CVE Tools
Sign in

CVE-2025-49506

Apache Portable Runtime Utility: apr_password_validate() vulnerable to timing attack

Published: Aug 6, 2026Updated: Aug 7, 2026 Sources: CVE List NVDCWE-208
7.5HIGH
NVD MITRE
EPSS Score
0.4%
Top 67.8%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
Not available

Description

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:NA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:NIntegrity
None
A:NAvailability
None
Open in CVSS calculator →

Weaknesses

CWE-208

Affected Products

apache
oss-project·USaka apache httpd, apache http server
apr-util
OSS Libraries / generic-library
Apache Software Foundation
oss-project·USaka apache foundation
Apache Portable Runtime UtilityMixed
Web & CMS Plugins / cms-core

Exploitability

Official Patch Available
Is your org exposed to CVE-2025-49506?We can run the check for you — a free external exposure review, no install. Check my exposure

References

https://lists.apache.org/thread/2v8o3bj9pb7lfcr57bdnjg9xfkj04mg5
lists.apache.org
http://www.openwall.com/lists/oss-security/2026/08/06/8
openwall.com

Unlock Complete Vulnerability Intelligence

Get the full picture for CVE-2025-49506 and every CVE in our database. Create a free account — no credit card required.

Create Free Account
Plain-language analysis
Impact assessment and exploitation scenario in plain English
Attack graph visualization
Interactive attack path and kill chain mapping
Exploit details & PoC links
ExploitDB, Metasploit, GitHub PoCs with direct links
Nuclei scanner templates
Ready-to-use vulnerability scanner templates
Full remediation guide
Patch instructions, workarounds, and compliance impact
Interactive AI chat
Ask questions about this vulnerability in natural language
Related vulnerabilities
Semantically similar CVEs and attack patterns
REST API & MCP access
Integrate vulnerability data into your workflows