CVEvulnerability
CVE-2026-115506
8.7 HIGH
Official page ↗
- Status
- Awaiting Analysis
- Published
- 2026-10-22
- Last modified
- 2026-10-23
- Assigner
- [email protected]
- CVSS 4.0 ([email protected])
- 8.7 HIGH — CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- CVSS 3.1 ([email protected])
- 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weaknesses
- CWE-776
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.
Related
Weakness · CWE (1)
- CWE-776 Improper Restriction of Recursive Entity References in DTDs weakness
References
- https://github.com/hannob/lololol github.com
- https://github.com/libexpat/libexpat github.com
- https://github.com/libexpat/libexpat/issues/1160 github.com
- https://github.com/libexpat/libexpat/pull/1433 github.com
- https://www.vulncheck.com/advisories/libexpat-through-2.9.0-denial-of-service-via-billion-laughs-detection-delay www.vulncheck.com