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01 Record

CVE-2026-73636

Apache HTTP Server: mod_auth_digest one-time-nonce replay attack

HighPUBLISHEDCNA: apache
CNA base score8.1 CVSS v3.xCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
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02 Description

Apache HTTP Server: mod_auth_digest one-time-nonce replay attack

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
  • Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
0.39% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 33.6% of scored records. A rank, not a probability.
NVD base score
8.1 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD analysis status
Analyzed. NVD last modified this record on 2026-10-05.
Red Hat severity
Important. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2026-10-01 16:17Z28 DAYS AGO
Last updated
2026-10-01 20:09Z27 DAYS AGO
Reserved
2026-08-13
Assigning CNA
apache
Record state
PUBLISHED
Severity
High (CVSS 8.1)
CNA CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Weaknesses
  • CWE-294Authentication Bypass by Capture-replayBase
Data version
5.2
Document digest
d37f09de60fb424d9c093ae2a013b95d157f7009ba9312952c475d7586bdfa64

05 Affected products

VendorProductVersionsPlatforms
Apache Software FoundationApache HTTP Server2.4.0 to 2.4.68—

06 References

07 Fixed in

AlmaLinux 9

  • httpd
    Fixed in 2.4.62-13.el9_8.9
  • httpd-core
    Fixed in 2.4.62-13.el9_8.9
  • httpd-devel
    Fixed in 2.4.62-13.el9_8.9
  • httpd-filesystem
    Fixed in 2.4.62-13.el9_8.9
  • httpd-manual
    Fixed in 2.4.62-13.el9_8.9
  • httpd-tools
    Fixed in 2.4.62-13.el9_8.9
  • mod_ldap
    Fixed in 2.4.62-13.el9_8.9
  • mod_lua
    Fixed in 2.4.62-13.el9_8.9
  • mod_proxy_html
    Fixed in 1:2.4.62-13.el9_8.9
  • mod_session
    Fixed in 2.4.62-13.el9_8.9
  • mod_ssl
    Fixed in 1:2.4.62-13.el9_8.9

Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

AlmaLinux 10

  • httpd
    Fixed in 2.4.63-13.el10_2.8
  • httpd-core
    Fixed in 2.4.63-13.el10_2.8
  • httpd-devel
    Fixed in 2.4.63-13.el10_2.8
  • httpd-filesystem
    Fixed in 2.4.63-13.el10_2.8
  • httpd-manual
    Fixed in 2.4.63-13.el10_2.8
  • httpd-tools
    Fixed in 2.4.63-13.el10_2.8
  • mod_ldap
    Fixed in 2.4.63-13.el10_2.8
  • mod_lua
    Fixed in 2.4.63-13.el10_2.8
  • mod_proxy_html
    Fixed in 1:2.4.63-13.el10_2.8
  • mod_session
    Fixed in 2.4.63-13.el10_2.8
  • mod_ssl
    Fixed in 1:2.4.63-13.el10_2.8

Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

CloudLinux 9

  • httpd
    Fixed in 2.4.62-13.el9_8.9
  • httpd-core
    Fixed in 2.4.62-13.el9_8.9
  • httpd-devel
    Fixed in 2.4.62-13.el9_8.9
  • httpd-filesystem
    Fixed in 2.4.62-13.el9_8.9
  • httpd-manual
    Fixed in 2.4.62-13.el9_8.9
  • httpd-tools
    Fixed in 2.4.62-13.el9_8.9
  • mod_ldap
    Fixed in 2.4.62-13.el9_8.9
  • mod_lua
    Fixed in 2.4.62-13.el9_8.9
  • mod_proxy_html
    Fixed in 1:2.4.62-13.el9_8.9
  • mod_session
    Fixed in 2.4.62-13.el9_8.9
  • mod_ssl
    Fixed in 1:2.4.62-13.el9_8.9

Derived from AlmaLinux 9. Partial coverage: only packages taken from AlmaLinux 9 are listed.

Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

CloudLinux 10

  • httpd
    Fixed in 2.4.63-13.el10_2.8
  • httpd-core
    Fixed in 2.4.63-13.el10_2.8
  • httpd-devel
    Fixed in 2.4.63-13.el10_2.8
  • httpd-filesystem
    Fixed in 2.4.63-13.el10_2.8
  • httpd-manual
    Fixed in 2.4.63-13.el10_2.8
  • httpd-tools
    Fixed in 2.4.63-13.el10_2.8
  • mod_ldap
    Fixed in 2.4.63-13.el10_2.8
  • mod_lua
    Fixed in 2.4.63-13.el10_2.8
  • mod_proxy_html
    Fixed in 1:2.4.63-13.el10_2.8
  • mod_session
    Fixed in 2.4.63-13.el10_2.8
  • mod_ssl
    Fixed in 1:2.4.63-13.el10_2.8

Derived from AlmaLinux 10. Partial coverage: only packages taken from AlmaLinux 10 are listed.

Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

Debian 12

  • apache2
    No fix yet

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

  • apache2
    Fixed in 2.4.69-1~deb13u1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

  • apache2
    Fixed in 2.4.69-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 22.04 LTS

  • apache2
    Fixed in 2.4.52-1ubuntu4.25

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 24.04 LTS

  • apache2
    Fixed in 2.4.58-1ubuntu8.17

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 26.04 LTS

  • apache2
    Fixed in 2.4.66-2ubuntu2.6

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 26.10

  • apache2
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 14.04 LTS

  • apache2
    Fixed in 2.4.7-1ubuntu4.22+esm17
    Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 16.04 LTS

  • apache2
    Fixed in 2.4.18-2ubuntu3.17+esm22
    Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 18.04 LTS

  • apache2
    Fixed in 2.4.29-1ubuntu4.27+esm13
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 20.04 LTS

  • apache2
    Fixed in 2.4.41-4ubuntu3.23+esm9
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.