CVE-2026-115506 — Vulnerability intelligence
libexpat project — libexpat
Published:
- CVSS
- 8.7
- CISA KEV
- Not listed; not proof of no exploitation
Original source text (not a translation)
libexpat through 2.9.0 contains a denial of service vulnerability because billion laughs protection in accountingDiffTolerated() in xmlparse.c detects entity amplification too late. Attackers can supply a moderately sized XML document with a large DTD and nested entity expansions to consume tens of seconds of CPU per parse.