What’s Vulnerable › Vulnerabilities

CVE-2026-112056: wvWare wv through 1.2.9 Heap Out-of-Bounds Read via wvGetSTSH

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-18 · updated 2026-10-19
• Weakness: CWE-125

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 products

• wvWare wv: through 1.2.9

References

• https://github.com/AbiWord/wv/blob/wv-1-2-9/stylesheet.c#L447
• https://hackmd.io/@haindpwn/wv-fkp-crun-stsh-cstd-oob-read
• https://www.vulncheck.com/advisories/wvware-wv-through-1.2.9-heap-out-of-bounds-read-via-wvgetstsh

Get alerted when CVE-2026-112056 or the next vulnerability affects your stack