CVE-2006-3918

Exp

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.

Published: 2006-07-28 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2006-3918 is rated High Exploit Risk (69.1/100): CVSS Medium severity, with high exploitation likelihood (EPSS 93.31%, 100th percentile). 5 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +1.94% over the last day, indicating growing attacker interest. Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2006-3918

EDB-ID Source Kind Published Link
28424 exploit_db edb 2006-08-24 Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2006-3918

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 91.37% 93.31% +1.94%
2 2026-03-04 86.20% 91.37% +5.17%
3 2026-03-01 — 86.20% —

Full EPSS history (44 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2006-3918

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.3 2.0 MEDIUM
AV:N/AC:M/Au:N/C:N/I:P/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:N)
No availability impact.
 8.6 2.9 [email protected]

Weakness enumeration for CVE-2006-3918

OS Trackers for CVE-2006-3918

vendor priority summary link
debian low CVE-2006-3918 low priority: Debian including 1 source packages (apache2), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2006-3918
redhat medium — https://access.redhat.com/security/cve/CVE-2006-3918
ubuntu low CVE-2006-3918 low priority: Ubuntu including 2 source packages (apache, apache2), 18 status rows across 9 suites (dapper, edgy, feisty, gutsy, hardy, intrepid, jaunty, karmic, upstream): released 10, DNE 5, needs-triage 2, ignored 1. https://ubuntu.com/security/CVE-2006-3918

Vendor comments (NVD) for CVE-2006-3918

  • Apache (2008-07-02T00:00:00)

    Fixed in Apache HTTP Server 1.3.35: http://httpd.apache.org/security/vulnerabilities_13.html

Affected software / configurations for CVE-2006-3918

Vendor Product Version Raw CPE
apache http_server >= 1.3.3, < 1.3.35 cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*
debian debian_linux 3.1 cpe:2.3:o:debian:debian_linux:3.1:*:*:*:*:*:*:*
canonical ubuntu_linux 6.06 cpe:2.3:o:canonical:ubuntu_linux:6.06:*:*:*:*:*:*:*
canonical ubuntu_linux 6.10 cpe:2.3:o:canonical:ubuntu_linux:6.10:*:*:*:*:*:*:*
canonical ubuntu_linux 7.04 cpe:2.3:o:canonical:ubuntu_linux:7.04:*:*:*:*:*:*:*
canonical ubuntu_linux 7.10 cpe:2.3:o:canonical:ubuntu_linux:7.10:*:*:*:*:*:*:*
redhat enterprise_linux_server 2.0 cpe:2.3:o:redhat:enterprise_linux_server:2.0:*:*:*:*:*:*:*
redhat enterprise_linux_workstation 2.0 cpe:2.3:o:redhat:enterprise_linux_workstation:2.0:*:*:*:*:*:*:*

References for CVE-2006-3918

URL Tags
ftp://patches.sgi.com/support/free/security/advisories/20060801-01-P Broken Link
http://archives.neohapsis.com/archives/bugtraq/2006-05/0151.html Broken Link Exploit
http://archives.neohapsis.com/archives/bugtraq/2006-07/0425.html Broken Link Exploit
http://kb.vmware.com/KanisaPlatform/Publishing/466/5915871_f.SAL_Public.html Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2008-04/msg00004.html Mailing List Third Party Advisory
http://marc.info/?l=bugtraq&m=125631037611762&w=2 Issue Tracking Mailing List Third Party Advisory
http://marc.info/?l=bugtraq&m=129190899612998&w=2 Issue Tracking Mailing List Third Party Advisory
http://marc.info/?l=bugtraq&m=130497311408250&w=2 Issue Tracking Mailing List Third Party Advisory
http://openbsd.org/errata.html#httpd2 Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2006-0618.html Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2006-0692.html Third Party Advisory
http://secunia.com/advisories/21172 Not Applicable Patch Vendor Advisory
http://secunia.com/advisories/21174 Not Applicable Patch Vendor Advisory
http://secunia.com/advisories/21399 Not Applicable
http://secunia.com/advisories/21478 Not Applicable
http://secunia.com/advisories/21598 Not Applicable
http://secunia.com/advisories/21744 Not Applicable
http://secunia.com/advisories/21848 Not Applicable
http://secunia.com/advisories/21986 Not Applicable
http://secunia.com/advisories/22140 Not Applicable
http://secunia.com/advisories/22317 Not Applicable
http://secunia.com/advisories/22523 Not Applicable
http://secunia.com/advisories/28749 Not Applicable
http://secunia.com/advisories/29640 Not Applicable
http://secunia.com/advisories/40256 Not Applicable
http://securityreason.com/securityalert/1294 Exploit Third Party Advisory
http://securitytracker.com/id?1016569 Broken Link Third Party Advisory VDB Entry
http://support.avaya.com/elmodocs2/security/ASA-2006-194.htm Third Party Advisory
http://svn.apache.org/viewvc?view=rev&revision=394965 Exploit Vendor Advisory
http://www-1.ibm.com/support/docview.wss?uid=swg1PK24631 Third Party Advisory
http://www-1.ibm.com/support/docview.wss?uid=swg24013080 Third Party Advisory
http://www.debian.org/security/2006/dsa-1167 Third Party Advisory
http://www.f-secure.com/en_EMEA/support/security-advisory/fsc-2010-2.html Third Party Advisory
http://www.novell.com/linux/security/advisories/2006_51_apache.html Third Party Advisory
http://www.redhat.com/support/errata/RHSA-2006-0619.html Third Party Advisory
http://www.securityfocus.com/bid/19661 Third Party Advisory VDB Entry
http://www.securitytracker.com/id?1024144 Broken Link Third Party Advisory VDB Entry
http://www.ubuntu.com/usn/usn-575-1 Third Party Advisory
http://www.vupen.com/english/advisories/2006/2963 Permissions Required
http://www.vupen.com/english/advisories/2006/2964 Permissions Required
http://www.vupen.com/english/advisories/2006/3264 Permissions Required
http://www.vupen.com/english/advisories/2006/4207 Permissions Required
http://www.vupen.com/english/advisories/2006/5089 Permissions Required
http://www.vupen.com/english/advisories/2010/1572 Permissions Required
http://www14.software.ibm.com/webapp/set2/subscriptions/pqvcmjd?mode=18&ID=3117 Broken Link
https://lists.apache.org/thread.html/r5419c9ba0951ef73a655362403d12bb8d10fab38274deb3f005816f5%40%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/r5f9c22f9c28adbd9f00556059edc7b03a5d5bb71d4bb80257c0d34e4%40%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/r652fc951306cdeca5a276e2021a34878a76695a9f3cfb6490b4a6840%40%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/r9f93cf6dde308d42a9c807784e8102600d0397f5f834890708bf6920%40%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/rafd145ba6cd0a4ced113a5823cdaff45aeb36eb09855b216401c66d6%40%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/rb9c9f42dafa25d2f669dac2a536a03f2575bc5ec1be6f480618aee10%40%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/reb542d2038e9c331506e0cbff881b47e40fbe2bd93ff00979e60cdf7%40%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/rf2f0f3611f937cf6cfb3b4fe4a67f69885855126110e1e3f2fb2728e%40%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/rf6449464fd8b7437704c55f88361b66f12d5b5f90bcce66af4be4ba9%40%3Ccvs.httpd.apache.org%3E
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10352 Third Party Advisory
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12238 Third Party Advisory
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