Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
Symfony's symfony/dependency-injection package, versions from 2.0.0 before 2.0.17, is vulnerable to XML entity expansion attacks. An attacker who can supply XML for parsing can define entities that expand many times, exhausting memory and causing denial of service. Upgrade to version 2.0.17. The source gives few details on workarounds beyond disabling the external entity loader and avoiding unsafe parser options.
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 |
|---|---|---|---|---|
| 7.5 | High | 3.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | 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-c636-cg5r-2498
- OSV: GHSA-c636-cg5r-2498
- github.com/symfony/dependency-injection/commit/5c5040c890a8e4085dcd6fa3827f574ab5f71f4c
- github.com/FriendsOfPHP/security-advisories/blob/master/symfony/dependency-injection/2012-08-28.yaml
- github.com/symfony/dependency-injection
- symfony.com/blog/security-release-symfony-2-0-17-released