CVE-2026-27880 (GCVE-0-2026-27880)

Vulnerability from cvelistv5 – Published: 2026-03-27 14:12 – Updated: 2026-06-30 12:08
VLAI
Title
OpenFeature evaluation API reads input data with no bounds
Summary
The OpenFeature feature toggle evaluation endpoint reads unbounded values into memory, which can cause out-of-memory crashes.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-125 - Out-of-bounds Read
  • CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
Impacted products
Vendor Product Version
Grafana Grafana Affected: v12.1.0 , < v12.1.10 (semver)
Affected: v12.2.0 , < v12.2.8 (semver)
Affected: v12.3.0 , < v12.3.6 (semver)
Affected: v12.4.0 , < v12.4.2 (semver)
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 9     cpe:/o:redhat:enterprise_linux:9
 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.
Date Public
2026-03-27 14:08
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-27880",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-03-27T14:43:21.670196Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-125",
                "description": "CWE-125 Out-of-bounds Read",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-10T13:56:28.749Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "references": [
          {
            "tags": [
              "broken-link"
            ],
            "url": "https://grafana.com/security/security-advisories/cve-2026-27880"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      },
      {
        "affected": [
          {
            "cpes": [
              "cpe:/o:redhat:enterprise_linux:10"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux 10",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/o:redhat:enterprise_linux:9"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux 9",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/o:redhat:enterprise_linux:8"
            ],
            "defaultStatus": "unaffected",
            "product": "Red Hat Enterprise Linux 8",
            "vendor": "Red Hat"
          }
        ],
        "datePublic": "2026-03-27T14:12:20.075Z",
        "descriptions": [
          {
            "lang": "en",
            "value": "A flaw was found in Grafana. A remote attacker can exploit the feature toggle evaluation endpoint by sending unbounded values, causing the system to read excessive data into memory. This can lead to out-of-memory crashes, resulting in a Denial of Service (DoS) for the affected service."
          }
        ],
        "metrics": [
          {
            "other": {
              "content": {
                "namespace": "https://access.redhat.com/security/updates/classification/",
                "value": "Important"
              },
              "type": "Red Hat severity rating"
            }
          },
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 7.5,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
              "version": "3.1"
            },
            "format": "CVSS"
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-770",
                "description": "Allocation of Resources Without Limits or Throttling",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-06-30T12:08:03.581Z",
          "orgId": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
          "shortName": "redhat-SADP"
        },
        "references": [
          {
            "tags": [
              "vdb-entry",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/security/cve/CVE-2026-27880"
          },
          {
            "name": "RHBZ#2452295",
            "tags": [
              "issue-tracking",
              "x_refsource_REDHAT"
            ],
            "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2452295"
          },
          {
            "tags": [
              "x_sadp-csaf-vex"
            ],
            "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-27880.json"
          }
        ],
        "timeline": [
          {
            "lang": "en",
            "time": "2026-03-27T15:03:43.019Z",
            "value": "Reported to Red Hat."
          },
          {
            "lang": "en",
            "time": "2026-03-27T14:12:20.075Z",
            "value": "Made public."
          }
        ],
        "title": "Grafana: Grafana: Denial of Service via unbounded memory read in feature toggle evaluation",
        "workarounds": [
          {
            "lang": "en",
            "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability."
          }
        ],
        "x_adpType": "supplier",
        "x_generator": {
          "engine": "sadp-cli 1.0.0"
        }
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Grafana",
          "vendor": "Grafana",
          "versions": [
            {
              "lessThan": "v12.1.10",
              "status": "affected",
              "version": "v12.1.0",
              "versionType": "semver"
            },
            {
              "lessThan": "v12.2.8",
              "status": "affected",
              "version": "v12.2.0",
              "versionType": "semver"
            },
            {
              "lessThan": "v12.3.6",
              "status": "affected",
              "version": "v12.3.0",
              "versionType": "semver"
            },
            {
              "lessThan": "v12.4.2",
              "status": "affected",
              "version": "v12.4.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "datePublic": "2026-03-27T14:08:45.874Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "The OpenFeature feature toggle evaluation endpoint reads unbounded values into memory, which can cause out-of-memory crashes."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          }
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-22T16:31:35.046Z",
        "orgId": "57da9224-a3e2-4646-9d0e-c4dc2e05e7da",
        "shortName": "GRAFANA"
      },
      "references": [
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://grafana.com/security/security-advisories/cve-2026-27880"
        }
      ],
      "source": {
        "discovery": "INTERNAL_FINDING"
      },
      "title": "OpenFeature evaluation API reads input data with no bounds",
      "x_generator": {
        "engine": "cvelib 1.8.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "57da9224-a3e2-4646-9d0e-c4dc2e05e7da",
    "assignerShortName": "GRAFANA",
    "cveId": "CVE-2026-27880",
    "datePublished": "2026-03-27T14:12:20.075Z",
    "dateReserved": "2026-02-24T14:30:17.727Z",
    "dateUpdated": "2026-06-30T12:08:03.581Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-27880",
      "date": "2026-07-03",
      "epss": "0.00772",
      "percentile": "0.51172"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-27880\",\"sourceIdentifier\":\"security@grafana.com\",\"published\":\"2026-03-27T15:16:51.323\",\"lastModified\":\"2026-06-30T03:17:59.190\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"The OpenFeature feature toggle evaluation endpoint reads unbounded values into memory, which can cause out-of-memory crashes.\"}],\"affected\":[{\"source\":\"security@grafana.com\",\"affectedData\":[{\"vendor\":\"Grafana\",\"product\":\"Grafana\",\"defaultStatus\":\"unaffected\",\"versions\":[{\"version\":\"v12.1.0\",\"lessThan\":\"v12.1.10\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"v12.2.0\",\"lessThan\":\"v12.2.8\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"v12.3.0\",\"lessThan\":\"v12.3.6\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"v12.4.0\",\"lessThan\":\"v12.4.2\",\"versionType\":\"semver\",\"status\":\"affected\"}]}]},{\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\",\"affectedData\":[{\"vendor\":\"Red Hat\",\"product\":\"Red Hat Enterprise Linux 10\",\"defaultStatus\":\"affected\",\"cpes\":[\"cpe:/o:redhat:enterprise_linux:10\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat Enterprise Linux 9\",\"defaultStatus\":\"affected\",\"cpes\":[\"cpe:/o:redhat:enterprise_linux:9\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat Enterprise Linux 8\",\"defaultStatus\":\"unaffected\",\"cpes\":[\"cpe:/o:redhat:enterprise_linux:8\"]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"security@grafana.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":7.5,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":3.9,\"impactScore\":3.6},{\"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:N/I:N/A:H\",\"baseScore\":7.5,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":3.9,\"impactScore\":3.6}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2026-03-27T14:43:21.670196Z\",\"id\":\"CVE-2026-27880\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"yes\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-787\"}]},{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-125\"}]},{\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-770\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:grafana:grafana:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"12.1.0\",\"matchCriteriaId\":\"004E77E1-58B9-4F05-B788-5C52FBB8A25E\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:grafana:grafana:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"12.1.10\",\"versionEndExcluding\":\"12.2.0\",\"matchCriteriaId\":\"AE3F977F-FF94-4A15-918C-54241EC49560\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:grafana:grafana:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"12.2.8\",\"versionEndExcluding\":\"12.3.0\",\"matchCriteriaId\":\"CB499815-0B44-4BF9-AB14-F7272EF0173F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:grafana:grafana:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"12.3.6\",\"versionEndExcluding\":\"12.4.0\",\"matchCriteriaId\":\"7F2B145A-24E0-4C0F-BF82-FFD2B1301B51\"}]}]}],\"references\":[{\"url\":\"https://grafana.com/security/security-advisories/cve-2026-27880\",\"source\":\"security@grafana.com\",\"tags\":[\"Vendor Advisory\"]},{\"url\":\"https://access.redhat.com/security/cve/CVE-2026-27880\",\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\"},{\"url\":\"https://bugzilla.redhat.com/show_bug.cgi?id=2452295\",\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\"},{\"url\":\"https://grafana.com/security/security-advisories/cve-2026-27880\",\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"tags\":[\"Vendor Advisory\"]},{\"url\":\"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-27880.json\",\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\"}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-27880\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"yes\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-03-27T14:43:21.670196Z\"}}}], \"references\": [{\"url\": \"https://grafana.com/security/security-advisories/cve-2026-27880\", \"tags\": [\"broken-link\"]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-125\", \"description\": \"CWE-125 Out-of-bounds Read\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-03-27T14:40:50.982Z\"}}], \"cna\": {\"title\": \"OpenFeature evaluation API reads input data with no bounds\", \"source\": {\"discovery\": \"INTERNAL_FINDING\"}, \"metrics\": [{\"cvssV3_1\": {\"version\": \"3.1\", \"baseScore\": 7.5, \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\"}}], \"affected\": [{\"vendor\": \"Grafana\", \"product\": \"Grafana\", \"versions\": [{\"status\": \"affected\", \"version\": \"v12.1.0\", \"lessThan\": \"v12.1.10\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"v12.2.0\", \"lessThan\": \"v12.2.8\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"v12.3.0\", \"lessThan\": \"v12.3.6\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"v12.4.0\", \"lessThan\": \"v12.4.2\", \"versionType\": \"semver\"}], \"defaultStatus\": \"unaffected\"}], \"datePublic\": \"2026-03-27T14:08:45.874Z\", \"references\": [{\"url\": \"https://grafana.com/security/security-advisories/cve-2026-27880\", \"tags\": [\"vendor-advisory\"]}], \"x_generator\": {\"engine\": \"cvelib 1.8.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"The OpenFeature feature toggle evaluation endpoint reads unbounded values into memory, which can cause out-of-memory crashes.\"}], \"providerMetadata\": {\"orgId\": \"57da9224-a3e2-4646-9d0e-c4dc2e05e7da\", \"shortName\": \"GRAFANA\", \"dateUpdated\": \"2026-06-19T19:02:52.188Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-27880\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-06-19T19:02:52.188Z\", \"dateReserved\": \"2026-02-24T14:30:17.727Z\", \"assignerOrgId\": \"57da9224-a3e2-4646-9d0e-c4dc2e05e7da\", \"datePublished\": \"2026-03-27T14:12:20.075Z\", \"assignerShortName\": \"GRAFANA\"}",
      "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.