CVE-2026-115506
HIGH
NVD
CVSS Score
7.5
Severity
HIGH
Published
Oct 22, 2026
Vendor
unknown
Description
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.