Search/CVE-2026-56131
● CVE — Medium

CVE-2026-56131

Vendorlibexpat projectProductlibexpatDiscoveredJun 19, 2026UpdatedOct 26, 2026

libexpat before 2.8.2 lacks handler call depth tracking for calls to XML_ResumeParser from within handlers in cases of a policy violation. Thus, a use-after-free can occur (similar to the CVE-2026-50219 situation).

View graph Watch Export
CVSS v3.1
4.9 MEDIUM
EPSS
0.18%
probability of exploitation in 30 days
CISA KEV
Not listed
no confirmed exploitation reported
News coverage
1
sources referencing this CVE
Related IOCs
0
seen in the same coverage
Intelligence Reports1
1 intelligence report available

Curated threat research and citations from CrowdStrike, Mandiant, Microsoft, and other sources — unlock with Premium.

Upgrade to Premium
EPSS Trend
Aug 22, 2026 → Sep 28, 2026
● 0.01pp
0.18% → 0.18% over 4 tracked changes
CVSS v3.1 Detail
Attack VectorLOCAL
Attack ComplexityHIGH
Privileges RequiredNONE
User InteractionNONE
ScopeUNCHANGED
ConfidentialityLOW
IntegrityLOW
AvailabilityLOW
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
Connections
3 relationships
Timeline
disclosure → media coverage
Jun 19, 2026
Disclosure — published as a CVE record. · last revised by NVD Oct 26, 2026
Sep 24, 2026
ubuntu.com reports: USN-8813-1: Expat vulnerabilities