CVE search · CVE-2026-115506
CVE-2026-115506
high 8.7
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.
Details
- Status
- Analyzed
- Published
- Last changed
- Source
- disclosure@vulncheck.com
- Weakness
- CWE-776
Severity
| Version | Score | Vector | Source |
|---|---|---|---|
| CVSS 4.0 | high 8.7 | 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 |
disclosure@vulncheck.comSecondary |
| CVSS 3.1 | high 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
disclosure@vulncheck.comSecondary |
Affected products
Vendor and product from the NVD’s CPE applicability statements. Versions and conditions are on the NVD’s page.
- libexpat_project · libexpat
References
- https://github.com/hannob/lolololPatch
- https://github.com/libexpat/libexpatProduct
- https://github.com/libexpat/libexpat/issues/1160Issue TrackingVendor Advisory
- https://github.com/libexpat/libexpat/pull/1433Patch
- https://www.vulncheck.com/advisories/libexpat-through-2.9.0-denial-of-service-via-billion-laughs-detection-delayPatchThird Party Advisory