Vulnerability DatabaseCVE-2025-49506
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CVE-2025-49506
Published:August 06, 2026
Updated:September 01, 2026
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.
Affected Packages
https://github.com/apache/apr-util.git (GITHUB):
Affected version(s) >=1.5.0 <1.6.4
Fix Suggestion:
Update to version 1.6.4
Related Resources (4)
https://nvd.nist.gov/vuln/detail/CVE-2025-49506
https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/49xxx/CVE-2025-49506.json
https://lists.apache.org/thread/2v8o3bj9pb7lfcr57bdnjg9xfkj04mg5
http://www.openwall.com/lists/oss-security/2026/08/06/8
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CVSS v4
Base Score:
8.7
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
NONE
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Weakness Type (CWE)
Observable Timing Discrepancy
CWE-208
EPSS
Base Score:
0.38