Skip to content
Fencer Vulns
high 7.5

CVE-2025-49506 json

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

published 2026-08-06 3 mo ago modified 2026-09-29 41 d ago also BIT-apr-util-2025-49506 , EUVD-2025-210642

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 32%
public exploits
0
none known

Summary

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.

Patch / fix

  • bitnami apr-util 1.6.4
  • apache apr-util 1.6.4
  • apr-util Debian 12 1.6.3-1+deb12u1
  • apr-util Debian 13 1.6.3-3+deb13u1
  • apr-util Debian 14 1.6.4-1

debian advisories DEBIAN-CVE-2025-49506

  • apr-util Ubuntu 22.04 LTS 1.6.1-5ubuntu4.22.04.3
  • apr-util Ubuntu 24.04 LTS 1.6.3-1.1ubuntu7.1
  • apr-util Ubuntu 26.04 LTS 1.6.3-3ubuntu3.1
  • apr-util Ubuntu Pro 14.04 LTS 1.5.3-1ubuntu0.1~esm3
  • apr-util Ubuntu Pro 18.04 LTS 1.6.1-2ubuntu0.1+esm1
  • apr-util Ubuntu Pro 20.04 LTS 1.6.1-4ubuntu2.2+esm1

ubuntu advisories UBUNTU-CVE-2025-49506

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • apr-util RHEL 8 1.6.1-9.el8_10.1
  • apr-util-bdb RHEL 8 1.6.1-9.el8_10.1
  • apr-util-ldap RHEL 8 1.6.1-9.el8_10.1
  • apr-util-odbc RHEL 8 1.6.1-9.el8_10.1
  • apr-util-mysql RHEL 8 1.6.1-9.el8_10.1
  • apr-util-pgsql RHEL 8 1.6.1-9.el8_10.1
  • apr-util-sqlite RHEL 8 1.6.1-9.el8_10.1
  • apr-util-openssl RHEL 8 1.6.1-9.el8_10.1

red hat advisories RHSA-2026:69113RHSA-2026:66392RHSA-2026:66341RHSA-2026:58474

  • apr-util SLES for SAP 15 SP6, SLES 15 SP6-LTSS, SLE Module for Server Applications 15 SP7 +1 more 1.6.1-150600.27.3.1
  • apr-util SLES for SAP 15 SP5, SLES for SAP 15 SP4, SLES 15 SP5-LTSS +5 more 1.6.1-150300.18.8.1
  • apr-util SLES for SAP applications 16.0, SLES 16.0 1.6.3-160000.3.1
  • libapr-util1 SLES LTSS Extended Security 12 SP5, SLES 12 SP5-LTSS 1.5.3-8.22.1

suse advisories SUSE-SU-2026:3938-1SUSE-SU-2026:3937-1SUSE-SU-2026:3905-1SUSE-SU-2026:23551-1

  • apr-util openSUSE Leap 16.0 1.6.3-160000.3.1

opensuse advisories openSUSE-SU-2026:21672-1

  • apr-util AlmaLinux 8 1.6.1-9.el8_10.1
  • apr-util-bdb AlmaLinux 8 1.6.1-9.el8_10.1
  • apr-util-ldap AlmaLinux 8 1.6.1-9.el8_10.1
  • apr-util-odbc AlmaLinux 8 1.6.1-9.el8_10.1
  • apr-util-mysql AlmaLinux 8 1.6.1-9.el8_10.1
  • apr-util-pgsql AlmaLinux 8 1.6.1-9.el8_10.1
  • apr-util-sqlite AlmaLinux 8 1.6.1-9.el8_10.1
  • apr-util-openssl AlmaLinux 8 1.6.1-9.el8_10.1

almalinux advisories ALSA-2026:69113ALSA-2026:66341ALSA-2026:66392

  • apr-util Rocky Linux 8 1.6.1-9.el8_10.1
  • apr-util Rocky Linux 10 1.6.3-23.el10_2.1
  • apr-util Rocky Linux 9 1.6.1-23.el9_8.1

rocky linux advisories RLSA-2026:69113RLSA-2026:66392RLSA-2026:66341

  • apr-util Alpine 3.24, Alpine 3.23, Alpine 3.22 +1 more 1.6.4-r0

alpine advisories ALPINE-CVE-2025-49506

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • apr-util Azure Linux 3.0 1.6.3-3

azure linux advisories AZL-94628

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-49506 updated cvss 5.9

apr-util: Apache Portable Runtime Utility: Information disclosure via timing attack in password validation

  • Red Hat Enterprise Linux 6 apr-util, apr-util-ldap, apr-util-odbc, apr-util-mysql, apr-util-pgsql, apr-util-sqlite
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 7 apr-util, apr-util-nss, apr-util-ldap, apr-util-odbc, apr-util-mysql, apr-util-pgsql, +2 more
    affected: workaround, no fix available “Fix deferred”
  • Red Hat Enterprise Linux AppStream (v. 8) apr-util 1.6.1-9.el8_10.1, apr-util-bdb 1.6.1-9.el8_10.1, apr-util-ldap 1.6.1-9.el8_10.1, apr-util-odbc 1.6.1-9.el8_10.1, apr-util-mysql 1.6.1-9.el8_10.1, apr-util-pgsql 1.6.1-9.el8_10.1, +2 more
    fixed: vendor fix RHSA-2026:69113
  • Red Hat Enterprise Linux AppStream (v. 9) apr-util 1.6.1-23.el9_8.1, apr-util-bdb 1.6.1-23.el9_8.1, apr-util-ldap 1.6.1-23.el9_8.1, apr-util-odbc 1.6.1-23.el9_8.1, apr-util-mysql 1.6.1-23.el9_8.1, apr-util-pgsql 1.6.1-23.el9_8.1, +2 more
    fixed: vendor fix RHSA-2026:66341
  • Red Hat Enterprise Linux AppStream (v. 10) apr-util 1.6.3-23.el10_2.1, apr-util-ldap 1.6.3-23.el10_2.1, apr-util-lmdb 1.6.3-23.el10_2.1, apr-util-odbc 1.6.3-23.el10_2.1, apr-util-mysql 1.6.3-23.el10_2.1, apr-util-pgsql 1.6.3-23.el10_2.1, +2 more
    fixed: vendor fix RHSA-2026:66392
  • Red Hat Hardened Images apr-util 1.6.5-1.hum1, apr-util-ldap 1.6.5-1.hum1, apr-util-lmdb 1.6.5-1.hum1, apr-util-odbc 1.6.5-1.hum1, apr-util-mysql 1.6.5-1.hum1, apr-util-pgsql 1.6.5-1.hum1, +2 more
    fixed: vendor fix RHSA-2026:58474

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
3 mo ago

Exploit prediction

0.38% chance of exploitation in the next 30 days, higher than 32% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
OSV 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected packages

ecosystem package affected fixed in
bitnami apr-util
>=1.2.0, <1.6.4
1.6.4

Affected products

  • Apache Software Foundation Apache Portable Runtime Utility

Classification

Weakness
  • CWE-208 Observable Timing Discrepancy

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.