Vulnerability · Published Oct 15, 2026 · Assigned by VulnCheck
CVE-2026-111141zziplib through 0.13.80 Out-of-Bounds Read via __zzip_parse_root_directory ZIP64 Parsing
Medium 4.7
In plain English
A medium-severity out-of-bounds read in zziplib from gdraheim. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 2% of all known vulnerabilities).
Official description
zziplib through 0.13.80 contains an out-of-bounds read vulnerability in __zzip_parse_root_directory() in zzip/zip.c that allows attackers to read past the mapped central directory in mmap builds due to an ineffective bounds check. Attackers can supply a crafted ZIP whose entry name ends at the central directory end, triggering 28-byte ZIP64 extra field over-reads via zzip_dir_open() that crash the process.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | zziplib | no fix listed | DEBIAN-CVE-2026-111141 |
| Debian:13 | zziplib | no fix listed | DEBIAN-CVE-2026-111141 |
| Debian:14 | zziplib | no fix listed | DEBIAN-CVE-2026-111141 |
| Ubuntu:22.04:LTS | zziplib | no fix listed | UBUNTU-CVE-2026-111141 |
| Ubuntu:24.04:LTS | zziplib | no fix listed | UBUNTU-CVE-2026-111141 |
| Ubuntu:26.04:LTS | zziplib | no fix listed | UBUNTU-CVE-2026-111141 |
| Ubuntu:26.10 | zziplib | no fix listed | UBUNTU-CVE-2026-111141 |
Affected products (as reported)
Weakness: CWE-125 · Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H
References
- https://hackmd.io/@haind-pwn/zziplib-zip-central-directory-oob-read technical-description
- https://github.com/gdraheim/zziplib/blob/f58313c1f65f46bf73f3526d1afd4d6bb46cc4ae/zzip/zip.c#L530-L558 technical-description
- https://github.com/gdraheim/zziplib product
- VulnCheck Advisory: zziplib through 0.13.80 Out-of-Bounds Read via __zzip_parse_root_directory ZIP64 Parsing third-party-advisory