When was CVE-1999-1199 disclosed?

CVE-1999-1199 was first published in the National Vulnerability Database on August 7, 1998, with the most recent update on April 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-1999-1199 actively exploited?

CVE-1999-1199 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 90.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

How do I remediate CVE-1999-1199?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-1999-1199, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

CVE-1999-1199

NONECVSS 0.0

0.0

Apache WWW server 1.3.1 and earlier allows remote attackers to cause a denial of service (resource exhaustion) via a large number of MIME headers with the same name, aka the "sioux" vulnerability.

CVSS v3: —
EG Score: —
EPSS: 90.0%
KEV: Not listed

References (18)

cve@mitrehttp://marc.info/?l=bugtraq&m=90252779826784&w=2
cve@mitrehttp://marc.info/?l=bugtraq&m=90276683825862&w=2
cve@mitrehttp://marc.info/?l=bugtraq&m=90280517007869&w=2
cve@mitrehttp://marc.info/?l=bugtraq&m=90286768232093&w=2
cve@mitrehttp://www.redhat.com/support/errata/rh51-errata-general.html#apache
cve@mitrehttps://lists.apache.org/thread.html/r5419c9ba0951ef73a655362403d12bb8d10fab38274deb3f005816f5%40%3Ccvs.httpd.apache.org%3E
cve@mitrehttps://lists.apache.org/thread.html/r9f93cf6dde308d42a9c807784e8102600d0397f5f834890708bf6920%40%3Ccvs.httpd.apache.org%3E
cve@mitrehttps://lists.apache.org/thread.html/rf2f0f3611f937cf6cfb3b4fe4a67f69885855126110e1e3f2fb2728e%40%3Ccvs.httpd.apache.org%3E
cve@mitrehttps://lists.apache.org/thread.html/rf6449464fd8b7437704c55f88361b66f12d5b5f90bcce66af4be4ba9%40%3Ccvs.httpd.apache.org%3E
af854a3a-2127-422b-91ae-364da2661108http://marc.info/?l=bugtraq&m=90252779826784&w=2
af854a3a-2127-422b-91ae-364da2661108http://marc.info/?l=bugtraq&m=90276683825862&w=2
af854a3a-2127-422b-91ae-364da2661108http://marc.info/?l=bugtraq&m=90280517007869&w=2
af854a3a-2127-422b-91ae-364da2661108http://marc.info/?l=bugtraq&m=90286768232093&w=2
af854a3a-2127-422b-91ae-364da2661108http://www.redhat.com/support/errata/rh51-errata-general.html#apache
af854a3a-2127-422b-91ae-364da2661108https://lists.apache.org/thread.html/r5419c9ba0951ef73a655362403d12bb8d10fab38274deb3f005816f5%40%3Ccvs.httpd.apache.org%3E

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CVE-1999-1199

Published

Last Modified

References (18)

Data Freshness Timeline

Frequently asked(4)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-1999-1199?

CVE-1999-1199

📅 Published

🔄 Last Modified

🔗 References (18)

Data Freshness Timeline

❓ Frequently asked(4)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-1999-1199?

Published

Last Modified

References (18)

Frequently asked(4)