Is CVE-2006-3918 in the CISA KEV catalog?

No. CVE-2006-3918 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2006-3918?

CVE-2006-3918 has a CVSS v2 base score of 4.3 (MEDIUM).

What is the EPSS score for CVE-2006-3918?

CVE-2006-3918 has an EPSS score of 94.93% (100th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2006-3918?

Upgrade apache2 on debian 11 to 2.0.55-4.1 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2006-3918

MEDIUMEPSS 100th pctl

4.3

CVSS v2

NVD

Description

http_protocol.c in (1) IBM HTTP Server 6.0 before 6.0.2.13 and 6.1 before 6.1.0.1, and (2) Apache HTTP Server 1.3 before 1.3.35, 2.0 before 2.0.58, and 2.2 before 2.2.2, does not sanitize the Expect header from an HTTP request when it is reflected back in an error message, which might allow cross-site scripting (XSS) style attacks using web client components that can send arbitrary headers in requests, as demonstrated using a Flash SWF file.

CWE-79Cross-Site Scripting (XSS)

How to fix

Remediation Available

apache2Debian

Fixed in:2.0.55-4.1CVE-2006-3918

httpdWindows application

Affected:1.3.3 1.3.35Fixed in:1.3.35Apache Lounge

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

94.93%probability of exploitation in 30 days

100thpercentile

Very high risk: more likely to be exploited than 100% of all known CVEs.

References

Related Vulnerabilities

Other CWE-79 (Cross-Site Scripting (XSS)) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2020-11022	Medium	6.9	99%	-	Fix
CVE-2019-3929	Critical	9.8	99%	KEV	Fix
CVE-2020-9496	Medium	6.1	99%	-	-
CVE-2023-28341	Medium	6.1	99%	-	Fix
CVE-2018-12998	Medium	6.1	98%	-	-
CVE-2025-4123	High	7.6	98%	-	Fix

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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 2026-04-16.