Which products and versions are affected by CVE-2006-3918?

Affected: HTTP Server (Apache); Ubuntu Linux (Canonical) versions 6.06, 6.10, 7.04, 7.10; Debian Linux versions 3.1, among others. The full list is in the CVE brief.

Is CVE-2006-3918 being exploited in the wild?

It is not listed in any known-exploited vulnerabilities catalog.

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

No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.

Is there a public exploit for CVE-2006-3918?

Public exploit code is available.

Is there a fix for CVE-2006-3918?

Fixed versions are available, including ant 0:1.6.5-1jpp_1rh, apache 1.3.33-6sarge3, HTTP Server 1.3.35.

How urgently should CVE-2006-3918 be patched?

Brandefense priority: patch immediately, because it is very likely to be exploited soon.

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Vulnerability Intelligence

CVE-2006-3918

MediumPublic exploit

Published Jul 28, 2006 · Updated Aug 4, 2026 · Also known as DEBIAN-CVE-2006-3918

Key Facts

Patch immediately

CVE-2006-3918 is a medium-severity vulnerability (CVSS 4.3 v2) affecting HTTP Server (Apache), Ubuntu Linux (Canonical), Debian Linux and 22 more products.
It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
EPSS estimates a 95% probability of exploitation in the next 30 days.
Fixed versions are available, including ant 0:1.6.5-1jpp_1rh, apache 1.3.33-6sarge3, HTTP Server 1.3.35.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.

CVSS v2

4.3

AV:N/AC:M/Au:N/C:N/I:P/A:N

EPSS (30-day exploit likelihood)

95%

Higher than 99.8% of all scored CVEs

Exploited in the wild

No known

Not in a known-exploited catalog

Public exploit code

Available

Proof-of-concept or weaponized module

Get the full CVE-2006-3918 brief as a PDF

Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.

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.

Affected Products

46 affected entries in total

Product	Affected versions	Fixed in
HTTP ServerApache	See advisory	1.3.35
Ubuntu LinuxCanonical	6.06, 6.10, 7.04, 7.10	n/a
Debian LinuxDebian	3.1	n/a
Enterprise Linux ServerRedhat	2.0	n/a
Enterprise Linux WorkstationRedhat	2.0	n/a

20 more affected products in the full CVE brief

Patched Releases

ant

0:1.6.5-1jpp_1rh

apache

1.3.33-6sarge3

HTTP Server

1.3.35

apache2

2.0.55-4.1

avalon-logkit

0:1.2-2jpp_4rh

axis

0:1.2.1-1jpp_3rh

classpathx-jaf

0:1.0-2jpp_6rh

classpathx-mail

0:1.1.1-2jpp_8rh

geronimo-specs

0:1.0-0.M4.1jpp_10rh

httpd

0:2.0.46-61.ent

jabberd

0:2.0s10-3.38.rhn

jakarta-commons-modeler

0:2.0-3jpp_2rh

log4j

0:1.2.12-1jpp_1rh

mx4j

1:3.0.1-1jpp_4rh

pcsc-lite

0:1.3.3-3.el4

rhn-apache

0:1.3.27-36.rhn.rhel4

rhn-modperl

0:1.29-16.rhel3

rhpki-ca

0:7.3.0-20.el4

rhpki-java-tools

0:7.3.0-10.el4

rhpki-kra

0:7.3.0-14.el4

rhpki-manage

0:7.3.0-19.el4

rhpki-native-tools

0:7.3.0-6.el4

rhpki-ocsp

0:7.3.0-13.el4

rhpki-tks

0:7.3.0-13.el4

rootio-apache2

2.0.55-4.1

Timeline

Publicly disclosed
Jul 28, 2006
Last updated
Aug 4, 2026

Weakness Type

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

References

advisoryhttp://kb.vmware.com/KanisaPlatform/Publishing/466/5915871_f.SAL_Public.html
advisorySUSE-SA:2008:021
advisoryHPSBUX02465
advisoryHPSBUX02612
advisorySSRT090208

15 more references in the full CVE brief

FAQ

Common Questions.

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)…
Affected: HTTP Server (Apache); Ubuntu Linux (Canonical) versions 6.06, 6.10, 7.04, 7.10; Debian Linux versions 3.1, among others. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including ant 0:1.6.5-1jpp_1rh, apache 1.3.33-6sarge3, HTTP Server 1.3.35.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.

Is CVE-2006-3918 Running On Your Attack Surface?

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