Vulnerability · Published Oct 15, 2026 · Assigned by VulnCheck
CVE-2026-111274unarr through 1.1.1 Heap Out-of-Bounds Read via zip_parse_extra_fields
Medium 5.5
In plain English
A medium-severity out-of-bounds read in unarr from selmf. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 9% of all known vulnerabilities).
Severity (CVSS 3.1)5.5Medium
Exploit odds (30 days)0.2%top 90.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
unarr through 1.1.1 contains a heap-based out-of-bounds read in zip_parse_extra_fields() in zip/parse-zip.c due to an incorrect ZIP64 extra field length check. Attackers can supply a crafted ZIP archive with 0xFFFFFFFF sentinel values and a truncated ZIP64 record to read past the heap buffer and crash the process.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | unarr | no fix listed | DEBIAN-CVE-2026-111274 |
| Ubuntu:22.04:LTS | unarr | no fix listed | UBUNTU-CVE-2026-111274 |
| Ubuntu:24.04:LTS | unarr | no fix listed | UBUNTU-CVE-2026-111274 |
Affected products (as reported)
Weakness: CWE-125 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
References
- GitHub Security Advisory (GHSA-qm4g-jf39-jwjj) vendor-advisory
- Release Notes release-notes, patch
- https://hackmd.io/@haind-pwn/unarr-tar-zip-oob technical-description, exploit
- VulnCheck Advisory: unarr through 1.1.1 Heap Out-of-Bounds Read via zip_parse_extra_fields third-party-advisory