CVSS 3.1
7.3 highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:LCVE-2026-86143
High (7.3) in xmlsoft libxml2. EPSS 0.2% chance of exploitation in the next 30 days.
In xmlIO in libxml2 before 2.15.4, an inconsistency in xmlOutputWriteCallback and xmlBufUse causes negative lengths to reach write callbacks, aka a lack of a check for integer overflow before calling writecallback. This has security relevance for many types of uses of that length value within a callback.
Severity
- EPSS
- 0.2% chance of exploitation in the next 30 days; higher than 9% of CVEs (scores of 2026-10-31)
- CWE
- CWE-192
- Published
- Modified
- Record from
- the NVD, synced
Affected
- xmlsoft:libxml2