CVE-2025-49506

HighCVSS 7.5

Published: 06/08/2026(UTC)Updated: 07/08/2026(UTC)Translated: 06/08/2026(UTC)NVD NIST

Exploitation Probability (EPSS)

Low risk

0.39%

32th percentile - higher than 32% of all known CVEs

Summary

The apr_password_validate() function in APR-util versions 1.6.3 and earlier did not perform constant-time comparisons of hashes or passwords, potentially leaking their content via a side-channel timing attack, especially on platforms without crypt() such as Windows, BeOS, NetWare, or Android.

Risk Assessment

An attacker could exploit timing measurements to reconstruct passwords or hashes, leading to a breach of credential confidentiality and potential account takeover.

Recommendation

It is recommended to upgrade APR-util to version 1.6.4 or later, which fixes this issue.

Other vulnerabilities in APR-util

CVE-2026-32327Critical
A bug in APR-util version 1.6.3 and earlier allows a stack recursion attack against any library consumer which parses XML from untrusted sources and uses the apr_xml_quote_elem() function. Users are recommended to upgrade to version 1.6.4, which fixes this issue.

Original NVD description (English source)

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.