Medium severity · published Jul 14, 2026
CVE-2026-45072
Symfony: Stored XSS in WebProfiler CodeExtension::fileExcerpt() — Unescaped Non-PHP File Rendering
5.4
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 23% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SY
symfony · symfony
>= 6.4.24, < 6.4.40; >= 7.2.9, < 7.4.12; >= 8.0.0-BETA1, < 8.0.12 · source: vendor, NVD
TW
twig-bridge · symfony
>= 6.4.24, < 6.4.40 · source: vendor
WE
web-profiler-bundle · symfony
>= 7.2.9, < 7.4.12; >= 8.0.0-BETA1, < 8.0.12 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-45072
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-45072
Patch
https://github.com/symfony/symfony/commit/863aa81c61166f1aa74b7732df316f76113acbdb
Release Notes
https://github.com/symfony/symfony/releases/tag/v6.4.40
Release Notes
https://github.com/symfony/symfony/releases/tag/v7.4.12
Release Notes
https://github.com/symfony/symfony/releases/tag/v8.0.12
Patch
https://github.com/symfony/symfony/security/advisories/GHSA-hmr5-2xcr-v8pp
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