Vulnerability in Apache Apr-Util
CVE-2025-49506
APR-util versions 1.6.3 (and earlier) function apr_password_validate() was not constant-time with regards to hashes or passwords comparisons, potentially leaking their content via a side channel timing attack particularly on platforms without crypt() such as Windows, BeOS, NetWare, or Android. Users are recommended to upgrade to version 1.6.4, which fixes this issue.
EPSS: 0.004 (31.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
Affected products
- Apache Apr-util
- Apache Software Foundation Portable Runtime Utility — versions 1.2.0
Weakness classification (CWE)
References
- security@apache.org (vendor-advisory, Mailing List, Vendor Advisory)
- af854a3a-2127-422b-91ae-364da2661108 (Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2025-49506?
- CVE-2025-49506 is a high-severity vulnerability in Apache Apr-Util, classified under CWE-208. CVSS score: 7.5/10. Published 2026-08-06.
- How severe is CVE-2025-49506?
- High severity. CVSS v3 base score is 7.5 out of 10.