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    CVE-2005-2088

    The Apache HTTP server before 1.3.34, and 2.0.x before 2.0.55, when acting as an HTTP proxy, allows remote attackers to poison the web cache, bypass web application firewall protection, and conduct XSS attacks via an HTTP request with both a "Transfer-Encoding: chunked" header and a Content-Length header, which causes Apache to incorrectly handle and forward the body of the request in a way that causes the receiving server to process it as a separate HTTP request, aka "HTTP Request Smuggling."

    Published:Jun 12, 2005
    Last Modified:Apr 16, 2026
    EPS:Jun 30, 2005
    EPSS Score:0.54293
    CVSS Score:4.3

    Affected Products

    Vendor
    Apache
    Product
    Http Server
    Vendor
    Debian
    Product
    Debian Linux
    Vendor
    Redhat
    Product
    Enterprise Linux

    Exploits

    http://securityreason.com/securityalert/604http://www.securiteam.com/securityreviews/5GP0220G0U.htmlhttp://securityreason.com/securityalert/604http://www.securiteam.com/securityreviews/5GP0220G0U.html

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-273 HTTP Response Smuggling
    CAPEC-33 HTTP Request Smuggling

    Related CVEs

    CVE-2026-48913 (CVSS 7.3) — Use After Free vulnerability in Apache HTTP Server module mod_http2 when file handles are already exhausted. …
    CVE-2026-42536 (CVSS 7.5) — Heap-based Buffer Overflow vulnerability in Apache HTTP Server with mod_xml2enc, xml2StartParse, and untrusted…
    CVE-2026-44185 (CVSS 7.3) — Buffer Over-read vulnerability in Apache HTTP Server via outbound OCSP requests to an attacker controlled OCSP…
    CVE-2026-34355 (CVSS 7.5) — A buffer overflow in mod_proxy_html in Apache HTTP Server 2.4.67 and earlier allows an attack by an untrusted …
    CVE-2026-44631 (CVSS 9.8) — Buffer Underwrite vulnerability in Apache HTTP Server on crafted regular expressions in the configuration. Th…
    CVE-2026-44119 (CVSS 5.5) — Improper Privilege Management vulnerability in Apache HTTP Server 2.4.67 and earlier allows local .htaccess au…
    CVE-2026-43951 (CVSS 6.5) — Out-of-bounds Read vulnerability in Apache HTTP Server with mod_headers and mod_mime and multiple response lan…
    CVE-2026-42535 (CVSS 9.1) — A path handling issue in mod_dav_fs in Apache 2.4.67 and earlier allows a WebDAV content author to directly ma…
    CVE-2026-34356 (CVSS 7.5) — Heap-based Buffer Overflow vulnerability in Apache HTTP Server with malicious backend servers and ProxyPassRev…
    CVE-2026-44186 (CVSS 7.3) — Loop with Unreachable Exit Condition ('Infinite Loop') vulnerability in the mod_proxy_ftp module in Apache HTT…

    References

    http://docs.info.apple.com/article.html?artnum=302847
    http://lists.trustix.org/pipermail/tsl-announce/2005-October/000354.html
    http://marc.info/?l=apache-httpd-announce&m=112931556417329&w=3
    http://seclists.org/lists/bugtraq/2005/Jun/0025.html
    http://secunia.com/advisories/14530
    http://secunia.com/advisories/17319
    http://secunia.com/advisories/17487
    http://secunia.com/advisories/17813
    http://secunia.com/advisories/19072
    http://secunia.com/advisories/19073
    http://secunia.com/advisories/19185
    http://secunia.com/advisories/19317
    http://secunia.com/advisories/23074
    http://securityreason.com/securityalert/604
    http://securitytracker.com/id?1014323
    http://slackware.com/security/viewer.php?l=slackware-security&y=2005&m=slackware-security.600000
    http://sunsolve.sun.com/search/document.do?assetkey=1-26-102197-1
    http://sunsolve.sun.com/search/document.do?assetkey=1-26-102198-1
    http://support.avaya.com/elmodocs2/security/ASA-2006-081.htm
    http://www-1.ibm.com/support/search.wss?rs=0&q=PK13959&apar=only
    http://www-1.ibm.com/support/search.wss?rs=0&q=PK16139&apar=only
    http://www.apache.org/dist/httpd/CHANGES_1.3
    http://www.apache.org/dist/httpd/CHANGES_2.0
    http://www.debian.org/security/2005/dsa-803
    http://www.debian.org/security/2005/dsa-805
    http://www.mandriva.com/security/advisories?name=MDKSA-2005:130
    http://www.novell.com/linux/security/advisories/2005_18_sr.html
    http://www.novell.com/linux/security/advisories/2005_46_apache.html
    http://www.redhat.com/support/errata/RHSA-2005-582.html
    http://www.securiteam.com/securityreviews/5GP0220G0U.html
    http://www.securityfocus.com/archive/1/428138/100/0/threaded
    http://www.securityfocus.com/bid/14106
    http://www.securityfocus.com/bid/15647
    http://www.ubuntu.com/usn/usn-160-2
    http://www.vupen.com/english/advisories/2005/2140
    http://www.vupen.com/english/advisories/2005/2659
    http://www.vupen.com/english/advisories/2006/0789
    http://www.vupen.com/english/advisories/2006/1018
    http://www.vupen.com/english/advisories/2006/4680
    http://www.watchfire.com/resources/HTTP-Request-Smuggling.pdf
    http://www1.itrc.hp.com/service/cki/docDisplay.do?docId=c00612828
    https://lists.apache.org/thread.html/54a42d4b01968df1117cea77fc53d6beb931c0e05936ad02af93e9ac%40%3Ccvs.httpd.apache.org%3E
    https://lists.apache.org/thread.html/5df9bfb86a3b054bb985a45ff9250b0332c9ecc181eec232489e7f79%40%3Ccvs.httpd.apache.org%3E
    https://lists.apache.org/thread.html/r0276683d8e1e07153fc8642618830ac0ade85b9ae0dc7b07f63bb8fc%40%3Ccvs.httpd.apache.org%3E
    https://lists.apache.org/thread.html/r2cb985de917e7da0848c440535f65a247754db8b2154a10089e4247b%40%3Ccvs.httpd.apache.org%3E
    https://lists.apache.org/thread.html/r5001ecf3d6b2bdd0b732e527654248abb264f08390045d30709a92f6%40%3Ccvs.httpd.apache.org%3E
    https://lists.apache.org/thread.html/r734a07156abf332d5ab27fb91d9d962cacfef4f3681e44056f064fa8%40%3Ccvs.httpd.apache.org%3E
    https://lists.apache.org/thread.html/r8828e649175df56f1f9e3919938ac7826128525426e2748f0ab62feb%40%3Ccvs.httpd.apache.org%3E
    https://lists.apache.org/thread.html/r9e8622254184645bc963a1d47c5d47f6d5a36d6f080d8d2c43b2b142%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/rd65d8ba68ba17e7deedafbf5bb4899f2ae4dad781d21b931c2941ac3%40%3Ccvs.httpd.apache.org%3E
    https://lists.apache.org/thread.html/re895fc1736d25c8cf57e102c871613b8aeec9ea26fd8a44e7942b5ab%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%3A11452
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A1237
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A1526
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A1629
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A840
    https://secure-support.novell.com/KanisaPlatform/Publishing/741/3222109_f.SAL_Public.html
    http://docs.info.apple.com/article.html?artnum=302847
    http://lists.trustix.org/pipermail/tsl-announce/2005-October/000354.html
    http://marc.info/?l=apache-httpd-announce&m=112931556417329&w=3
    http://seclists.org/lists/bugtraq/2005/Jun/0025.html
    http://secunia.com/advisories/14530
    http://secunia.com/advisories/17319
    http://secunia.com/advisories/17487
    http://secunia.com/advisories/17813
    http://secunia.com/advisories/19072
    http://secunia.com/advisories/19073
    http://secunia.com/advisories/19185
    http://secunia.com/advisories/19317
    http://secunia.com/advisories/23074
    http://securityreason.com/securityalert/604
    http://securitytracker.com/id?1014323
    http://slackware.com/security/viewer.php?l=slackware-security&y=2005&m=slackware-security.600000
    http://sunsolve.sun.com/search/document.do?assetkey=1-26-102197-1
    http://sunsolve.sun.com/search/document.do?assetkey=1-26-102198-1
    http://support.avaya.com/elmodocs2/security/ASA-2006-081.htm
    http://www-1.ibm.com/support/search.wss?rs=0&q=PK13959&apar=only
    http://www-1.ibm.com/support/search.wss?rs=0&q=PK16139&apar=only
    http://www.apache.org/dist/httpd/CHANGES_1.3
    http://www.apache.org/dist/httpd/CHANGES_2.0
    http://www.debian.org/security/2005/dsa-803
    http://www.debian.org/security/2005/dsa-805
    http://www.mandriva.com/security/advisories?name=MDKSA-2005:130
    http://www.novell.com/linux/security/advisories/2005_18_sr.html
    http://www.novell.com/linux/security/advisories/2005_46_apache.html
    http://www.redhat.com/support/errata/RHSA-2005-582.html
    http://www.securiteam.com/securityreviews/5GP0220G0U.html
    http://www.securityfocus.com/archive/1/428138/100/0/threaded
    http://www.securityfocus.com/bid/14106
    http://www.securityfocus.com/bid/15647
    http://www.ubuntu.com/usn/usn-160-2
    http://www.vupen.com/english/advisories/2005/2140
    http://www.vupen.com/english/advisories/2005/2659
    http://www.vupen.com/english/advisories/2006/0789
    http://www.vupen.com/english/advisories/2006/1018
    http://www.vupen.com/english/advisories/2006/4680
    http://www.watchfire.com/resources/HTTP-Request-Smuggling.pdf
    http://www1.itrc.hp.com/service/cki/docDisplay.do?docId=c00612828
    https://lists.apache.org/thread.html/54a42d4b01968df1117cea77fc53d6beb931c0e05936ad02af93e9ac%40%3Ccvs.httpd.apache.org%3E
    https://lists.apache.org/thread.html/5df9bfb86a3b054bb985a45ff9250b0332c9ecc181eec232489e7f79%40%3Ccvs.httpd.apache.org%3E
    https://lists.apache.org/thread.html/r0276683d8e1e07153fc8642618830ac0ade85b9ae0dc7b07f63bb8fc%40%3Ccvs.httpd.apache.org%3E
    https://lists.apache.org/thread.html/r2cb985de917e7da0848c440535f65a247754db8b2154a10089e4247b%40%3Ccvs.httpd.apache.org%3E
    https://lists.apache.org/thread.html/r5001ecf3d6b2bdd0b732e527654248abb264f08390045d30709a92f6%40%3Ccvs.httpd.apache.org%3E
    https://lists.apache.org/thread.html/r734a07156abf332d5ab27fb91d9d962cacfef4f3681e44056f064fa8%40%3Ccvs.httpd.apache.org%3E
    https://lists.apache.org/thread.html/r8828e649175df56f1f9e3919938ac7826128525426e2748f0ab62feb%40%3Ccvs.httpd.apache.org%3E
    https://lists.apache.org/thread.html/r9e8622254184645bc963a1d47c5d47f6d5a36d6f080d8d2c43b2b142%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/rd65d8ba68ba17e7deedafbf5bb4899f2ae4dad781d21b931c2941ac3%40%3Ccvs.httpd.apache.org%3E
    https://lists.apache.org/thread.html/re895fc1736d25c8cf57e102c871613b8aeec9ea26fd8a44e7942b5ab%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%3A11452
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A1237
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A1526
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A1629
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A840
    https://secure-support.novell.com/KanisaPlatform/Publishing/741/3222109_f.SAL_Public.html

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High