CVE-2026-12345Published

Race condition in tempfile.TemporaryDirectory cleanup allows deleting files outside the temporary directory

Exact source revision recorded 26 Oct 2026 02:35:10 UTC. It does not establish the source's current position. Latest evidence.

Recorded JSON

cve-program · CVE-2026-12345

Published

The cleanup of tempfile.TemporaryDirectory is vulnerable to a race condition. An attacker who can modify the tree during cleanup can replace a directory with a symbolic link, causing files outside of the temporary directory to be deleted or have their permissions and file flags reset, with the privileges of the process performing the cleanup. Note that platforms where shutil.rmtree.avoids_symlink_attacks is false, remain affected, and file flags may still be reset outside of the tree on all platforms.

Source published: 29 Sep 2026 17:46:01 UTC
Source modified: 26 Oct 2026 00:36:23 UTC
Observed here: 26 Oct 2026 02:35:10 UTC
Source terms: CVE Program Terms of Use

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CVSS 4.0 · 5.9 CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N