CVE-2026-86469

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.

  • Published Sep 7, 2026
  • CVSS 5.3 medium
  • 0.1% chance of exploitation in the next 30 days (EPSS)

Affected software

CVE-2026-86469 at the National Vulnerability Database