CVE-2026-112056 wvWare wv through 1.2.9 Heap Out-of-Bounds Read via wvGetSTSH
Attackers can crash applications using the wvWare library by supplying crafted Word documents with malformed stylesheets, causing a heap out-of-bounds read.
- 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-2026-112056?
CVE-2026-112056 is a medium-severity memory corruption vulnerability in wvWare wv, published on 18 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
wvWare wv through 1.2.9 contains a heap-based out-of-bounds read vulnerability in wvGetSTSH in stylesheet.c that allows attackers to crash applications by supplying crafted Word stylesheets. Attackers can provide a .doc file with ten or fewer styles or out-of-range style base indexes to read past heap arrays, crashing applications such as AbiWord.
Weakness: CWE-125
Which versions are affected by CVE-2026-112056?
How do I fix CVE-2026-112056?
No fix has been published for CVE-2026-112056 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-2026-112056 being exploited?
There is no known exploitation of CVE-2026-112056 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-112056, GHSA-jhv8-9974-jvpp, UBUNTU-CVE-2026-112056.