libexpat before 2.8.3 has an out-of-bounds read and resultant infinite loop because low surrogates are treated the same as high surrogates during Unicode processing in the *_toUtf16 functions.
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Thu, 13 Aug 2026 15:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 12 Aug 2026 00:15:00 +0000

Type Values Removed Values Added
Title expat: libexpat: Denial of Service due to incorrect Unicode surrogate handling
References
Metrics threat_severity

None

threat_severity

Moderate


Tue, 11 Aug 2026 18:30:00 +0000

Type Values Removed Values Added
References

Mon, 10 Aug 2026 03:45:00 +0000

Type Values Removed Values Added
Description libexpat before 2.8.3 has an out-of-bounds read and resultant infinite loop because low surrogates are treated the same as high surrogates during Unicode processing in the *_toUtf16 functions.
First Time appeared Libexpat Project
Libexpat Project libexpat
Weaknesses CWE-125
CPEs cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:*
Vendors & Products Libexpat Project
Libexpat Project libexpat
References
Metrics cvssV3_1

{'score': 6.2, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}


Projects

Sign in to view the affected projects.

cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-08-13T14:08:42.155Z

Reserved: 2026-08-10T03:28:03.899Z

Link: CVE-2026-72522

cve-icon Vulnrichment

Updated: 2026-08-11T17:20:04.291Z

cve-icon NVD

Status : Received

Published: 2026-08-10T04:16:50.910

Modified: 2026-08-13T15:20:03.200

Link: CVE-2026-72522

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-08-10T03:28:04Z

Links: CVE-2026-72522 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-08-10T04:30:11Z

Weaknesses