Disclosure summary
libexpat before 2.7.5 allows an infinite loop while parsing DTD content.
Source-reported weakness categories
CWE-835
Source-specific records & product guidance
Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.
Microsoft Security Updates (CVRF) · 2026-Mar
Open original source · Updated Sep 24, 2026
libexpat before 2.7.5 allows an infinite loop while parsing DTD content.
Maximum of vendor-reported product scores; products and fixed builds are associations, not a universal affected-version statement.
Microsoft maximum product score: 4
| Vendor | Product / association | Version / bounds |
|---|---|---|
| Microsoft update guide | azl3 expat 2.6.4-4 on Azure Linux 3.0 | (MSRC status code 3) |
| Microsoft update guide | cbl2 expat 2.6.4-4 on CBL Mariner 2.0 | (MSRC status code 3) |
| Microsoft update guide | azl3 cmake 3.30.3-12 on Azure Linux 3.0 | (MSRC status code 3) |
| Microsoft update guide | azl3 python3 3.12.9-9 on Azure Linux 3.0 | (MSRC status code 3) |
| Microsoft update guide | cbl2 cmake 3.21.4-21 on CBL Mariner 2.0 | (MSRC status code 3) |
| Microsoft update guide | azl3 expat 2.6.4-5 on Azure Linux 3.0 | (MSRC status code 3) |
| Microsoft update guide | cbl2 expat 2.6.4-4 on CBL-Mariner 2.0 | (MSRC status code 3) |
Vendor remediation references
- CBL-Mariner Releases · build 2.6.4-5 · product IDs 20922-17084, 20943-17086, 21204-17084
- Vendor guidance · product IDs 20922-17084, 20943-17086, 21204-17084
- Release Notes · build 2.6.4-5 · product IDs 20943-21692
- Vendor guidance · product IDs 20943-21692
Original records & references
- NIST NVD record
- CVE Program record
- msrc.microsoft.com — Vendor advisory
PUBLISHED 2026-03-16T21:01:33-04:00
MODIFIED 2026-09-24T21:58:52-04:00
INGESTED 2026-10-08T12:45:09-04:00