CVE-2026-58015
Publication date 30 June 2026
Last updated 1 July 2026
Ubuntu priority
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.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| glib2.0 | 26.04 LTS resolute |
Needs evaluation
|
| 25.10 questing |
Needs evaluation
|
|
| 24.04 LTS noble |
Needs evaluation
|
|
| 22.04 LTS jammy |
Needs evaluation
|
|
| 20.04 LTS focal |
Needs evaluation
|
|
| 18.04 LTS bionic |
Needs evaluation
|
|
| 16.04 LTS xenial |
Needs evaluation
|
|
| 14.04 LTS trusty |
Needs evaluation
|
Severity score breakdown
CVSS version: CVSS v3.0
Base score
5.9 · Medium
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
References
Other references
- https://www.cve.org/CVERecord?id=CVE-2026-58015
- 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)
- https://access.redhat.com/security/cve/CVE-2026-58015
- https://bugzilla.redhat.com/show_bug.cgi?id=2492256
- https://gitlab.gnome.org/GNOME/glib/-/issues/3931