MEDIUM

CVE-2026-58015

CVSS v3

5.9

MEDIUM

EPSS Score

0.8 %

exploit probability, as of 2026-10-17

CISA KEV

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

glib2AlmaLinux:10all versions · fixed in 2.80.4-12.el10_2.21and 4 other packages
glib2AlmaLinux:9all versions · fixed in 2.68.4-19.el9_8.9and 4 other packages
glib2AlmaLinux:8all versions · fixed in 2.56.4-177.el8_10and 5 other packages
mingw32-glib2AlmaLinux:8all versions · fixed in 2.70.1-9.el8_10and 3 other packages

Vendor advisories

CVE-2026-58015 Red Hat Product Security825 products fixed · 15 known affected
glib: path traversal in glib/gio/gdbusauthmechanismsha1.c via keyring_lookup_entry and mechanism_client_data_receive
mingw-glib2.src as a component of Red Hat Enterprise Linux 10 · mingw32-glib2 as a component of Red Hat Enterprise Linux 10 · mingw32-glib2-static as a component of Red Hat Enterprise Linux 10
RHSA-2026:77320 Red Hat Product Security1 product fixed
Red Hat Security Advisory: OpenShift Container Platform 4.13.72 bug fix and security update
RHSA-2026:82888 Red Hat Product Security1 product fixed
Red Hat Security Advisory: cert-manager Operator for Red Hat OpenShift 1.17.2
RHSA-2026:82857 Red Hat Product Security1 product fixed
Red Hat Security Advisory: cert-manager Operator for Red Hat OpenShift 1.18.2
RHSA-2026:82415 Red Hat Product Security1 product fixed
Red Hat Security Advisory: Red Hat AI Inference 3.5.2 (cpu)
RHSA-2026:82371 Red Hat Product Security3 products fixed
Red Hat Security Advisory: Red Hat AI Inference 3.5.2 (spyre)

69 more advisories

Full record on NVD

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.

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Published: 2026-06-30
Last Modified: 2026-07-02
MSRC Title: Glib: path traversal in glib/gio/gdbusauthmechanismsha1.c via keyring_lookup_entry and mechanism_client_data_receive

Frequently asked questions

What is CVE-2026-58015?

Is CVE-2026-58015 actively exploited?

Active exploitation of CVE-2026-58015 has not been confirmed. Its EPSS score was 0.8% on 2026-10-17, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-58015?

CVE-2026-58015 has a CVSS v3 base score of 5.9 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.

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