CVE-2025-49506: Apache Portable Runtime Utility: apr_password_validate() vulnerable to timing attack
Published Aug 6, 2026
·Updated
APR-util versions 1.6.3 (and earlier) function aprpasswordvalidate() 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.
Affected Software
1 affected component
Apache APR-util<=1.6.3
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Apache Portable Runtime Utility (APR-util)to a version that resolves this vulnerability.Fixed in 1.6.4
Event History
Aug 6, 2026
CVE Published
via MITRE·02:33 PM
Data Sourced
via MITRE·02:33 PM
DescriptionWeakness