CVE•Published 2026-10-20•Modified 2026-10-21•0 articles on news•4 live references•NVD data

CVE-2026-112937Tox-dev · Filelock

Vulnerability data via NVD (ingested)

CVSS v3.1

6.1

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L

EPSS percentile

—

Weaknesses (CWE)

CWE-367Time-of-check Time-of-use (TOCTOU) Race Condition

Description

filelock is a platform-independent file lock for Python. From 4.1.0 until 4.2.1, ReadWriteLock can remove a randomized .filelock-* private-hard-link directory during cleanup, allowing another local user with rename access in a non-sticky parent to observe a live name or forge a dead-owner sweep name and rename a sibling directory onto it for deletion. This issue is fixed in version 4.2.1.

Timeline

Published 2026-10-20

Modified 2026-10-21

External references

NVD MITRE GitHub PoC VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag0 hosts

vuln:CVE-2026-112937

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · product

product:"Tox-dev Filelock"

All exposed Tox-dev Filelock instances — cross-reference with the CVE's affected-version range.

Shodan · banner/body mention

http.html:"Filelock"

HTTP body or banner mentions "Filelock" — catches deploys Shodan didn't identify as a product.

More intel sources (5)

Shodan report

vuln:CVE-2026-112937