Medium severity6.9NVD Advisory· Published Jun 21, 2026· Updated Jun 23, 2026
CVE-2026-56411
CVE-2026-56411
Description
xmlwf in libexpat before 2.8.2 has an integer overflow in endDoctypeDecl via NOTATION declarations.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
7- Range: <2.8.2
- osv-coords6 versionspkg:apk/chainguard/expatpkg:apk/chainguard/expat-devpkg:apk/chainguard/libexpat1pkg:apk/wolfi/expatpkg:apk/wolfi/expat-devpkg:apk/wolfi/libexpat1
< 2.8.2-r0+ 5 more
- (no CPE)range: < 2.8.2-r0
- (no CPE)range: < 2.8.2-r0
- (no CPE)range: < 2.8.2-r0
- (no CPE)range: < 2.8.2-r0
- (no CPE)range: < 2.8.2-r0
- (no CPE)range: < 2.8.2-r0
Patches
Vulnerability mechanics
References
1- github.com/libexpat/libexpat/pull/1263nvdPatchIssue Tracking
News mentions
1- Libexpat: Ten Integer Overflow and Use-After-Free Vulnerabilities Disclosed TogetherVypr Intelligence · Jun 21, 2026