Advisoriesby IbisApache Software FoundationCVE-2026-63686
Apache HTTP Server: null pointer dereference
High7.5CVE-2026-63686 · Published Oct 1, 2026 · updated Oct 5, 2026
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.
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| Apache HTTP Server Product | >= 2.4.0, <= 2.4.68 | No fix yet |
Details and references
- CVSS 3.1
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Severity from
- CISA (its enrichment of the CVE record)
- Weakness
- CWE-476
More Apache Software Foundation advisories
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|---|---|---|---|
| Oct 1 | Apache HTTP Server: integer overflow | High8.8 | No fix yet |
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| Oct 1 | Apache HTTP Server: request smuggling | High7.5 | No fix yet |
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| Oct 1 | Apache HTTP Server: exposed files | Medium5.3 | No fix yet |