CVE-2026-45754 (GCVE-0-2026-45754)

Vulnerability from cvelistv5 – Published: 2026-07-14 18:54 – Updated: 2026-07-21 17:54
VLAI
Title
Symfony: Mailjet Mailer Webhook Parser Never Verifies the Configured Secret — Unauthenticated Webhook Event Injection
Summary
Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Prior to 6.4.40, 7.4.12, and 8.0.12, the Mailjet mailer bridge and LOX24 notifier bridge webhook parsers received configured webhook secrets but did not verify them, allowing unauthenticated POST requests to inject forged Mailjet and LOX24 event payloads. This issue is fixed in versions 6.4.40, 7.4.12, and 8.0.12.
Severity
6.9 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-287 - Improper Authentication
  • CWE-306 - Missing Authentication for Critical Function
Assigner
References
Impacted products
Vendor Product Version
symfony symfony Affected: >= 6.4.0, < 6.4.40
Affected: >= 7.0.0-BETA1, < 7.4.12
Affected: >= 8.0.0-BETA1, < 8.0.12
Create a notification for this product.
symfony lox24-notifier Affected: >= 7.1.0-BETA1, < 7.4.12
Affected: >= 8.0.0-BETA1, < 8.0.12
Create a notification for this product.
symfony mailjet-mailer Affected: >= 6.4.0, < 6.4.40
Affected: >= 7.0.0-BETA1, < 7.4.12
Affected: >= 8.0.0-BETA1, < 8.0.12
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-45754",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-07-21T17:53:57.815633Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-07-21T17:54:06.698Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "symfony",
          "vendor": "symfony",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 6.4.0, \u003c 6.4.40"
            },
            {
              "status": "affected",
              "version": "\u003e= 7.0.0-BETA1, \u003c 7.4.12"
            },
            {
              "status": "affected",
              "version": "\u003e= 8.0.0-BETA1, \u003c 8.0.12"
            }
          ]
        },
        {
          "product": "lox24-notifier",
          "vendor": "symfony",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 7.1.0-BETA1, \u003c 7.4.12"
            },
            {
              "status": "affected",
              "version": "\u003e= 8.0.0-BETA1, \u003c 8.0.12"
            }
          ]
        },
        {
          "product": "mailjet-mailer",
          "vendor": "symfony",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 6.4.0, \u003c 6.4.40"
            },
            {
              "status": "affected",
              "version": "\u003e= 7.0.0-BETA1, \u003c 7.4.12"
            },
            {
              "status": "affected",
              "version": "\u003e= 8.0.0-BETA1, \u003c 8.0.12"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Prior to 6.4.40, 7.4.12, and 8.0.12, the Mailjet mailer bridge and LOX24 notifier bridge webhook parsers received configured webhook secrets but did not verify them, allowing unauthenticated POST requests to inject forged Mailjet and LOX24 event payloads. This issue is fixed in versions 6.4.40, 7.4.12, and 8.0.12."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 6.9,
            "baseSeverity": "MEDIUM",
            "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:N/VI:L/VA:N/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "LOW"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-287",
              "description": "CWE-287: Improper Authentication",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-306",
              "description": "CWE-306: Missing Authentication for Critical Function",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-14T18:54:24.337Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/symfony/symfony/security/advisories/GHSA-64hg-93w9-fc35",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/symfony/symfony/security/advisories/GHSA-64hg-93w9-fc35"
        },
        {
          "name": "https://github.com/symfony/symfony/commit/3e52bf5ab733ee32e35eeeeb2631d859c941838e",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/symfony/symfony/commit/3e52bf5ab733ee32e35eeeeb2631d859c941838e"
        },
        {
          "name": "https://github.com/symfony/symfony/commit/4aaa45dd054f73445f1ab254968b7e60b546cc77",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/symfony/symfony/commit/4aaa45dd054f73445f1ab254968b7e60b546cc77"
        },
        {
          "name": "https://github.com/symfony/symfony/releases/tag/v6.4.40",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/symfony/symfony/releases/tag/v6.4.40"
        },
        {
          "name": "https://github.com/symfony/symfony/releases/tag/v7.4.12",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/symfony/symfony/releases/tag/v7.4.12"
        },
        {
          "name": "https://github.com/symfony/symfony/releases/tag/v8.0.12",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/symfony/symfony/releases/tag/v8.0.12"
        }
      ],
      "source": {
        "advisory": "GHSA-64hg-93w9-fc35",
        "discovery": "UNKNOWN"
      },
      "title": "Symfony: Mailjet Mailer Webhook Parser Never Verifies the Configured Secret \u2014 Unauthenticated Webhook Event Injection"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-45754",
    "datePublished": "2026-07-14T18:54:24.337Z",
    "dateReserved": "2026-05-13T06:54:34.221Z",
    "dateUpdated": "2026-07-21T17:54:06.698Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-45754",
      "date": "2026-07-25",
      "epss": "0.00348",
      "percentile": "0.27346"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-45754\",\"sourceIdentifier\":\"security-advisories@github.com\",\"published\":\"2026-07-14T19:17:07.777\",\"lastModified\":\"2026-07-21T18:16:58.550\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Prior to 6.4.40, 7.4.12, and 8.0.12, the Mailjet mailer bridge and LOX24 notifier bridge webhook parsers received configured webhook secrets but did not verify them, allowing unauthenticated POST requests to inject forged Mailjet and LOX24 event payloads. This issue is fixed in versions 6.4.40, 7.4.12, and 8.0.12.\"}],\"affected\":[{\"source\":\"security-advisories@github.com\",\"affectedData\":[{\"vendor\":\"symfony\",\"product\":\"symfony\",\"versions\":[{\"version\":\"\u003e= 6.4.0, \u003c 6.4.40\",\"status\":\"affected\"},{\"version\":\"\u003e= 7.0.0-BETA1, \u003c 7.4.12\",\"status\":\"affected\"},{\"version\":\"\u003e= 8.0.0-BETA1, \u003c 8.0.12\",\"status\":\"affected\"}]},{\"vendor\":\"symfony\",\"product\":\"lox24-notifier\",\"versions\":[{\"version\":\"\u003e= 7.1.0-BETA1, \u003c 7.4.12\",\"status\":\"affected\"},{\"version\":\"\u003e= 8.0.0-BETA1, \u003c 8.0.12\",\"status\":\"affected\"}]},{\"vendor\":\"symfony\",\"product\":\"mailjet-mailer\",\"versions\":[{\"version\":\"\u003e= 6.4.0, \u003c 6.4.40\",\"status\":\"affected\"},{\"version\":\"\u003e= 7.0.0-BETA1, \u003c 7.4.12\",\"status\":\"affected\"},{\"version\":\"\u003e= 8.0.0-BETA1, \u003c 8.0.12\",\"status\":\"affected\"}]}]}],\"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:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/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\":6.9,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"attackRequirements\":\"NONE\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"vulnConfidentialityImpact\":\"NONE\",\"vulnIntegrityImpact\":\"LOW\",\"vulnAvailabilityImpact\":\"NONE\",\"subConfidentialityImpact\":\"NONE\",\"subIntegrityImpact\":\"NONE\",\"subAvailabilityImpact\":\"NONE\",\"exploitMaturity\":\"NOT_DEFINED\",\"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:N/I:L/A:N\",\"baseScore\":5.3,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"LOW\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":3.9,\"impactScore\":1.4}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2026-07-21T17:53:57.815633Z\",\"id\":\"CVE-2026-45754\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"yes\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-287\"},{\"lang\":\"en\",\"value\":\"CWE-306\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.4.0\",\"versionEndExcluding\":\"6.4.40\",\"matchCriteriaId\":\"FF1951CE-B6ED-43DC-A865-A3351DC994F3\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"7.0.0\",\"versionEndExcluding\":\"7.4.12\",\"matchCriteriaId\":\"F70A408A-E0B5-48A8-AA3A-4F9DE365BB56\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"8.0.0\",\"versionEndExcluding\":\"8.0.12\",\"matchCriteriaId\":\"6AF5BEE2-34A1-4C5D-8544-8BC68C9EDDFA\"}]}]}],\"references\":[{\"url\":\"https://github.com/symfony/symfony/commit/3e52bf5ab733ee32e35eeeeb2631d859c941838e\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Patch\"]},{\"url\":\"https://github.com/symfony/symfony/commit/4aaa45dd054f73445f1ab254968b7e60b546cc77\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Patch\"]},{\"url\":\"https://github.com/symfony/symfony/releases/tag/v6.4.40\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Release Notes\"]},{\"url\":\"https://github.com/symfony/symfony/releases/tag/v7.4.12\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Release Notes\"]},{\"url\":\"https://github.com/symfony/symfony/releases/tag/v8.0.12\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Release Notes\"]},{\"url\":\"https://github.com/symfony/symfony/security/advisories/GHSA-64hg-93w9-fc35\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Patch\",\"Vendor Advisory\"]}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-45754\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"yes\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-07-21T17:53:57.815633Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-07-21T17:54:02.476Z\"}}], \"cna\": {\"title\": \"Symfony: Mailjet Mailer Webhook Parser Never Verifies the Configured Secret \\u2014 Unauthenticated Webhook Event Injection\", \"source\": {\"advisory\": \"GHSA-64hg-93w9-fc35\", \"discovery\": \"UNKNOWN\"}, \"metrics\": [{\"cvssV4_0\": {\"version\": \"4.0\", \"baseScore\": 6.9, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"attackRequirements\": \"NONE\", \"privilegesRequired\": \"NONE\", \"subIntegrityImpact\": \"NONE\", \"vulnIntegrityImpact\": \"LOW\", \"subAvailabilityImpact\": \"NONE\", \"vulnAvailabilityImpact\": \"NONE\", \"subConfidentialityImpact\": \"NONE\", \"vulnConfidentialityImpact\": \"NONE\"}}], \"affected\": [{\"vendor\": \"symfony\", \"product\": \"symfony\", \"versions\": [{\"status\": \"affected\", \"version\": \"\u003e= 6.4.0, \u003c 6.4.40\"}, {\"status\": \"affected\", \"version\": \"\u003e= 7.0.0-BETA1, \u003c 7.4.12\"}, {\"status\": \"affected\", \"version\": \"\u003e= 8.0.0-BETA1, \u003c 8.0.12\"}]}, {\"vendor\": \"symfony\", \"product\": \"lox24-notifier\", \"versions\": [{\"status\": \"affected\", \"version\": \"\u003e= 7.1.0-BETA1, \u003c 7.4.12\"}, {\"status\": \"affected\", \"version\": \"\u003e= 8.0.0-BETA1, \u003c 8.0.12\"}]}, {\"vendor\": \"symfony\", \"product\": \"mailjet-mailer\", \"versions\": [{\"status\": \"affected\", \"version\": \"\u003e= 6.4.0, \u003c 6.4.40\"}, {\"status\": \"affected\", \"version\": \"\u003e= 7.0.0-BETA1, \u003c 7.4.12\"}, {\"status\": \"affected\", \"version\": \"\u003e= 8.0.0-BETA1, \u003c 8.0.12\"}]}], \"references\": [{\"url\": \"https://github.com/symfony/symfony/security/advisories/GHSA-64hg-93w9-fc35\", \"name\": \"https://github.com/symfony/symfony/security/advisories/GHSA-64hg-93w9-fc35\", \"tags\": [\"x_refsource_CONFIRM\"]}, {\"url\": \"https://github.com/symfony/symfony/commit/3e52bf5ab733ee32e35eeeeb2631d859c941838e\", \"name\": \"https://github.com/symfony/symfony/commit/3e52bf5ab733ee32e35eeeeb2631d859c941838e\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/symfony/symfony/commit/4aaa45dd054f73445f1ab254968b7e60b546cc77\", \"name\": \"https://github.com/symfony/symfony/commit/4aaa45dd054f73445f1ab254968b7e60b546cc77\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/symfony/symfony/releases/tag/v6.4.40\", \"name\": \"https://github.com/symfony/symfony/releases/tag/v6.4.40\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/symfony/symfony/releases/tag/v7.4.12\", \"name\": \"https://github.com/symfony/symfony/releases/tag/v7.4.12\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/symfony/symfony/releases/tag/v8.0.12\", \"name\": \"https://github.com/symfony/symfony/releases/tag/v8.0.12\", \"tags\": [\"x_refsource_MISC\"]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Prior to 6.4.40, 7.4.12, and 8.0.12, the Mailjet mailer bridge and LOX24 notifier bridge webhook parsers received configured webhook secrets but did not verify them, allowing unauthenticated POST requests to inject forged Mailjet and LOX24 event payloads. This issue is fixed in versions 6.4.40, 7.4.12, and 8.0.12.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-287\", \"description\": \"CWE-287: Improper Authentication\"}]}, {\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-306\", \"description\": \"CWE-306: Missing Authentication for Critical Function\"}]}], \"providerMetadata\": {\"orgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"shortName\": \"GitHub_M\", \"dateUpdated\": \"2026-07-14T18:54:24.337Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-45754\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-07-21T17:54:06.698Z\", \"dateReserved\": \"2026-05-13T06:54:34.221Z\", \"assignerOrgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"datePublished\": \"2026-07-14T18:54:24.337Z\", \"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.