CVE-2026-58015

Publication date 30 June 2026

Last updated 21 September 2026

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

5.9 · Medium

Score breakdown

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
Fixed 2.88.0-1ubuntu0.1
25.10 questing Ignored end of life, was needs-triage
24.04 LTS noble
Fixed 2.80.0-6ubuntu3.9
22.04 LTS jammy
Fixed 2.72.4-0ubuntu2.10
20.04 LTS focal
Fixed 2.64.6-1~ubuntu20.04.9+esm2
18.04 LTS bionic
Fixed 2.56.4-0ubuntu0.18.04.9+esm6
16.04 LTS xenial
Fixed 2.48.2-0ubuntu4.8+esm6
14.04 LTS trusty
Fixed 2.40.2-0ubuntu1.1+esm8

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Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
glib2.0

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

Related Ubuntu Security Notices (USN)

    • USN-8794-1
    • GLib vulnerabilities
    • 21 September 2026

Other references

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