| Name | CVE-2026-58015 |
| Description | A flaw was found in GLib. The D-Bus client-side implementation of the DBUS_COOKIE_SHA1 SASL authentication mechanism does not validate the cookie_context parameter received from the server. A malicious D-Bus server can supply a cookie_context containing path traversal sequences, causing the client to read an arbitrary file and exfiltrate sensitive data by verifying guessed file contents against a generated hash. |
| 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) |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| glib2.0 (PTS) | bullseye | 2.66.8-1+deb11u4 | vulnerable |
| bullseye (security) | 2.66.8-1+deb11u8 | vulnerable |
| bookworm | 2.74.6-2+deb12u9 | vulnerable |
| bookworm (security) | 2.74.6-2+deb12u2 | vulnerable |
| trixie | 2.84.4-3~deb13u3 | vulnerable |
| forky, sid | 2.88.2-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| glib2.0 | source | (unstable) | 2.88.1-2 | | | |
Notes
[trixie] - glib2.0 <no-dsa> (Minor issue)
[bookworm] - glib2.0 <postponed> (Minor issue; DBUS_COOKIE_SHA1 client path traversal, needs malicious D-Bus server)
[bullseye] - glib2.0 <postponed> (Minor issue; DBUS_COOKIE_SHA1 client path traversal, needs malicious D-Bus server)
https://gitlab.gnome.org/GNOME/glib/-/work_items/3931
https://gitlab.gnome.org/GNOME/glib/-/merge_requests/5172 (2.89.0)
https://gitlab.gnome.org/GNOME/glib/-/merge_requests/5174 (2.88.1)