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CVE-2026-48747

Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Prior to 7.4.13 and 8.0.13, MailomatRequestParser::validateSignature() parsed X-MOM-Webhook-Signature as algo=signature and passed the request-selected algorithm to hash_hmac(), allowing a signature algorithm downgrade instead of enforcing Mailomat's documented SHA-256 webhook signature. This issue is fixed in versions 7.4.13 and 8.0.13.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:9c77cfc2dd350f04fe62e7ee43885760dab47399c1a10f014adc99e8c33117d0
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
2

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 2 assertions

{"product":"mailomat-mailer","vendor":"symfony","versions":[{"status":"affected","version":">= 7.2.0, < 7.4.12"},{"status":"affected","version":">= 8.0.0-BETA1, < 8.0.13"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d9c84b678ca927a32a93a300081bf08656c0b888fe1e8175c6e76d1569d487f3 · sha256:6bc6021dde74653a… · /containers/cna/affected/1

{"product":"symfony","vendor":"symfony","versions":[{"status":"affected","version":">= 7.2.0, < 7.4.12"},{"status":"affected","version":">= 8.0.0-BETA1, < 8.0.13"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d9c84b678ca927a32a93a300081bf08656c0b888fe1e8175c6e76d1569d487f3 · sha256:6bc6021dde74653a… · /containers/cna/affected/0
cwe · 2 assertions

{"cweId":"CWE-347","description":"CWE-347: Improper Verification of Cryptographic Signature","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:d9c84b678ca927a32a93a300081bf08656c0b888fe1e8175c6e76d1569d487f3 · sha256:6bc6021dde74653a… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-757","description":"CWE-757: Selection of Less-Secure Algorithm During Negotiation ('Algorithm Downgrade')","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:d9c84b678ca927a32a93a300081bf08656c0b888fe1e8175c6e76d1569d487f3 · sha256:6bc6021dde74653a… · /containers/cna/problemTypes/1/descriptions/0

Affected products and versions

2 source assertions
{"product":"mailomat-mailer","vendor":"symfony","versions":[{"status":"affected","version":">= 7.2.0, < 7.4.12"},{"status":"affected","version":">= 8.0.0-BETA1, < 8.0.13"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d9c84b678ca927a32a93a300081bf08656c0b888fe1e8175c6e76d1569d487f3 · sha256:6bc6021dde74653a… · /containers/cna/affected/1
{"product":"symfony","vendor":"symfony","versions":[{"status":"affected","version":">= 7.2.0, < 7.4.12"},{"status":"affected","version":">= 8.0.0-BETA1, < 8.0.13"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d9c84b678ca927a32a93a300081bf08656c0b888fe1e8175c6e76d1569d487f3 · sha256:6bc6021dde74653a… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"HIGH","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":6.3,"baseSeverity":"MEDIUM","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:H/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"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:d9c84b678ca927a32a93a300081bf08656c0b888fe1e8175c6e76d1569d487f3 · sha256:6bc6021dde74653a… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

2 source assertions
{"cweId":"CWE-347","description":"CWE-347: Improper Verification of Cryptographic Signature","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:d9c84b678ca927a32a93a300081bf08656c0b888fe1e8175c6e76d1569d487f3 · sha256:6bc6021dde74653a… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-757","description":"CWE-757: Selection of Less-Secure Algorithm During Negotiation ('Algorithm Downgrade')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:d9c84b678ca927a32a93a300081bf08656c0b888fe1e8175c6e76d1569d487f3 · sha256:6bc6021dde74653a… · /containers/cna/problemTypes/1/descriptions/0

Source references

4 source assertions
{"name":"https://github.com/symfony/symfony/commit/bdfe9fe0d94d33dfaca0bc2fe0b00b54767b0c88","tags":["x_refsource_MISC"],"url":"https://github.com/symfony/symfony/commit/bdfe9fe0d94d33dfaca0bc2fe0b00b54767b0c88"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d9c84b678ca927a32a93a300081bf08656c0b888fe1e8175c6e76d1569d487f3 · sha256:6bc6021dde74653a… · /containers/cna/references/1
{"name":"https://github.com/symfony/symfony/releases/tag/v7.4.13","tags":["x_refsource_MISC"],"url":"https://github.com/symfony/symfony/releases/tag/v7.4.13"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d9c84b678ca927a32a93a300081bf08656c0b888fe1e8175c6e76d1569d487f3 · sha256:6bc6021dde74653a… · /containers/cna/references/2
{"name":"https://github.com/symfony/symfony/releases/tag/v8.0.13","tags":["x_refsource_MISC"],"url":"https://github.com/symfony/symfony/releases/tag/v8.0.13"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d9c84b678ca927a32a93a300081bf08656c0b888fe1e8175c6e76d1569d487f3 · sha256:6bc6021dde74653a… · /containers/cna/references/3
{"name":"https://github.com/symfony/symfony/security/advisories/GHSA-rrj9-5q2j-4gvr","tags":["x_refsource_CONFIRM"],"url":"https://github.com/symfony/symfony/security/advisories/GHSA-rrj9-5q2j-4gvr"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d9c84b678ca927a32a93a300081bf08656c0b888fe1e8175c6e76d1569d487f3 · sha256:6bc6021dde74653a… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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