| Name | CVE-2026-24515 |
| Description | In libexpat before 2.7.4, XML_ExternalEntityParserCreate does not copy unknown encoding handler user data. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 1126277 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| expat (PTS) | bullseye | 2.2.10-2+deb11u5 | vulnerable |
| bullseye (security) | 2.2.10-2+deb11u7 | vulnerable |
| bookworm | 2.5.0-1+deb12u2 | vulnerable |
| bookworm (security) | 2.5.0-1+deb12u1 | vulnerable |
| trixie | 2.7.1-2 | vulnerable |
| forky, sid | 2.7.4-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| expat | source | (unstable) | 2.7.3-2 | | | 1126277 |
Notes
[trixie] - expat <no-dsa> (Minor issue)
[bookworm] - expat <no-dsa> (Minor issue)
[bullseye] - expat <postponed> (Minor issue, DoS)
https://github.com/libexpat/libexpat/pull/1131
Fixed by: https://github.com/libexpat/libexpat/commit/86fc914a7acc49246d5fde0ab6ed97eb8a0f15f9 (R_2_7_4)
Test case: https://github.com/libexpat/libexpat/commit/8efea3e255d55c7e0a5b70b226f4652ab00e1a27 (R_2_7_4)
Documentation: https://github.com/libexpat/libexpat/commit/3de54af0969418014e9093dd2b41bd712dd9b12e (R_2_7_4)