← CVE Intelligence

CVE-2026-45066

Symfony: HtmlSanitizer allowLinkHosts() / allowMediaHosts() Bypass via URL-Parser Differentials and <area> Misclassification PUBLISHED

Description (CNA)

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, HtmlSanitizer URL sanitization can allow off-allowlist URLs through allowLinkHosts() or allowMediaHosts() because UrlSanitizer::parse() follows RFC 3986 while browsers follow WHATWG URL parsing, and because <area href> is checked against the media policy rather than the link policy. This issue is fixed in versions 6.4.40, 7.4.12, and 8.0.12.

Affected (CNA)

Vendor / productVersions
symfony / symfonyaffected >= 6.1.0-BETA1, < 6.4.40; affected >= 7.0.0-BETA1, < 7.4.12; affected >= 8.0.0-BETA1, < 8.0.12
symfony / html-sanitizeraffected >= 6.1.0-BETA1, < 6.4.40; affected >= 7.0.0-BETA1, < 7.4.12; affected >= 8.0.0-BETA1, < 8.0.12

CWE

CWE-184, CWE-436

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.