CVE-2026-63686
CVE-2026-63686: 2 tracked advisory records across Apache, Red Hat. Compare vendor sources and published fix guidance.
Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.
Vendor advisory comparison
Apache
1 advisory- Advisory severityHigh7.5
High [CVE-2026-63686] NULL pointer dereference in mod_xml2enc in Apache Software Foundation Apache HTTP Server before 2.4.69 on all platforms allows an untrusted backend server to cause a denial of service via a proxied response with a charset whose conversion partially succeeds then fails
CVE-2026-63686Source published Source updated
A NULL pointer dereference in mod_xml2enc in Apache Software Foundation Apache HTTP Server before 2.4.69 on all platforms allows an untrusted backend server to cause a denial of service via a proxied response with a charset whose conversion partially succeeds then fails. Users are recommended to upgrade to version 2.4.69, which fixes this issue.
- Related products — impact not confirmed
- Apache HTTP Server
- Source-reported affected versions
- Apache HTTP Server 2.4.0 through 2.4.68
- Source-reported fixed versions
- 2.4.69
- Mitigation guidance
- Users are recommended to upgrade to version 2.4.69, which fixes this issue.
Red Hat
1 advisory- Advisory severityHigh7.5
High [CVE-2026-63686] Denial of Service via charset conversion failure in mod_xml2enc
CVE-2026-63686Source published Source updated
Denial of Service via charset conversion failure in mod_xml2enc. Red Hat rates this important (CVSS 7.5). Weakness: CWE-476. Red Hat lists fixing advisory RHSA-2026:74858 with package httpd-main-2.4.69-1.hum1. Affected products named by the advisory: Red Hat Hardened Images; Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; and 3 more.
- Related products — impact not confirmed
- Red Hat Hardened Images
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
3 more entries in the full advisory.
- Source-reported affected versions
- Affected-version details not available in this record.
- Source-reported fixed versions
- httpd-main-2.4.69-1.hum1
- RHSA-2026:74858
- Mitigation guidance
- If proxy character set transcoding is not required, disable the mod_xml2enc module by commenting out its configuration directive. 1. Edit the module configuration file (typically located under `/etc/httpd/conf.modules.d/`) and comment out the loading directive: # LoadModule xml2enc_module modules/mod_xml2enc.so 2. Verify the configuration syntax: httpd -t 3. Reload the Apache HTTP Server to apply changes: systemctl reload httpd Caveats: Disabling mod_xml2enc will break modules that depend on XML or HTML character set conversion, such as mod_proxy_html. If this module is required, restrict proxy rules so httpd communicates only with trusted upstream backends. Warning: Reloading or restarting the httpd service may cause a brief interruption to active connections.
Android app · Google Play
Turn CVE research into alerts on your phone.
Choose a whole vendor or a precise platform, then receive matching security advisories by phone notification, email, or both. Coverage follows 32 official vendor sources and 160+ reviewed platform categories.