What’s Vulnerable › Vulnerabilities

CVE-2026-112055: wvWare wv through 1.2.9 Stack Out-of-Bounds Read via wvGetPAPX_FKP and wvGetCHPX_FKP

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% 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 stack-based out-of-bounds read vulnerability in wvGetPAPX_FKP and wvGetCHPX_FKP caused by an unvalidated FKP run count. Attackers can supply a crafted .doc file with a large crun value to read kilobytes past the 512-byte stack buffer, crashing applications like AbiWord.

Affected products

• wvWare wv: through 1.2.9

References

• https://github.com/AbiWord/wv/blob/wv-1-2-9/fkp.c#L122
• https://hackmd.io/@haindpwn/wv-fkp-crun-stsh-cstd-oob-read
• https://www.vulncheck.com/advisories/wvware-wv-through-1.2.9-stack-out-of-bounds-read-via-wvgetpapx-fkp-and-wvgetchpx-fkp
• https://hackmd.io/@haindpwn/wv-fkp-crun-stsh-cstd-oob-read

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