CVE-2026-111151 OpenJPH through 0.32.0 Heap Out-of-Bounds Write in HTJ2K Cleanup-Pass Decoder
Attackers can trigger heap out-of-bounds writes in OpenJPH via crafted codestreams, leading to memory corruption, crashes, or potential code execution.
- 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-2026-111151?
CVE-2026-111151 is a medium-severity memory corruption vulnerability in aous72 OpenJPH, 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
OpenJPH through 0.32.0 contains a heap out-of-bounds write vulnerability in the HTJ2K cleanup-pass decoder that allows attackers to corrupt memory via one-row codeblocks. Attackers can supply a crafted .j2c or .jph codestream with small precinct sizes, causing the decoder to write a second row past the codeblock buffer, resulting in memory corruption and crashes.
Weakness: CWE-787
Which versions are affected by CVE-2026-111151?
How do I fix CVE-2026-111151?
No fix has been published for CVE-2026-111151 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-2026-111151 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-111151 exists.
Sources
Also known as DEBIAN-CVE-2026-111151, GHSA-5g7q-q9vm-h587, UBUNTU-CVE-2026-111151.