Vulnerability · Published Oct 18, 2026 · Assigned by VulnCheck
CVE-2026-112056wvWare wv through 1.2.9 Heap Out-of-Bounds Read via wvGetSTSH
Medium 5.5
In plain English
A medium-severity out-of-bounds read in wv from wvWare. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 2% of all known vulnerabilities).
Severity (CVSS 3.1)5.5Medium
Exploit odds (30 days)0.1%top 98.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | wv | no fix listed | DEBIAN-CVE-2026-112056 |
| Debian:13 | wv | no fix listed | DEBIAN-CVE-2026-112056 |
| Ubuntu:22.04:LTS | wv | no fix listed | UBUNTU-CVE-2026-112056 |
| Ubuntu:24.04:LTS | wv | no fix listed | UBUNTU-CVE-2026-112056 |
| Ubuntu:26.04:LTS | wv | no fix listed | UBUNTU-CVE-2026-112056 |
| Ubuntu:26.10 | wv | no fix listed | UBUNTU-CVE-2026-112056 |
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
- https://hackmd.io/@haindpwn/wv-fkp-crun-stsh-cstd-oob-read third-party-advisory
- https://github.com/AbiWord/wv/blob/wv-1-2-9/stylesheet.c#L447 technical-description
- VulnCheck Advisory: wvWare wv through 1.2.9 Heap Out-of-Bounds Read via wvGetSTSH third-party-advisory