Bug 2492256 (CVE-2026-58015) - CVE-2026-58015 glib: path traversal in glib/gio/gdbusauthmechanismsha1.c via keyring_lookup_entry and mechanism_client_data_receive
Summary: CVE-2026-58015 glib: path traversal in glib/gio/gdbusauthmechanismsha1.c via ...
Keywords:
Status: NEW
Alias: CVE-2026-58015
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2494882 2494883 2494884
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-06-24 17:28 UTC by OSIDB Bzimport
Modified: 2026-09-15 09:19 UTC (History)
21 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2026:57606 0 None None None 2026-08-20 16:35:08 UTC
Red Hat Product Errata RHBA-2026:58991 0 None None None 2026-08-24 12:47:52 UTC
Red Hat Product Errata RHBA-2026:61344 0 None None None 2026-08-31 09:10:10 UTC
Red Hat Product Errata RHBA-2026:61808 0 None None None 2026-09-01 00:25:58 UTC
Red Hat Product Errata RHBA-2026:62574 0 None None None 2026-09-02 10:22:20 UTC
Red Hat Product Errata RHSA-2026:49512 0 None None None 2026-08-03 01:47:17 UTC
Red Hat Product Errata RHSA-2026:55440 0 None None None 2026-08-17 05:48:54 UTC
Red Hat Product Errata RHSA-2026:57015 0 None None None 2026-08-19 16:42:05 UTC
Red Hat Product Errata RHSA-2026:61766 0 None None None 2026-08-31 19:29:28 UTC
Red Hat Product Errata RHSA-2026:65762 0 None None None 2026-09-09 02:27:02 UTC
Red Hat Product Errata RHSA-2026:65763 0 None None None 2026-09-09 03:09:54 UTC
Red Hat Product Errata RHSA-2026:65767 0 None None None 2026-09-09 02:59:49 UTC
Red Hat Product Errata RHSA-2026:65768 0 None None None 2026-09-09 03:27:27 UTC
Red Hat Product Errata RHSA-2026:65769 0 None None None 2026-09-09 03:04:29 UTC
Red Hat Product Errata RHSA-2026:65770 0 None None None 2026-09-09 03:28:35 UTC
Red Hat Product Errata RHSA-2026:65771 0 None None None 2026-09-09 02:59:33 UTC
Red Hat Product Errata RHSA-2026:65773 0 None None None 2026-09-09 03:15:03 UTC
Red Hat Product Errata RHSA-2026:66357 0 None None None 2026-09-15 09:19:19 UTC

Description OSIDB Bzimport 2026-06-24 17:28:24 UTC 
The GLib D-Bus client-side implementation of the DBUS_COOKIE_SHA1 SASL authentication mechanism does not validate the cookie_context parameter received from the server. The D-Bus specification explicitly states that cookie context names must not contain the characters /, \, . (period), spaces, or ASCII control characters. However, GLib's client-side code accepts this value verbatim and uses it to construct a filesystem path via g_build_filename(). A malicious D-Bus server can supply a cookie_context containing path traversal sequences such as ../.target_file, causing the client to read an arbitrary file outside the ~/.dbus-keyrings/ directory. The file contents (specifically the third space-separated token of the first matching line) are then incorporated into a SHA1 hash computation and sent back to the server as part of the authentication response. The server can verify guessed file contents against this SHA1 hash, enabling data exfiltration.
Comment 3 errata-xmlrpc 2026-08-03 01:47:16 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:49512 https://access.redhat.com/errata/RHSA-2026:49512
Comment 4 errata-xmlrpc 2026-08-17 05:48:53 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:55440 https://access.redhat.com/errata/RHSA-2026:55440
Comment 5 errata-xmlrpc 2026-08-19 16:42:04 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:57015 https://access.redhat.com/errata/RHSA-2026:57015
Comment 6 errata-xmlrpc 2026-08-31 19:29:26 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:61766 https://access.redhat.com/errata/RHSA-2026:61766
Comment 7 errata-xmlrpc 2026-09-09 02:26:59 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
  Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On

Via RHSA-2026:65762 https://access.redhat.com/errata/RHSA-2026:65762
Comment 8 errata-xmlrpc 2026-09-09 02:59:31 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
  Red Hat Enterprise Linux 8.8 Telecommunications Update Service

Via RHSA-2026:65771 https://access.redhat.com/errata/RHSA-2026:65771
Comment 9 errata-xmlrpc 2026-09-09 02:59:47 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

Via RHSA-2026:65767 https://access.redhat.com/errata/RHSA-2026:65767
Comment 10 errata-xmlrpc 2026-09-09 03:04:27 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
  Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On

Via RHSA-2026:65769 https://access.redhat.com/errata/RHSA-2026:65769
Comment 11 errata-xmlrpc 2026-09-09 03:09:52 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2026:65763 https://access.redhat.com/errata/RHSA-2026:65763
Comment 12 errata-xmlrpc 2026-09-09 03:15:01 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7 Extended Lifecycle Support

Via RHSA-2026:65773 https://access.redhat.com/errata/RHSA-2026:65773
Comment 13 errata-xmlrpc 2026-09-09 03:27:25 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

Via RHSA-2026:65768 https://access.redhat.com/errata/RHSA-2026:65768
Comment 14 errata-xmlrpc 2026-09-09 03:28:33 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions

Via RHSA-2026:65770 https://access.redhat.com/errata/RHSA-2026:65770
Comment 15 Jon Orris 2026-09-15 09:19:17 UTC 
This issue has been addressed in the following products:

  Red Hat OpenShift Container Platform 4.22

Via RHSA-2026:66357 https://access.redhat.com/errata/RHSA-2026:66357
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