CVE-2026-56412

MEDIUM EPSS 1.3%
Published Jun 21, 20261w ago · Modified Jun 23, 20261w ago
5.9 CVSS 3.1
Medium
Find Similar
Published Jun 21, 2026 1w ago
Last Modified Jun 23, 2026 1w ago

Description

libexpat before 2.8.2 does not consider XML_TOK_DATA_CHARS in doCdataSection and thus lacks handler call depth tracking for various calls from within handlers in cases of a policy violation. Thus, a use-after-free can occur. NOTE: this issue exists because of an incomplete fix for CVE-2026-50219.

CVSS Details

Base Score
5.9
Exploitability
2.5
Impact
3.4
Vector string
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Attack Vector Local
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Low
Integrity Low
Availability Low

Threat Intelligence

EPSS Exploit Probability
1.3% 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/1278
    PatchIssue Tracking

Remediation

  • github.com https://github.com/libexpat/libexpat/pull/1278
    PatchIssue Tracking