CVE & CISA-KEV Catalog

CVE-2011-3348

MEDIUMEPSS 97th pctl
4.3
CVSS v2
NVD

Description

The mod_proxy_ajp module in the Apache HTTP Server before 2.2.21, when used with mod_proxy_balancer in certain configurations, allows remote attackers to cause a denial of service (temporary "error state" in the backend server) via a malformed HTTP request.

CWE-400Resource Exhaustion

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

22.38%probability of exploitation in 30 days
97thpercentile

Very high risk: more likely to be exploited than 97% of all known CVEs.

References

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-29.