XSS in Sensiolabs Symfony
CVE-2026-45072
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.
Vulnerability class: XSS (Cross-Site Scripting)
EPSS: 0.003 (22.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.
Affected products
- Sensiolabs Symfony
- Symfony — versions >= 6.4.24, < 6.4.40, >= 7.2.9, < 7.4.12, >= 8.0.0-BETA1, < 8.0.12
- Symfony Twig-bridge — versions >= 6.4.24, < 6.4.40
- Symfony Web-profiler-bundle — versions >= 7.2.9, < 7.4.12, >= 8.0.0-BETA1, < 8.0.12
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Patch, Vendor Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC, Release Notes)
- security-advisories@github.com (x_refsource_MISC, Release Notes)
- security-advisories@github.com (x_refsource_MISC, Release Notes)
Frequently asked questions
- What is CVE-2026-45072?
- CVE-2026-45072 is a medium-severity vulnerability in Sensiolabs Symfony, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-07-14.
- How severe is CVE-2026-45072?
- Medium severity. CVSS v3 base score is 5.4 out of 10.