CVE-2026-86469

EUVD-2026-72488
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.
Link Following
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
5.3 MEDIUM
LOCAL
HIGH
LOW
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:L
Awaiting analysis
This vulnerability is currently awaiting analysis.
Base Score
CVSS 3.x
EPSS Score
Percentile: 3.1%
Debian logo
Debian Releases
Debian Product
Codename
glib2.0
bookworm
postponed
bookworm (security)
vulnerable
forky
vulnerable
sid
vulnerable
trixie
no-dsa
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
glib2.0
bionic
needs-triage
focal
needs-triage
jammy
needs-triage
noble
needs-triage
resolute
needs-triage
trusty
needs-triage
xenial
needs-triage
Common Weakness Enumeration
References
https://access.redhat.com/security/cve/CVE-2026-86469
https://bugzilla.redhat.com/show_bug.cgi?id=2473839
https://gitlab.gnome.org/GNOME/glib/-/blob/main/gio/glocalfileoutputstream.c
https://gitlab.gnome.org/GNOME/glib/-/work_items/4044
https://gitlab.gnome.org/GNOME/glib/-/work_items/4044