| Name | CVE-2026-88648 |
| Description | Incomplete X.509 implementation in GnuTLS v3.8.13 allows attackers controlling a subordinate Certificate Authority to bypass cross-domain PKI restrictions and issue unauthorized certificates. |
| 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 | 1150522 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| gnutls28 (PTS) | bookworm, bookworm (security) | 3.7.9-2+deb12u7 | vulnerable |
| trixie (security), trixie | 3.8.9-3+deb13u4 | vulnerable |
| forky, sid | 3.8.13-1 | vulnerable |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| gnutls28 | source | (unstable) | (unfixed) | unimportant | | 1150522 |
Notes
https://github.com/lkloliver/poc/tree/main/CVE-2026-88648
Not considered security issues by GNU TLS upstream within the GNU TLS security policy