CVE•Published 2026-10-20•Modified 2026-10-28•0 articles on news•3 live references•NVD data

CVE-2026-112935Tox-dev · Filelock

Vulnerability data via NVD (ingested)

CVSS v3.1

4.7

MEDIUM

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

EPSS percentile

Exploit Prediction Scoring System · top 99% of all CVEs

Weaknesses (CWE)

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

Description

filelock is a platform-independent file lock for Python. From 3.22.0 until 4.2.1, SoftFileLock can break a stale marker after an attacker frees its own marker following the stale read, an honest contender creates a live successor on the reused inode, and the successor's modification time is not newer than the saved observation, causing the live marker to be removed and two holders to be admitted. This issue is fixed in version 4.2.1.

Timeline

Published 2026-10-20

Modified 2026-10-28

External references

NVD MITRE 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-2026-112935

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-2026-112935