CVE-2026-63292

high

Stack-based buffer overflow in mod_vhost_alias in Apache Software Foundation Apache HTTP Server through 2.4.68 on all platforms allows a remote client to cause…

Vendor / product: Apache — http server

Stack-based buffer overflow in mod_vhost_alias in Apache Software Foundation Apache HTTP Server through 2.4.68 on all platforms allows a remote client to cause a denial of service or potentially execute arbitrary code via an HTTP request with a Host header exceeding 8192 bytes when VirtualDocumentRoot uses a hostname format specifier and LimitRequestFieldSize is raised above the default. Users are recommended to upgrade to version 2.4.69, which fixes this issue.

CVSS

7.5

7.5 (CVSS v3.1)

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Severity source: NVD CVSS v3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)

Timeline (UTC)

Published: 2026-10-01 17:17

Modified: 2026-10-05 17:47

NVD status: Analyzed

Last synced 2 days ago

Verified against the source API 2026-10-27 06:56 UTC

Exploitation

Not listed in CISA KEV (as of last catalog sync)

Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).

Affected products

apache / http_server ≥2.4.0 <2.4.69

Weakness classification (CWE)

CWE-121

Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.

Mitigation & advisories

Vendor advisory: https://httpd.apache.org/security/vulnerabilities_24.html

References

https://httpd.apache.org/security/vulnerabilities_24.html security@apache.org
http://www.openwall.com/lists/oss-security/2026/10/01/24 af854a3a-2127-422b-91ae-364da2661108

Data sources

NVD CVE API 2.0 — fetched 2026-10-27 06:56 UTC · record ↗

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CVE-2026-63292

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Weakness classification (CWE)

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References

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