CVE-2026-56131

MEDIUM EPSS 1.2%
Published Jun 19, 20261w ago · Modified Jun 23, 20261w ago
4.9 CVSS 3.1
Medium
Find Similar
Published Jun 19, 2026 1w ago
Last Modified Jun 23, 2026 1w ago

Description

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).

CVSS Details

Base Score
4.9
Exploitability
1.4
Impact
3.4
Vector string
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
Attack Vector Local
Attack Complexity High
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Low
Integrity Low
Availability Low

Threat Intelligence

EPSS Exploit Probability
1.2% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-416 Use After Free Memory Safety

Affected Products 1

VendorProductVersionRange
libexpat_projectlibexpat* <2.8.2

References 1

  • github.com https://github.com/libexpat/libexpat/pull/1267
    Patch

Remediation

  • github.com https://github.com/libexpat/libexpat/pull/1267
    Patch