CVE-2026-56407

MEDIUM EPSS 1.1%
Published Jun 21, 20261w ago · Modified Jun 23, 20261w ago
6.9 CVSS 3.1
Medium
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Published Jun 21, 2026 1w ago
Last Modified Jun 23, 2026 1w ago

Description

libexpat before 2.8.2 has an integer overflow in doProlog that is related to storeEntityValue and entity textLen.

CVSS Details

Base Score
6.9
Exploitability
1.4
Impact
5.5
Vector string
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L
Attack Vector Local
Attack Complexity High
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability Low

Threat Intelligence

EPSS Exploit Probability
1.1% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-190 Integer Overflow or Wraparound Numeric Error

Affected Products 1

VendorProductVersionRange
libexpat_projectlibexpat* <2.8.2

References 1

  • github.com https://github.com/libexpat/libexpat/pull/1262
    PatchIssue Tracking

Remediation

  • github.com https://github.com/libexpat/libexpat/pull/1262
    PatchIssue Tracking