Red Hat Red Hat Build of Keycloak     cpe:/a:redhat:build_keycloak:
 Create a notification for this product.
Red Hat Red Hat Single Sign-On 7     cpe:/a:redhat:red_hat_single_sign_on:7
 Create a notification for this product.
Red Hat Cryostat 4     cpe:/a:redhat:cryostat:4
 Create a notification for this product.
Red Hat Logging Subsystem for Red Hat OpenShift     cpe:/a:redhat:logging:5
 Create a notification for this product.
Red Hat Multicluster Engine for Kubernetes     cpe:/a:redhat:multicluster_engine
 Create a notification for this product.
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2     cpe:/a:redhat:acm:2
 Create a notification for this product.
Red Hat Red Hat AMQ Broker 7     cpe:/a:redhat:amq_broker:7
 Create a notification for this product.
Red Hat Red Hat build of Apicurio Registry 2     cpe:/a:redhat:service_registry:2
 Create a notification for this product.
Red Hat Red Hat build of OptaPlanner 8     cpe:/a:redhat:optaplanner:::el6
 Create a notification for this product.
Red Hat Red Hat Build of Podman Desktop     cpe:/a:redhat:podman_desktop:1
 Create a notification for this product.
Red Hat Red Hat Data Grid 8     cpe:/a:redhat:jboss_data_grid:8
 Create a notification for this product.
Red Hat Red Hat Directory Server 11     cpe:/a:redhat:directory_server:11
 Create a notification for this product.
Red Hat Red Hat Directory Server 12     cpe:/a:redhat:directory_server:12
 Create a notification for this product.
Red Hat Red Hat Directory Server 13     cpe:/a:redhat:directory_server:13
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 10     cpe:/o:redhat:enterprise_linux:10
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8     cpe:/o:redhat:enterprise_linux:8
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 9     cpe:/o:redhat:enterprise_linux:9
 Create a notification for this product.
Red Hat Red Hat Fuse 7     cpe:/a:redhat:jboss_fuse:7
 Create a notification for this product.
Red Hat Red Hat JBoss Enterprise Application Platform 7     cpe:/a:redhat:jboss_enterprise_application_platform:7
 Create a notification for this product.
Red Hat Red Hat JBoss Enterprise Application Platform 8     cpe:/a:redhat:jboss_enterprise_application_platform:8
 Create a notification for this product.
Red Hat Red Hat JBoss Enterprise Application Platform Expansion Pack     cpe:/a:redhat:jbosseapxp
 Create a notification for this product.
Red Hat Red Hat OpenShift AI (RHOAI)     cpe:/a:redhat:openshift_ai
 Create a notification for this product.
Red Hat Red Hat OpenShift Container Platform 4     cpe:/a:redhat:openshift:4
 Create a notification for this product.
Red Hat Red Hat Process Automation 7     cpe:/a:redhat:jboss_enterprise_bpms_platform:7
 Create a notification for this product.
Red Hat Red Hat Quay 3     cpe:/a:redhat:quay:3
 Create a notification for this product.
Red Hat streams for Apache Kafka 2     cpe:/a:redhat:amq_streams:2
 Create a notification for this product.
Red Hat streams for Apache Kafka 3     cpe:/a:redhat:amq_streams:3
 Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-33228",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-03-24T17:35:34.197834Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-03-24T17:57:22.866Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "affected": [
          {
            "cpes": [
              "cpe:/a:redhat:rhdh:1.8::el9"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Developer Hub 1.8",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:rhdh:1.9::el9"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Developer Hub 1.9",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:red_hat_3scale_amp:2"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat 3scale API Management Platform 2",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:build_keycloak:"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Build of Keycloak",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:red_hat_single_sign_on:7"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Single Sign-On 7",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:cryostat:4"
            ],
            "defaultStatus": "unaffected",
            "product": "Cryostat 4",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:logging:5"
            ],
            "defaultStatus": "unaffected",
            "product": "Logging Subsystem for Red Hat OpenShift",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:multicluster_engine"
            ],
            "defaultStatus": "unaffected",
            "product": "Multicluster Engine for Kubernetes",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:acm:2"
            ],
            "defaultStatus": "unaffected",
            "product": "Red Hat Advanced Cluster Management for Kubernetes 2",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:amq_broker:7"
            ],
            "defaultStatus": "unaffected",
            "product": "Red Hat AMQ Broker 7",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:service_registry:2"
            ],
            "defaultStatus": "unaffected",
            "product": "Red Hat build of Apicurio Registry 2",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:optaplanner:::el6"
            ],
            "defaultStatus": "unaffected",
            "product": "Red Hat build of OptaPlanner 8",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:podman_desktop:1"
            ],
            "defaultStatus": "unaffected",
            "product": "Red Hat Build of Podman Desktop",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:jboss_data_grid:8"
            ],
            "defaultStatus": "unaffected",
            "product": "Red Hat Data Grid 8",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:directory_server:11"
            ],
            "defaultStatus": "unaffected",
            "product": "Red Hat Directory Server 11",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:directory_server:12"
            ],
            "defaultStatus": "unaffected",
            "product": "Red Hat Directory Server 12",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:directory_server:13"
            ],
            "defaultStatus": "unaffected",
            "product": "Red Hat Directory Server 13",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/o:redhat:enterprise_linux:10"
            ],
            "defaultStatus": "unaffected",
            "product": "Red Hat Enterprise Linux 10",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/o:redhat:enterprise_linux:8"
            ],
            "defaultStatus": "unaffected",
            "product": "Red Hat Enterprise Linux 8",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/o:redhat:enterprise_linux:9"
            ],
            "defaultStatus": "unaffected",
            "product": "Red Hat Enterprise Linux 9",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:jboss_fuse:7"
            ],
            "defaultStatus": "unaffected",
            "product": "Red Hat Fuse 7",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:jboss_enterprise_application_platform:7"
            ],
            "defaultStatus": "unaffected",
            "product": "Red Hat JBoss Enterprise Application Platform 7",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:jboss_enterprise_application_platform:8"
            ],
            "defaultStatus": "unaffected",
            "product": "Red Hat JBoss Enterprise Application Platform 8",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:jbosseapxp"
            ],
            "defaultStatus": "unaffected",
            "product": "Red Hat JBoss Enterprise Application Platform Expansion Pack",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:openshift_ai"
            ],
            "defaultStatus": "unaffected",
            "product": "Red Hat OpenShift AI (RHOAI)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:openshift:4"
            ],
            "defaultStatus": "unaffected",
            "product": "Red Hat OpenShift Container Platform 4",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:jboss_enterprise_bpms_platform:7"
            ],
            "defaultStatus": "unaffected",
            "product": "Red Hat Process Automation 7",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:quay:3"
            ],
            "defaultStatus": "unaffected",
            "product": "Red Hat Quay 3",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:amq_streams:2"
            ],
            "defaultStatus": "unaffected",
            "product": "streams for Apache Kafka 2",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:amq_streams:3"
            ],
            "defaultStatus": "unaffected",
            "product": "streams for Apache Kafka 3",
            "vendor": "Red Hat"
          }
        ],
        "datePublic": "2026-03-20T23:06:48.485Z",
        "descriptions": [
          {
            "lang": "en",
            "value": "A flaw was found in flatted, a JavaScript Object Notation (JSON) parser designed for handling circular data structures. A remote attacker can exploit this vulnerability by providing specially crafted JSON input. The parse() function in flatted fails to properly validate string values used as array index keys, allowing an attacker to manipulate internal JavaScript object prototypes. This prototype pollution can enable an attacker to execute arbitrary code or cause a denial of service, impacting the availability and integrity of affected systems."
          }
        ],
        "metrics": [
          {
            "other": {
              "content": {
                "namespace": "https://access.redhat.com/security/updates/classification/",
                "value": "Critical"
              },
              "type": "Red Hat severity rating"
            }
          },
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 9.8,
              "baseSeverity": "CRITICAL",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
              "version": "3.1"
            },
            "format": "CVSS"
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-915",
                "description": "Improperly Controlled Modification of Dynamically-Determined Object Attributes",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-06-29T12:34:17.953Z",
          "orgId": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
          "shortName": "redhat-SADP"
        },
        "references": [
          {
            "tags": [
              "vdb-entry",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/security/cve/CVE-2026-33228"
          },
          {
            "name": "RHBZ#2449872",
            "tags": [
              "issue-tracking",
              "x_refsource_REDHAT"
            ],
            "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2449872"
          },
          {
            "tags": [
              "x_sadp-csaf-vex"
            ],
            "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-33228.json"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:9742"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:13826"
          }
        ],
        "solutions": [
          {
            "lang": "en",
            "value": "RHSA-2026:9742: Red Hat Developer Hub 1.8"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:13826: Red Hat Developer Hub 1.9"
          }
        ],
        "timeline": [
          {
            "lang": "en",
            "time": "2026-03-21T00:01:43.424Z",
            "value": "Reported to Red Hat."
          },
          {
            "lang": "en",
            "time": "2026-03-20T23:06:48.485Z",
            "value": "Made public."
          }
        ],
        "title": "flatted: Flatted: Prototype pollution vulnerability allows arbitrary code execution via crafted JSON.",
        "x_adpType": "supplier",
        "x_generator": {
          "engine": "sadp-cli 1.0.0"
        }
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "flatted",
          "vendor": "WebReflection",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 3.4.2"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "flatted is a circular JSON parser. Prior to version 3.4.2, the parse() function in flatted can use attacker-controlled string values from the parsed JSON as direct array index keys, without validating that they are numeric. Since the internal input buffer is a JavaScript Array, accessing it with the key \"__proto__\" returns Array.prototype via the inherited getter. This object is then treated as a legitimate parsed value and assigned as a property of the output object, effectively leaking a live reference to Array.prototype to the consumer. Any code that subsequently writes to that property will pollute the global prototype. This issue has been patched in version 3.4.2."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 8.9,
            "baseSeverity": "HIGH",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-1321",
              "description": "CWE-1321: Improperly Controlled Modification of Object Prototype Attributes (\u0027Prototype Pollution\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-03-20T23:06:48.485Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/WebReflection/flatted/security/advisories/GHSA-rf6f-7fwh-wjgh",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/WebReflection/flatted/security/advisories/GHSA-rf6f-7fwh-wjgh"
        },
        {
          "name": "https://github.com/WebReflection/flatted/commit/885ddcc33cf9657caf38c57c7be45ae1c5272802",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/WebReflection/flatted/commit/885ddcc33cf9657caf38c57c7be45ae1c5272802"
        },
        {
          "name": "https://github.com/WebReflection/flatted/releases/tag/v3.4.2",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/WebReflection/flatted/releases/tag/v3.4.2"
        }
      ],
      "source": {
        "advisory": "GHSA-rf6f-7fwh-wjgh",
        "discovery": "UNKNOWN"
      },
      "title": "flatted: Prototype Pollution via parse()"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-33228",
    "datePublished": "2026-03-20T23:06:48.485Z",
    "dateReserved": "2026-03-18T02:42:27.507Z",
    "dateUpdated": "2026-06-29T12:34:17.953Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-33228",
      "date": "2026-07-01",
      "epss": "0.00704",
      "percentile": "0.48731"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-33228\",\"sourceIdentifier\":\"security-advisories@github.com\",\"published\":\"2026-03-20T23:16:46.510\",\"lastModified\":\"2026-06-27T05:16:43.903\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"flatted is a circular JSON parser. Prior to version 3.4.2, the parse() function in flatted can use attacker-controlled string values from the parsed JSON as direct array index keys, without validating that they are numeric. Since the internal input buffer is a JavaScript Array, accessing it with the key \\\"__proto__\\\" returns Array.prototype via the inherited getter. This object is then treated as a legitimate parsed value and assigned as a property of the output object, effectively leaking a live reference to Array.prototype to the consumer. Any code that subsequently writes to that property will pollute the global prototype. This issue has been patched in version 3.4.2.\"},{\"lang\":\"es\",\"value\":\"flatted es un analizador de JSON circular. Antes de la versi\u00f3n 3.4.2, la funci\u00f3n parse() en flatted puede usar valores de cadena controlados por el atacante del JSON analizado como claves de \u00edndice de array directas, sin validar que sean num\u00e9ricos. Dado que el b\u00fafer de entrada interno es un Array de JavaScript, acceder a \u00e9l con la clave \u0027__proto__\u0027 devuelve Array.prototype a trav\u00e9s del getter heredado. Este objeto es entonces tratado como un valor analizado leg\u00edtimo y asignado como una propiedad del objeto de salida, filtrando efectivamente una referencia en vivo a Array.prototype al consumidor. Cualquier c\u00f3digo que posteriormente escriba en esa propiedad contaminar\u00e1 el prototipo global. Este problema ha sido parcheado en la versi\u00f3n 3.4.2.\"}],\"affected\":[{\"source\":\"security-advisories@github.com\",\"affectedData\":[{\"vendor\":\"WebReflection\",\"product\":\"flatted\",\"versions\":[{\"version\":\"\u003c 3.4.2\",\"status\":\"affected\"}]}]},{\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\",\"affectedData\":[{\"vendor\":\"Red Hat\",\"product\":\"Red Hat Developer Hub 1.8\",\"defaultStatus\":\"affected\",\"cpes\":[\"cpe:/a:redhat:rhdh:1.8::el9\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat Developer Hub 1.9\",\"defaultStatus\":\"affected\",\"cpes\":[\"cpe:/a:redhat:rhdh:1.9::el9\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat 3scale API Management Platform 2\",\"defaultStatus\":\"affected\",\"cpes\":[\"cpe:/a:redhat:red_hat_3scale_amp:2\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat Build of Keycloak\",\"defaultStatus\":\"affected\",\"cpes\":[\"cpe:/a:redhat:build_keycloak:\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat Single Sign-On 7\",\"defaultStatus\":\"affected\",\"cpes\":[\"cpe:/a:redhat:red_hat_single_sign_on:7\"]},{\"vendor\":\"Red Hat\",\"product\":\"Cryostat 4\",\"defaultStatus\":\"unaffected\",\"cpes\":[\"cpe:/a:redhat:cryostat:4\"]},{\"vendor\":\"Red Hat\",\"product\":\"Logging Subsystem for Red Hat OpenShift\",\"defaultStatus\":\"unaffected\",\"cpes\":[\"cpe:/a:redhat:logging:5\"]},{\"vendor\":\"Red Hat\",\"product\":\"Multicluster Engine for Kubernetes\",\"defaultStatus\":\"unaffected\",\"cpes\":[\"cpe:/a:redhat:multicluster_engine\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat Advanced Cluster Management for Kubernetes 2\",\"defaultStatus\":\"unaffected\",\"cpes\":[\"cpe:/a:redhat:acm:2\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat AMQ Broker 7\",\"defaultStatus\":\"unaffected\",\"cpes\":[\"cpe:/a:redhat:amq_broker:7\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat build of Apicurio Registry 2\",\"defaultStatus\":\"unaffected\",\"cpes\":[\"cpe:/a:redhat:service_registry:2\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat build of OptaPlanner 8\",\"defaultStatus\":\"unaffected\",\"cpes\":[\"cpe:/a:redhat:optaplanner:::el6\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat Build of Podman Desktop\",\"defaultStatus\":\"unaffected\",\"cpes\":[\"cpe:/a:redhat:podman_desktop:1\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat Data Grid 8\",\"defaultStatus\":\"unaffected\",\"cpes\":[\"cpe:/a:redhat:jboss_data_grid:8\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat Directory Server 11\",\"defaultStatus\":\"unaffected\",\"cpes\":[\"cpe:/a:redhat:directory_server:11\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat Directory Server 12\",\"defaultStatus\":\"unaffected\",\"cpes\":[\"cpe:/a:redhat:directory_server:12\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat Directory Server 13\",\"defaultStatus\":\"unaffected\",\"cpes\":[\"cpe:/a:redhat:directory_server:13\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat Enterprise Linux 10\",\"defaultStatus\":\"unaffected\",\"cpes\":[\"cpe:/o:redhat:enterprise_linux:10\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat Enterprise Linux 8\",\"defaultStatus\":\"unaffected\",\"cpes\":[\"cpe:/o:redhat:enterprise_linux:8\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat Enterprise Linux 9\",\"defaultStatus\":\"unaffected\",\"cpes\":[\"cpe:/o:redhat:enterprise_linux:9\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat Fuse 7\",\"defaultStatus\":\"unaffected\",\"cpes\":[\"cpe:/a:redhat:jboss_fuse:7\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat JBoss Enterprise Application Platform 7\",\"defaultStatus\":\"unaffected\",\"cpes\":[\"cpe:/a:redhat:jboss_enterprise_application_platform:7\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat JBoss Enterprise Application Platform 8\",\"defaultStatus\":\"unaffected\",\"cpes\":[\"cpe:/a:redhat:jboss_enterprise_application_platform:8\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat JBoss Enterprise Application Platform Expansion Pack\",\"defaultStatus\":\"unaffected\",\"cpes\":[\"cpe:/a:redhat:jbosseapxp\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat OpenShift AI (RHOAI)\",\"defaultStatus\":\"unaffected\",\"cpes\":[\"cpe:/a:redhat:openshift_ai\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat OpenShift Container Platform 4\",\"defaultStatus\":\"unaffected\",\"cpes\":[\"cpe:/a:redhat:openshift:4\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat Process Automation 7\",\"defaultStatus\":\"unaffected\",\"cpes\":[\"cpe:/a:redhat:jboss_enterprise_bpms_platform:7\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat Quay 3\",\"defaultStatus\":\"unaffected\",\"cpes\":[\"cpe:/a:redhat:quay:3\"]},{\"vendor\":\"Red Hat\",\"product\":\"streams for Apache Kafka 2\",\"defaultStatus\":\"unaffected\",\"cpes\":[\"cpe:/a:redhat:amq_streams:2\"]},{\"vendor\":\"Red Hat\",\"product\":\"streams for Apache Kafka 3\",\"defaultStatus\":\"unaffected\",\"cpes\":[\"cpe:/a:redhat:amq_streams:3\"]}]}],\"metrics\":{\"cvssMetricV40\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"4.0\",\"vectorString\":\"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X\",\"baseScore\":8.9,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"attackRequirements\":\"NONE\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"vulnConfidentialityImpact\":\"HIGH\",\"vulnIntegrityImpact\":\"HIGH\",\"vulnAvailabilityImpact\":\"HIGH\",\"subConfidentialityImpact\":\"NONE\",\"subIntegrityImpact\":\"NONE\",\"subAvailabilityImpact\":\"NONE\",\"exploitMaturity\":\"PROOF_OF_CONCEPT\",\"confidentialityRequirement\":\"NOT_DEFINED\",\"integrityRequirement\":\"NOT_DEFINED\",\"availabilityRequirement\":\"NOT_DEFINED\",\"modifiedAttackVector\":\"NOT_DEFINED\",\"modifiedAttackComplexity\":\"NOT_DEFINED\",\"modifiedAttackRequirements\":\"NOT_DEFINED\",\"modifiedPrivilegesRequired\":\"NOT_DEFINED\",\"modifiedUserInteraction\":\"NOT_DEFINED\",\"modifiedVulnConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedVulnIntegrityImpact\":\"NOT_DEFINED\",\"modifiedVulnAvailabilityImpact\":\"NOT_DEFINED\",\"modifiedSubConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedSubIntegrityImpact\":\"NOT_DEFINED\",\"modifiedSubAvailabilityImpact\":\"NOT_DEFINED\",\"Safety\":\"NOT_DEFINED\",\"Automatable\":\"NOT_DEFINED\",\"Recovery\":\"NOT_DEFINED\",\"valueDensity\":\"NOT_DEFINED\",\"vulnerabilityResponseEffort\":\"NOT_DEFINED\",\"providerUrgency\":\"NOT_DEFINED\"}}],\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":9.8,\"baseSeverity\":\"CRITICAL\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":3.9,\"impactScore\":5.9},{\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":9.8,\"baseSeverity\":\"CRITICAL\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":3.9,\"impactScore\":5.9}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2026-03-24T17:35:34.197834Z\",\"id\":\"CVE-2026-33228\",\"options\":[{\"exploitation\":\"poc\"},{\"automatable\":\"yes\"},{\"technicalImpact\":\"total\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-1321\"}]},{\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-915\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:webreflection:flatted:*:*:*:*:*:node.js:*:*\",\"versionEndExcluding\":\"3.4.2\",\"matchCriteriaId\":\"B9B19945-5AD9-4557-A372-AF04A9EDC1BB\"}]}]}],\"references\":[{\"url\":\"https://github.com/WebReflection/flatted/commit/885ddcc33cf9657caf38c57c7be45ae1c5272802\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Patch\"]},{\"url\":\"https://github.com/WebReflection/flatted/releases/tag/v3.4.2\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Product\"]},{\"url\":\"https://github.com/WebReflection/flatted/security/advisories/GHSA-rf6f-7fwh-wjgh\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Exploit\",\"Vendor Advisory\"]},{\"url\":\"https://access.redhat.com/errata/RHSA-2026:13826\",\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\"},{\"url\":\"https://access.redhat.com/errata/RHSA-2026:9742\",\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\"},{\"url\":\"https://access.redhat.com/security/cve/CVE-2026-33228\",\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\"},{\"url\":\"https://bugzilla.redhat.com/show_bug.cgi?id=2449872\",\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\"},{\"url\":\"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-33228.json\",\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\"}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"flatted: Flatted: Prototype pollution vulnerability allows arbitrary code execution via crafted JSON.\", \"metrics\": [{\"other\": {\"type\": \"Red Hat severity rating\", \"content\": {\"value\": \"Critical\", \"namespace\": \"https://access.redhat.com/security/updates/classification/\"}}}, {\"format\": \"CVSS\", \"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 9.8, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"CRITICAL\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H\", \"integrityImpact\": \"HIGH\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"HIGH\"}}], \"affected\": [{\"cpes\": [\"cpe:/a:redhat:rhdh:1.8::el9\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Developer Hub 1.8\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:rhdh:1.9::el9\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Developer Hub 1.9\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:red_hat_3scale_amp:2\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat 3scale API Management Platform 2\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:build_keycloak:\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Build of Keycloak\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:red_hat_single_sign_on:7\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Single Sign-On 7\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:cryostat:4\"], \"vendor\": \"Red Hat\", \"product\": \"Cryostat 4\", \"defaultStatus\": \"unaffected\"}, {\"cpes\": [\"cpe:/a:redhat:logging:5\"], \"vendor\": \"Red Hat\", \"product\": \"Logging Subsystem for Red Hat OpenShift\", \"defaultStatus\": \"unaffected\"}, {\"cpes\": [\"cpe:/a:redhat:multicluster_engine\"], \"vendor\": \"Red Hat\", \"product\": \"Multicluster Engine for Kubernetes\", \"defaultStatus\": \"unaffected\"}, {\"cpes\": [\"cpe:/a:redhat:acm:2\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Advanced Cluster Management for Kubernetes 2\", \"defaultStatus\": \"unaffected\"}, {\"cpes\": [\"cpe:/a:redhat:amq_broker:7\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat AMQ Broker 7\", \"defaultStatus\": \"unaffected\"}, {\"cpes\": [\"cpe:/a:redhat:service_registry:2\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat build of Apicurio Registry 2\", \"defaultStatus\": \"unaffected\"}, {\"cpes\": [\"cpe:/a:redhat:optaplanner:::el6\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat build of OptaPlanner 8\", \"defaultStatus\": \"unaffected\"}, {\"cpes\": [\"cpe:/a:redhat:podman_desktop:1\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Build of Podman Desktop\", \"defaultStatus\": \"unaffected\"}, {\"cpes\": [\"cpe:/a:redhat:jboss_data_grid:8\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Data Grid 8\", \"defaultStatus\": \"unaffected\"}, {\"cpes\": [\"cpe:/a:redhat:directory_server:11\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Directory Server 11\", \"defaultStatus\": \"unaffected\"}, {\"cpes\": [\"cpe:/a:redhat:directory_server:12\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Directory Server 12\", \"defaultStatus\": \"unaffected\"}, {\"cpes\": [\"cpe:/a:redhat:directory_server:13\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Directory Server 13\", \"defaultStatus\": \"unaffected\"}, {\"cpes\": [\"cpe:/o:redhat:enterprise_linux:10\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Enterprise Linux 10\", \"defaultStatus\": \"unaffected\"}, {\"cpes\": [\"cpe:/o:redhat:enterprise_linux:8\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Enterprise Linux 8\", \"defaultStatus\": \"unaffected\"}, {\"cpes\": [\"cpe:/o:redhat:enterprise_linux:9\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Enterprise Linux 9\", \"defaultStatus\": \"unaffected\"}, {\"cpes\": [\"cpe:/a:redhat:jboss_fuse:7\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Fuse 7\", \"defaultStatus\": \"unaffected\"}, {\"cpes\": [\"cpe:/a:redhat:jboss_enterprise_application_platform:7\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat JBoss Enterprise Application Platform 7\", \"defaultStatus\": \"unaffected\"}, {\"cpes\": [\"cpe:/a:redhat:jboss_enterprise_application_platform:8\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat JBoss Enterprise Application Platform 8\", \"defaultStatus\": \"unaffected\"}, {\"cpes\": [\"cpe:/a:redhat:jbosseapxp\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat JBoss Enterprise Application Platform Expansion Pack\", \"defaultStatus\": \"unaffected\"}, {\"cpes\": [\"cpe:/a:redhat:openshift_ai\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat OpenShift AI (RHOAI)\", \"defaultStatus\": \"unaffected\"}, {\"cpes\": [\"cpe:/a:redhat:openshift:4\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat OpenShift Container Platform 4\", \"defaultStatus\": \"unaffected\"}, {\"cpes\": [\"cpe:/a:redhat:jboss_enterprise_bpms_platform:7\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Process Automation 7\", \"defaultStatus\": \"unaffected\"}, {\"cpes\": [\"cpe:/a:redhat:quay:3\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Quay 3\", \"defaultStatus\": \"unaffected\"}, {\"cpes\": [\"cpe:/a:redhat:amq_streams:2\"], \"vendor\": \"Red Hat\", \"product\": \"streams for Apache Kafka 2\", \"defaultStatus\": \"unaffected\"}, {\"cpes\": [\"cpe:/a:redhat:amq_streams:3\"], \"vendor\": \"Red Hat\", \"product\": \"streams for Apache Kafka 3\", \"defaultStatus\": \"unaffected\"}], \"timeline\": [{\"lang\": \"en\", \"time\": \"2026-03-21T00:01:43.424Z\", \"value\": \"Reported to Red Hat.\"}, {\"lang\": \"en\", \"time\": \"2026-03-20T23:06:48.485Z\", \"value\": \"Made public.\"}], \"solutions\": [{\"lang\": \"en\", \"value\": \"RHSA-2026:9742: Red Hat Developer Hub 1.8\"}, {\"lang\": \"en\", \"value\": \"RHSA-2026:13826: Red Hat Developer Hub 1.9\"}], \"x_adpType\": \"supplier\", \"datePublic\": \"2026-03-20T23:06:48.485Z\", \"references\": [{\"url\": \"https://access.redhat.com/security/cve/CVE-2026-33228\", \"tags\": [\"vdb-entry\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://bugzilla.redhat.com/show_bug.cgi?id=2449872\", \"name\": \"RHBZ#2449872\", \"tags\": [\"issue-tracking\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-33228.json\", \"tags\": [\"x_sadp-csaf-vex\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2026:9742\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2026:13826\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}], \"x_generator\": {\"engine\": \"sadp-cli 1.0.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"A flaw was found in flatted, a JavaScript Object Notation (JSON) parser designed for handling circular data structures. A remote attacker can exploit this vulnerability by providing specially crafted JSON input. The parse() function in flatted fails to properly validate string values used as array index keys, allowing an attacker to manipulate internal JavaScript object prototypes. This prototype pollution can enable an attacker to execute arbitrary code or cause a denial of service, impacting the availability and integrity of affected systems.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-915\", \"description\": \"Improperly Controlled Modification of Dynamically-Determined Object Attributes\"}]}], \"providerMetadata\": {\"orgId\": \"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\", \"shortName\": \"redhat-SADP\", \"dateUpdated\": \"2026-06-29T12:34:17.953Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-33228\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"poc\"}, {\"Automatable\": \"yes\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-03-24T17:35:34.197834Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-03-24T17:57:13.490Z\"}}], \"cna\": {\"title\": \"flatted: Prototype Pollution via parse()\", \"source\": {\"advisory\": \"GHSA-rf6f-7fwh-wjgh\", \"discovery\": \"UNKNOWN\"}, \"metrics\": [{\"cvssV4_0\": {\"version\": \"4.0\", \"baseScore\": 8.9, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"attackRequirements\": \"NONE\", \"privilegesRequired\": \"NONE\", \"subIntegrityImpact\": \"NONE\", \"vulnIntegrityImpact\": \"HIGH\", \"subAvailabilityImpact\": \"NONE\", \"vulnAvailabilityImpact\": \"HIGH\", \"subConfidentialityImpact\": \"NONE\", \"vulnConfidentialityImpact\": \"HIGH\"}}], \"affected\": [{\"vendor\": \"WebReflection\", \"product\": \"flatted\", \"versions\": [{\"status\": \"affected\", \"version\": \"\u003c 3.4.2\"}]}], \"references\": [{\"url\": \"https://github.com/WebReflection/flatted/security/advisories/GHSA-rf6f-7fwh-wjgh\", \"name\": \"https://github.com/WebReflection/flatted/security/advisories/GHSA-rf6f-7fwh-wjgh\", \"tags\": [\"x_refsource_CONFIRM\"]}, {\"url\": \"https://github.com/WebReflection/flatted/commit/885ddcc33cf9657caf38c57c7be45ae1c5272802\", \"name\": \"https://github.com/WebReflection/flatted/commit/885ddcc33cf9657caf38c57c7be45ae1c5272802\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/WebReflection/flatted/releases/tag/v3.4.2\", \"name\": \"https://github.com/WebReflection/flatted/releases/tag/v3.4.2\", \"tags\": [\"x_refsource_MISC\"]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"flatted is a circular JSON parser. Prior to version 3.4.2, the parse() function in flatted can use attacker-controlled string values from the parsed JSON as direct array index keys, without validating that they are numeric. Since the internal input buffer is a JavaScript Array, accessing it with the key \\\"__proto__\\\" returns Array.prototype via the inherited getter. This object is then treated as a legitimate parsed value and assigned as a property of the output object, effectively leaking a live reference to Array.prototype to the consumer. Any code that subsequently writes to that property will pollute the global prototype. This issue has been patched in version 3.4.2.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-1321\", \"description\": \"CWE-1321: Improperly Controlled Modification of Object Prototype Attributes (\u0027Prototype Pollution\u0027)\"}]}], \"providerMetadata\": {\"orgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"shortName\": \"GitHub_M\", \"dateUpdated\": \"2026-03-20T23:06:48.485Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-33228\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-06-29T12:34:17.953Z\", \"dateReserved\": \"2026-03-18T02:42:27.507Z\", \"assignerOrgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"datePublished\": \"2026-03-20T23:06:48.485Z\", \"assignerShortName\": \"GitHub_M\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.