CVE-2026-86469CWE-59

CVE-2026-86469

Medium · published September 7, 2026

CVSS v3.1
5.3
EPSS
0%
Percentile
3.1
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.3 · MEDIUM
Vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:L
CVSS v4.0
Not supplied
EPSS
0.00141 · 3.1th percentile
Weakness
CWE-59 · Improper Link Resolution Before File Access ('Link Following')
Published
2026-09-07T20:17Z
References (5)
https://access.redhat.com/security/cve/CVE-2026-86469 · [email protected]https://bugzilla.redhat.com/show_bug.cgi?id=2473839 · [email protected]https://gitlab.gnome.org/GNOME/glib/-/blob/main/gio/glocalfileoutputstream.c · [email protected]https://gitlab.gnome.org/GNOME/glib/-/work_items/4044 · [email protected]https://gitlab.gnome.org/GNOME/glib/-/work_items/4044 · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 09 SEP 03:20Z
    EPSS moved — → 0%
    epss
  • 07 SEP 16:00Z
    Glib2: toctou symlink race in `g_file_create_replace_destination` fallback path
    cvelistv5