CVE-2026-86469Glib2: toctou symlink race in `g_file_create_replace_destination` fallback path
Updated under an hour ago ()
Does this affect you?
It affects Red Hat Enterprise Linux 10 and 2 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 5.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:L
- Weakness (CWE)
- CWE-59
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- redhat
- NVD analysis
- Awaiting Analysis
- Record last updated
- Sep 8, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Red Hat Red Hat Enterprise Linux 10 redhat:enterprise_linux | 10 | CNA record |
Red Hat Red Hat Hardened Images redhat:hummingbird | 1 | CNA record |
Red Hat Red Hat OpenShift Container Platform 4 redhat:openshift | 4 | CNA record |
References
- https://access.redhat.com/security/cve/CVE-2026-86469vdb-entry, x-refsource-redhat
- https://bugzilla.redhat.com/show_bug.cgi?id=2473839issue-tracking, x-refsource-redhat
- https://gitlab.gnome.org/GNOME/glib/-/blob/main/gio/glocalfileoutputstream.c
- https://gitlab.gnome.org/GNOME/glib/-/work_items/4044
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.