synced 11 MIN AGO
01 Record

CVE-2026-63686

Apache HTTP Server: mod_xml2enc crash on charset conversion failure

HighPUBLISHEDCNA: apache
CNA base score7.5 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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02 Description

Apache HTTP Server: mod_xml2enc crash on charset conversion failure

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.
  • AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
  • Technical ImpactpartialSuccessful exploitation gives limited 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
0.46% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 39.6% of scored records. A rank, not a probability.
NVD base score
7.5 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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 16:20Z27 DAYS AGO
Last updated
2026-10-01 20:09Z27 DAYS AGO
Reserved
2026-07-17
Assigning CNA
apache
Record state
PUBLISHED
Severity
High (CVSS 7.5)
CNA CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weaknesses
  • CWE-476NULL Pointer DereferenceBase
Data version
5.2
Document digest
d4a1a9d7e2c36cef3651a681ae029cb4000831cda153c7df492fe10f6987e179

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.