CVE-2026-56406

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 XML_ParseBuffer because it lacked a check that was present in XML_Parse.

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/1255
    PatchIssue Tracking

Remediation

  • github.com https://github.com/libexpat/libexpat/pull/1255
    PatchIssue Tracking