Dashboard / CVE-2026-41991

CVE-2026-41991

LOW
INFO Priority: 0.00 BB Relevance: 19/100
Published: 2026-06-29 Modified: 2026-10-25 First seen: 2026-10-29 Status: active

Attack Surface

No Auth

CVSS Vector Breakdown

AV: Local
AC: High
PR: None
UI: Passive
S: X
AT: Present
VC: None
VI: Low
VA: None

Description

GNU gzip contains a vulnerability in the gzexe utility related to insecure temporary file handling. When the mktemp utility is not available in the user’s PATH, gzexe falls back to constructing a temporary file path based solely on the process ID (PID). This predictable filename is created without exclusive access or existence checks. A local attacker can pre‑create the predicted temporary file path as a symbolic link pointing to an arbitrary file writable by the victim. When gzexe runs, it follows the symlink and overwrites the target file, resulting in a time‑of‑check to time‑of‑use (TOCTOU) condition that allows arbitrary file overwrite. This issue has been fixed in the commit 4e6f8b24ab823146ab8776f0b7fe486ab34d4269

Weakness Classification (1)

Affected Software (1)

VendorProductVersion
gnu gzip < 1.14

References & Advisories (3)

Bug Bounty Relevance

19 / 100
✓ No authentication

CVSS Score

2.0 / 10.0 v4.0
CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS — Exploitation Probability

0.12%
Raw Score 0.001170
Percentile 1.7%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00117
2026-10-28
0.00117

Intelligence Sources

nvd ref →

External Links