CVE-2026-45066

MediumCVSS 6.1/10Last modified Jul 16, 2026

Description

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.

Metrics

CVSS 3.1 6.1/10CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Weakness enumeration

CWE-184 CWE-436

Affected software

Vendor	Product	Versions
symfony	symfony	>= 6.1.0-BETA1, < 6.4.40; >= 7.0.0-BETA1, < 7.4.12; >= 8.0.0-BETA1, < 8.0.12
symfony	html-sanitizer	>= 6.1.0-BETA1, < 6.4.40; >= 7.0.0-BETA1, < 7.4.12; >= 8.0.0-BETA1, < 8.0.12

References

https://github.com/symfony/symfony/commit/d506b556d3d3906f3e8660ad82257ce87edbaac4Patch
https://github.com/symfony/symfony/releases/tag/v6.4.40Product, Release Notes
https://github.com/symfony/symfony/releases/tag/v7.4.12Product, Release Notes
https://github.com/symfony/symfony/releases/tag/v8.0.12Product, Release Notes
https://github.com/symfony/symfony/security/advisories/GHSA-qc95-4862-92fhPatch, Vendor Advisory

Timeline

Published: Jul 14, 2026
Last modified: Jul 16, 2026
NVD status: Analyzed

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