Is CVE-2026-58015 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-58015?

CVE-2026-58015 has a CVSS v3 severity of MEDIUM (5.9).

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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.