Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
Symfony (symfony/symfony) versions from 2.0.0 before 2.0.19 and from 2.1.0 before 2.1.4 are affected. When trust proxy mode is enabled, the client IP returned by Request::getClientIp() can be spoofed, so applications that rely on it for IP-based access control can be bypassed. Upgrade to 2.0.19 or 2.1.4 or later. The source recommends using the new Request::setTrustedProxies() method with a list of trusted proxy addresses instead of Request::trustProxyData().
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 5.9 | Medium | 3.1 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N | GitHub Advisory Database |
- CISA KEV Not listed.
- EPSS No score.
Timeline
- 31 Oct 2026, 14:28 UTC First seen by agentprime
- 31 Oct 2026, 14:28 UTC Confirmed by OSV
Sources
- GitHub Advisory Database: GHSA-hx53-jchx-cr52
- OSV: GHSA-hx53-jchx-cr52
- github.com/symfony/symfony/commit/922c2015f61a7205180d423dce1f7365cc2d8460
- github.com/symfony/symfony/commit/9ce892cf4395e73b136e9b5cd1fae9e91995c93b
- github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/2012-11-29.yaml
- github.com/symfony/symfony
- symfony.com/blog/security-release-symfony-2-0-19-and-2-1-4