A flaw was found in GLib2. When g_file_replace() is used with G_FILE_CREATE_REPLACE_DESTINATION and creating the .goutputstream-XXXXXX temporary file fails, the library unlinks the destination and recreates it without exclusive creation or symlink protection. A local attacker who can write to the destination directory can win that race and redirect the write to another file.
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.


Workaround

Do not use g_file_replace(..., G_FILE_CREATE_REPLACE_DESTINATION) on paths in directories writable by less-privileged users.

History

Mon, 07 Sep 2026 16:15:00 +0000

Type Values Removed Values Added
Description A flaw was found in GLib2. When g_file_replace() is used with G_FILE_CREATE_REPLACE_DESTINATION and creating the .goutputstream-XXXXXX temporary file fails, the library unlinks the destination and recreates it without exclusive creation or symlink protection. A local attacker who can write to the destination directory can win that race and redirect the write to another file.
Title Glib2: toctou symlink race in `g_file_create_replace_destination` fallback path
First Time appeared Redhat
Redhat enterprise Linux
Redhat hummingbird
Redhat openshift
Weaknesses CWE-59
CPEs cpe:/a:redhat:hummingbird:1
cpe:/a:redhat:openshift:4
cpe:/o:redhat:enterprise_linux:10
cpe:/o:redhat:enterprise_linux:6
cpe:/o:redhat:enterprise_linux:7
cpe:/o:redhat:enterprise_linux:8
cpe:/o:redhat:enterprise_linux:9
Vendors & Products Redhat
Redhat enterprise Linux
Redhat hummingbird
Redhat openshift
References
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:L'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-09-07T16:00:13.925Z

Reserved: 2026-09-07T14:38:45.692Z

Link: CVE-2026-86469

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-09-07T16:17:30.713

Modified: 2026-09-07T16:17:30.713

Link: CVE-2026-86469

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-07T18:45:17Z

Weaknesses