HIGH 8.7 NVD
CVE-2026-115506
libexpat through 2.9.0 contains a denial of service vulnerability because billion laughs protection in accountingDiffTolerated() in xmlparse.c detects entity am
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.
References
- https://github.com/hannob/lololol
- https://github.com/libexpat/libexpat
- https://github.com/libexpat/libexpat/issues/1160
- https://github.com/libexpat/libexpat/pull/1433
- https://www.vulncheck.com/advisories/libexpat-through-2.9.0-denial-of-service-via-billion-
This high severity vulnerability with a CVSS score of 8.7 was published on 2026-10-22 via NVD.
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