What’s Vulnerable › Vulnerabilities

CVE-2026-86469: Glib2: toctou symlink race in `g_file_create_replace_destination` fallback path

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-07 · updated 2026-09-08
• Weakness: CWE-59

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.

Affected products

• Red Hat OpenShift Container Platform 4.18: all versions
• Red Hat Enterprise Linux 10: all versions
• Red Hat Enterprise Linux 6: all versions
• Red Hat Enterprise Linux 7: all versions
• Red Hat Enterprise Linux 8: all versions
• Red Hat Enterprise Linux 9: all versions
• Red Hat Hardened Images: all versions

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

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