CVE-2026-111274 unarr through 1.1.1 Heap Out-of-Bounds Read via zip_parse_extra_fields
Attackers can cause a crash or read sensitive memory by providing a crafted ZIP archive to applications using the unarr library.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-111274?
CVE-2026-111274 is a medium-severity memory corruption vulnerability in selmf unarr, published on 15 Oct 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
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.
Weakness: CWE-125
Which versions are affected by CVE-2026-111274?
How do I fix CVE-2026-111274?
No fix has been published for CVE-2026-111274 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-111274 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-111274 exists.
Sources
Also known as DEBIAN-CVE-2026-111274, GHSA-rj75-52m6-37p5, UBUNTU-CVE-2026-111274.