| Name | CVE-2026-45186 |
| Description | In libexpat before 2.8.1, the computational complexity of attribute name collision checks allows a denial of service via moderately sized crafted XML input. |
| 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) |
| References | DLA-4807-1, DSA-6404-1 |
| Debian Bugs | 1136164 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| expat (PTS) | bookworm | 2.5.0-1+deb12u2 | vulnerable |
| bookworm (security) | 2.5.0-1+deb12u4 | fixed |
| trixie | 2.8.3-1~deb13u1 | fixed |
| trixie (security) | 2.9.0-1~deb13u1 | fixed |
| forky, sid | 2.9.0-1 | fixed |
The information below is based on the following data on fixed versions.
Notes
https://github.com/libexpat/libexpat/pull/1216
https://blog.hartwork.org/posts/expat-2-8-1-released/