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Vulnerability · Published Jun 30, 2026 · Assigned by redhat

CVE-2026-58015Glib: path traversal in glib/gio/gdbusauthmechanismsha1.c via keyring_lookup_entry and mechanism_client_data_receive

Medium 5.9

In plain English

A medium-severity path traversal in GLib from GNOME. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 58% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.9Medium
Exploit odds (30 days)0.8%top 42.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:10glib22.80.4-12.el10_2.21ALSA-2026:57015
AlmaLinux:8glib22.56.4-177.el8_10ALSA-2026:61766
AlmaLinux:9glib22.68.4-19.el9_8.9ALSA-2026:55440
AlmaLinux:10glib2-devel2.80.4-12.el10_2.21ALSA-2026:57015
AlmaLinux:8glib2-devel2.56.4-177.el8_10ALSA-2026:61766
AlmaLinux:9glib2-devel2.68.4-19.el9_8.9ALSA-2026:55440
AlmaLinux:10glib2-doc2.80.4-12.el10_2.21ALSA-2026:57015
AlmaLinux:8glib2-doc2.56.4-177.el8_10ALSA-2026:61766
AlmaLinux:9glib2-doc2.68.4-19.el9_8.9ALSA-2026:55440
AlmaLinux:8glib2-fam2.56.4-177.el8_10ALSA-2026:61766
AlmaLinux:10glib2-static2.80.4-12.el10_2.21ALSA-2026:57015
AlmaLinux:8glib2-static2.56.4-177.el8_10ALSA-2026:61766
AlmaLinux:9glib2-static2.68.4-19.el9_8.9ALSA-2026:55440
AlmaLinux:10glib2-tests2.80.4-12.el10_2.21ALSA-2026:57015
AlmaLinux:8glib2-tests2.56.4-177.el8_10ALSA-2026:61766
AlmaLinux:9glib2-tests2.68.4-19.el9_8.9ALSA-2026:55440
AlmaLinux:8mingw32-glib22.70.1-9.el8_10ALSA-2026:49512
AlmaLinux:8mingw32-glib2-static2.70.1-9.el8_10ALSA-2026:49512
AlmaLinux:8mingw64-glib22.70.1-9.el8_10ALSA-2026:49512
AlmaLinux:8mingw64-glib2-static2.70.1-9.el8_10ALSA-2026:49512
Debian:12glib2.0no fix listedDEBIAN-CVE-2026-58015
Debian:13glib2.02.84.4-3~deb13u4DEBIAN-CVE-2026-58015
Debian:14glib2.02.88.1-2DEBIAN-CVE-2026-58015
Rocky Linux:10glib20:2.80.4-12.el10_2.21RLSA-2026:57015
Rocky Linux:8glib20:2.56.4-177.el8_10RLSA-2026:61766
Rocky Linux:9glib20:2.68.4-19.el9_8.9RLSA-2026:55440
Rocky Linux:8mingw-glib20:2.70.1-9.el8_10RLSA-2026:49512
Ubuntu:22.04:LTSglib2.02.72.4-0ubuntu2.10UBUNTU-CVE-2026-58015
Ubuntu:22.04:LTSglib2.02.72.4-0ubuntu2.10USN-8794-1
Ubuntu:24.04:LTSglib2.02.80.0-6ubuntu3.9UBUNTU-CVE-2026-58015
Ubuntu:24.04:LTSglib2.02.80.0-6ubuntu3.9USN-8794-1
Ubuntu:25.10glib2.0no fix listedUBUNTU-CVE-2026-58015
Ubuntu:26.04:LTSglib2.02.88.0-1ubuntu0.1USN-8794-1
Ubuntu:26.04:LTSglib2.02.88.0-1ubuntu0.1UBUNTU-CVE-2026-58015

Affected products (as reported)

VendorProductVersions
GNOME GLib 0 – before 2.88.1
Red Hat Red Hat Enterprise Linux 10 see references
Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support see references
Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support see references
Red Hat Red Hat Enterprise Linux 8 see references
Red Hat Red Hat Enterprise Linux 8 see references
Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support see references
Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On see references
Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support see references
Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On see references
Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service see references
Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions see references
Red Hat Red Hat Enterprise Linux 9 see references
Red Hat Red Hat Enterprise Linux 9 see references
Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions see references
Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions see references
Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support see references
Red Hat Red Hat OpenShift Container Platform 4.12 see references
Red Hat Red Hat OpenShift Container Platform 4.13 see references
Red Hat Red Hat OpenShift Container Platform 4.14 see references
Red Hat Red Hat OpenShift Container Platform 4.15 see references
Red Hat Red Hat OpenShift Container Platform 4.22 see references
Red Hat Cert Manager support for Red Hat OpenShift release 1.17 see references
Red Hat Cert Manager support for Red Hat OpenShift release 1.17 see references
Red Hat Cert Manager support for Red Hat OpenShift release 1.17 see references
Red Hat Cert Manager support for Red Hat OpenShift release 1.17 see references
Red Hat Cert Manager support for Red Hat OpenShift release 1.17 see references
Red Hat Cert Manager support for Red Hat OpenShift release 1.18 see references
Red Hat Cert Manager support for Red Hat OpenShift release 1.18 see references
Red Hat Cert Manager support for Red Hat OpenShift release 1.18 see references

Weakness: CWE-22 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

References