Vulnerability · Published Jul 14, 2026 · Assigned by GitHub_M
CVE-2026-45072Symfony: Stored XSS in WebProfiler CodeExtension::fileExcerpt() — Unescaped Non-PHP File Rendering
Low 2.0
In plain English
A low-severity cross-site scripting in symfony from symfony. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 23% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
Symfony is a PHP framework for web and console applications and a set of reusable PHP components. From 6.4.24 until 6.4.40, 7.4.12, and 8.0.12, the development profiler file_excerpt Twig filter escapes PHP files through highlight_string() but interpolates lines from non-PHP files directly into <code> elements, allowing stored XSS against a developer who opens an attacker-written file such as var/log/dev.log in the profiler. This issue is fixed in versions 6.4.40, 7.4.12, and 8.0.12.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:13 | symfony | 6.4.41+dfsg-0+deb13u1 | DEBIAN-CVE-2026-45072 |
| Debian:14 | symfony | 7.4.12+dfsg-1 | DEBIAN-CVE-2026-45072 |
| Packagist | symfony/symfony | 8.0.12 | GHSA-hmr5-2xcr-v8pp |
| Packagist | symfony/symfony | 7.4.12 | GHSA-hmr5-2xcr-v8pp |
| Packagist | symfony/symfony | 6.4.40 | GHSA-hmr5-2xcr-v8pp |
| Packagist | symfony/twig-bridge | 6.4.40 | GHSA-hmr5-2xcr-v8pp |
| Packagist | symfony/web-profiler-bundle | 8.0.12 | GHSA-hmr5-2xcr-v8pp |
| Packagist | symfony/web-profiler-bundle | 7.4.12 | GHSA-hmr5-2xcr-v8pp |
| Ubuntu:25.10 | symfony | no fix listed | UBUNTU-CVE-2026-45072 |
| Ubuntu:26.04:LTS | symfony | no fix listed | UBUNTU-CVE-2026-45072 |
| Ubuntu:26.10 | symfony | no fix listed | UBUNTU-CVE-2026-45072 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| symfony | symfony | >= 6.4.24, < 6.4.40>= 7.2.9, < 7.4.12>= 8.0.0-BETA1, < 8.0.12 |
| symfony | twig-bridge | >= 6.4.24, < 6.4.40 |
| symfony | web-profiler-bundle | >= 7.2.9, < 7.4.12>= 8.0.0-BETA1, < 8.0.12 |
Weakness: CWE-79 · Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
References
- https://github.com/symfony/symfony/security/advisories/GHSA-hmr5-2xcr-v8pp x_refsource_CONFIRM
- https://github.com/symfony/symfony/commit/863aa81c61166f1aa74b7732df316f76113acbdb x_refsource_MISC
- https://github.com/symfony/symfony/releases/tag/v6.4.40 x_refsource_MISC
- https://github.com/symfony/symfony/releases/tag/v7.4.12 x_refsource_MISC
- https://github.com/symfony/symfony/releases/tag/v8.0.12 x_refsource_MISC