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CVE PROGRAM SOURCE RECORD8.7 High

CVE-2026-115506

libexpat through 2.9.0 Denial of Service via Billion Laughs Detection Delay

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

libexpat libexpat

Default version status: unaffected

  • 0 to ≤ 2.9.0affected
pkg:github/libexpat/libexpat

References