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10.0

Apache HTTP Server can be crashed by many MIME headers

CVE-1999-0926 · published 27 years ago
Summary

The Apache web server can be forced to stop responding if an attacker sends a request containing an unusually large number of MIME headers. This could make the website unavailable to legitimate users. Apply the latest Apache update or configure the server to limit the number of headers it accepts.

What to do

The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.

Affected software
VendorProductAffected versions
apache http_server 1.2.5
cpe:2.3:a:apache:http_server:1.2.5:*:*:*:*:*:*:*
Original advisory text
Apache allows remote attackers to conduct a denial of service via a large number of MIME headers.
Apache allows remote attackers to conduct a denial of service via a large number of MIME headers.
References
Fix within
Internet-facing 3 days
Internal 60 days
  • Not known to be exploited
  • Can be exploited automatically (estimated)
  • Gives an attacker full control (estimated)
Severity
10.0 Critical
Exploitation
9% chance of attack within 30 days
Timeline
Published3 Sep 1999
Updated15 Oct 2026
First seen29 Sep 2026
Sources
CVE-1999-0926 · NVD
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