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CVE-2026-45753

Symfony is a PHP framework for web and console applications and a set of reusable PHP components. From 6.1.0-BETA1 until 6.4.40, 7.4.12, and 8.0.12, UrlAttributeSanitizer::getSupportedAttributes() omits URL-valued attributes including action, formaction, poster, and cite, so configurations that admit those attributes can leave javascript: URIs unsanitized and enable XSS when the resulting HTML is rendered or a victim submits a form or clicks a button. This issue is fixed in versions 6.4.40, 7.4.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:c717571e8f80bf1688e3e4b4a10c1cb7fe2104dd261a63412dd1cd3a2f091519
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":"html-sanitizer","vendor":"symfony","versions":[{"status":"affected","version":">= 6.1.0-BETA1, < 6.4.40"},{"status":"affected","version":">= 7.0.0-BETA1, < 7.4.12"},{"status":"affected","version":">= 8.0.0-BETA1, < 8.0.12"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:f15ffa9e49c42107ef550f039f63af3c14bafce2920df70912ea4b8bc58f1860 · sha256:7a8422b467b53c57… · /containers/cna/affected/1

{"product":"symfony","vendor":"symfony","versions":[{"status":"affected","version":">= 6.1.0-BETA1, < 6.4.40"},{"status":"affected","version":">= 7.0.0-BETA1, < 7.4.12"},{"status":"affected","version":">= 8.0.0-BETA1, < 8.0.12"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:f15ffa9e49c42107ef550f039f63af3c14bafce2920df70912ea4b8bc58f1860 · sha256:7a8422b467b53c57… · /containers/cna/affected/0
cwe · 2 assertions

{"cweId":"CWE-79","description":"CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:f15ffa9e49c42107ef550f039f63af3c14bafce2920df70912ea4b8bc58f1860 · sha256:7a8422b467b53c57… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-184","description":"CWE-184: Incomplete List of Disallowed Inputs","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:f15ffa9e49c42107ef550f039f63af3c14bafce2920df70912ea4b8bc58f1860 · sha256:7a8422b467b53c57… · /containers/cna/problemTypes/1/descriptions/0

Affected products and versions

2 source assertions
{"product":"html-sanitizer","vendor":"symfony","versions":[{"status":"affected","version":">= 6.1.0-BETA1, < 6.4.40"},{"status":"affected","version":">= 7.0.0-BETA1, < 7.4.12"},{"status":"affected","version":">= 8.0.0-BETA1, < 8.0.12"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:f15ffa9e49c42107ef550f039f63af3c14bafce2920df70912ea4b8bc58f1860 · sha256:7a8422b467b53c57… · /containers/cna/affected/1
{"product":"symfony","vendor":"symfony","versions":[{"status":"affected","version":">= 6.1.0-BETA1, < 6.4.40"},{"status":"affected","version":">= 7.0.0-BETA1, < 7.4.12"},{"status":"affected","version":">= 8.0.0-BETA1, < 8.0.12"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:f15ffa9e49c42107ef550f039f63af3c14bafce2920df70912ea4b8bc58f1860 · sha256:7a8422b467b53c57… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":2.1,"baseSeverity":"LOW","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"LOW","subIntegrityImpact":"LOW","userInteraction":"ACTIVE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:f15ffa9e49c42107ef550f039f63af3c14bafce2920df70912ea4b8bc58f1860 · sha256:7a8422b467b53c57… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

2 source assertions
{"cweId":"CWE-79","description":"CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:f15ffa9e49c42107ef550f039f63af3c14bafce2920df70912ea4b8bc58f1860 · sha256:7a8422b467b53c57… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-184","description":"CWE-184: Incomplete List of Disallowed Inputs","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:f15ffa9e49c42107ef550f039f63af3c14bafce2920df70912ea4b8bc58f1860 · sha256:7a8422b467b53c57… · /containers/cna/problemTypes/1/descriptions/0

Source references

5 source assertions
{"name":"https://github.com/symfony/symfony/commit/487728e7e180a674a6d4c01bd0cb56161cc441b7","tags":["x_refsource_MISC"],"url":"https://github.com/symfony/symfony/commit/487728e7e180a674a6d4c01bd0cb56161cc441b7"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:f15ffa9e49c42107ef550f039f63af3c14bafce2920df70912ea4b8bc58f1860 · sha256:7a8422b467b53c57… · /containers/cna/references/1
{"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"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:f15ffa9e49c42107ef550f039f63af3c14bafce2920df70912ea4b8bc58f1860 · sha256:7a8422b467b53c57… · /containers/cna/references/2
{"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"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:f15ffa9e49c42107ef550f039f63af3c14bafce2920df70912ea4b8bc58f1860 · sha256:7a8422b467b53c57… · /containers/cna/references/3
{"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"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:f15ffa9e49c42107ef550f039f63af3c14bafce2920df70912ea4b8bc58f1860 · sha256:7a8422b467b53c57… · /containers/cna/references/4
{"name":"https://github.com/symfony/symfony/security/advisories/GHSA-hhg7-c65m-h7ff","tags":["x_refsource_CONFIRM"],"url":"https://github.com/symfony/symfony/security/advisories/GHSA-hhg7-c65m-h7ff"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:f15ffa9e49c42107ef550f039f63af3c14bafce2920df70912ea4b8bc58f1860 · sha256:7a8422b467b53c57… · /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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