--- title: "CVE-2015-3183: The chunked transfer coding implementation… | CubePath" description: "The chunked transfer coding implementation in the Apache HTTP Server before 2.4.14 does not properly parse chunk headers, which allows remote attackers…" language: en source: https://cubepath.com/security/cve/CVE-2015-3183 --- # CVE-2015-3183: The chunked transfer coding implementation… | CubePath ## Description The chunked transfer coding implementation in the Apache HTTP Server before 2.4.14 does not properly parse chunk headers, which allows remote attackers to conduct HTTP request smuggling attacks via a crafted request, related to mishandling of large chunk-size values and invalid chunk-extension characters in modules/http/http\_filters.c. Official description from the CVE record, published by redhat. Copyright © 1999-2026 The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CVE license. [View the record on cve.org](https://www.cve.org/CVERecord?id=CVE-2015-3183) ## Key data ### EPSS Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days. Score 0.74387 (74.4% probability) Percentile 99.5% Scores of Nov 10, 2026 Model v2026.06.15 ## References Links listed in the CVE record. They lead to other sites, which CubePath does not control. - [HPSBUX03512](http://marc.info/?l=bugtraq&m=144493176821532&w=2) (marc.info) vendor-advisory - [RHSA-2016:2056](http://rhn.redhat.com/errata/RHSA-2016-2056.html) (rhn.redhat.com) vendor-advisory - [openSUSE-SU-2015:1684](http://lists.opensuse.org/opensuse-updates/2015-10/msg00011.html) (lists.opensuse.org) vendor-advisory - [httpd.apache.org/security/vulnerabilities\_24.html](http://httpd.apache.org/security/vulnerabilities%5F24.html) - [oracle.com/technetwork/security-advisory/cpujul2016-2881720…](http://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html) - [RHSA-2016:0061](http://rhn.redhat.com/errata/RHSA-2016-0061.html) (rhn.redhat.com) vendor-advisory - [oracle.com/technetwork/topics/security/cpuoct2015-2367953.h…](http://www.oracle.com/technetwork/topics/security/cpuoct2015-2367953.html) - [GLSA-201610-02](https://security.gentoo.org/glsa/201610-02) (security.gentoo.org) vendor-advisory - [oracle.com/technetwork/topics/security/cpujan2016-2367955.h…](http://www.oracle.com/technetwork/topics/security/cpujan2016-2367955.html) - [RHSA-2015:1667](http://rhn.redhat.com/errata/RHSA-2015-1667.html) (rhn.redhat.com) vendor-advisory - [RHSA-2016:0062](http://rhn.redhat.com/errata/RHSA-2016-0062.html) (rhn.redhat.com) vendor-advisory - [apache.org/dist/httpd/CHANGES\_2.4](http://www.apache.org/dist/httpd/CHANGES%5F2.4) - [RHSA-2015:1666](http://rhn.redhat.com/errata/RHSA-2015-1666.html) (rhn.redhat.com) vendor-advisory - [h20564.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?d…](https://h20564.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr%5Fna-c04832246) - [1032967](http://www.securitytracker.com/id/1032967) (securitytracker.com) vdb-entry - [RHSA-2015:1668](http://rhn.redhat.com/errata/RHSA-2015-1668.html) (rhn.redhat.com) vendor-advisory - [RHSA-2015:2661](http://rhn.redhat.com/errata/RHSA-2015-2661.html) (rhn.redhat.com) vendor-advisory - [RHSA-2016:2055](http://rhn.redhat.com/errata/RHSA-2016-2055.html) (rhn.redhat.com) vendor-advisory - [USN-2686-1](http://www.ubuntu.com/usn/USN-2686-1) (ubuntu.com) vendor-advisory - [APPLE-SA-2015-08-13-2](http://lists.apple.com/archives/security-announce/2015/Aug/msg00001.html) (lists.apple.com) vendor-advisory - [75963](http://www.securityfocus.com/bid/75963) (securityfocus.com) vdb-entry - [DSA-3325](http://www.debian.org/security/2015/dsa-3325) (debian.org) vendor-advisory - [RHSA-2015:2659](https://access.redhat.com/errata/RHSA-2015:2659) (access.redhat.com) vendor-advisory - [github.com/apache/httpd/commit/e427c41257957b57036d5a549b26…](https://github.com/apache/httpd/commit/e427c41257957b57036d5a549b260b6185d1dd73) - [puppet.com/security/cve/CVE-2015-3183](https://puppet.com/security/cve/CVE-2015-3183) - [91787](http://www.securityfocus.com/bid/91787) (securityfocus.com) vdb-entry - [RHSA-2015:2660](https://access.redhat.com/errata/RHSA-2015:2660) (access.redhat.com) vendor-advisory - [RHSA-2016:2054](http://rhn.redhat.com/errata/RHSA-2016-2054.html) (rhn.redhat.com) vendor-advisory - [support.apple.com/kb/HT205031](https://support.apple.com/kb/HT205031) - [h20564.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?d…](https://h20564.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr%5Fna-c04926789) - [APPLE-SA-2015-09-16-4](http://lists.apple.com/archives/security-announce/2015/Sep/msg00004.html) (lists.apple.com) vendor-advisory - [support.apple.com/HT205219](https://support.apple.com/HT205219) - [kb.juniper.net/InfoCenter/index?page=content&id=JSA10735](http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10735) - [oracle.com/technetwork/topics/security/bulletinoct2015-2511…](http://www.oracle.com/technetwork/topics/security/bulletinoct2015-2511968.html) - [\[httpd-cvs\] 20190815 svn commit: r1048743 \[4/4\] - in /websites/staging/httpd/trunk/content: ./ security/vulnerabilities-httpd.xml security/vulnerabilities\_13.html security/vulnerabilities\_20.html security/vulnerabilities\_22.html security/vulnerabilities\_24.html](https://lists.apache.org/thread.html/56c2e7cc9deb1c12a843d0dc251ea7fd3e7e80293cde02fcd65286ba%40%3Ccvs.httpd.apache.org%3E) (lists.apache.org) mailing-list - [\[httpd-cvs\] 20190815 svn commit: r1048742 \[4/4\] - in /websites/staging/httpd/trunk/content: ./ security/vulnerabilities-httpd.xml security/vulnerabilities\_13.html security/vulnerabilities\_20.html security/vulnerabilities\_22.html security/vulnerabilities\_24.html](https://lists.apache.org/thread.html/84a3714f0878781f6ed84473d1a503d2cc382277e100450209231830%40%3Ccvs.httpd.apache.org%3E) (lists.apache.org) mailing-list - [\[httpd-cvs\] 20190815 svn commit: r1048743 \[3/4\] - in /websites/staging/httpd/trunk/content: ./ security/vulnerabilities-httpd.xml security/vulnerabilities\_13.html security/vulnerabilities\_20.html security/vulnerabilities\_22.html security/vulnerabilities\_24.html](https://lists.apache.org/thread.html/8d63cb8e9100f28a99429b4328e4e7cebce861d5772ac9863ba2ae6f%40%3Ccvs.httpd.apache.org%3E) (lists.apache.org) mailing-list - [\[httpd-cvs\] 20190815 svn commit: r1048742 \[3/4\] - in /websites/staging/httpd/trunk/content: ./ security/vulnerabilities-httpd.xml security/vulnerabilities\_13.html security/vulnerabilities\_20.html security/vulnerabilities\_22.html security/vulnerabilities\_24.html](https://lists.apache.org/thread.html/f7f95ac1cd9895db2714fa3ebaa0b94d0c6df360f742a40951384a53%40%3Ccvs.httpd.apache.org%3E) (lists.apache.org) mailing-list - [\[httpd-cvs\] 20200401 svn commit: r1058586 \[3/4\] - in /websites/staging/httpd/trunk/content: ./ security/vulnerabilities-httpd.xml security/vulnerabilities\_13.html security/vulnerabilities\_20.html security/vulnerabilities\_22.html security/vulnerabilities\_24.html](https://lists.apache.org/thread.html/r57608dc51b79102f3952ae06f54d5277b649c86d6533dcd6a7d201f7%40%3Ccvs.httpd.apache.org%3E) (lists.apache.org) mailing-list - [\[httpd-cvs\] 20200401 svn commit: r1058586 \[4/4\] - in /websites/staging/httpd/trunk/content: ./ security/vulnerabilities-httpd.xml security/vulnerabilities\_13.html security/vulnerabilities\_20.html security/vulnerabilities\_22.html security/vulnerabilities\_24.html](https://lists.apache.org/thread.html/rd18c3c43602e66f9cdcf09f1de233804975b9572b0456cc582390b6f%40%3Ccvs.httpd.apache.org%3E) (lists.apache.org) mailing-list - [\[httpd-cvs\] 20200401 svn commit: r1058587 \[4/4\] - in /websites/staging/httpd/trunk/content: ./ security/vulnerabilities-httpd.xml security/vulnerabilities\_13.html security/vulnerabilities\_20.html security/vulnerabilities\_22.html security/vulnerabilities\_24.html](https://lists.apache.org/thread.html/re3d27b6250aa8548b8845d314bb8a350b3df326cacbbfdfe4d455234%40%3Ccvs.httpd.apache.org%3E) (lists.apache.org) mailing-list - [\[httpd-cvs\] 20200401 svn commit: r1058587 \[3/4\] - in /websites/staging/httpd/trunk/content: ./ security/vulnerabilities-httpd.xml security/vulnerabilities\_13.html security/vulnerabilities\_20.html security/vulnerabilities\_22.html security/vulnerabilities\_24.html](https://lists.apache.org/thread.html/rfbaf647d52c1cb843e726a0933f156366a806cead84fbd430951591b%40%3Ccvs.httpd.apache.org%3E) (lists.apache.org) mailing-list - [github.com/apache/httpd/commit/a6027e56924bb6227c1fdbf6f91e…](https://github.com/apache/httpd/commit/a6027e56924bb6227c1fdbf6f91e7e2438338be6) - [\[httpd-cvs\] 20210330 svn commit: r1073139 \[1/13\] - in /websites/staging/httpd/trunk/content: ./ security/json/](https://lists.apache.org/thread.html/rf6449464fd8b7437704c55f88361b66f12d5b5f90bcce66af4be4ba9%40%3Ccvs.httpd.apache.org%3E) (lists.apache.org) mailing-list - [\[httpd-cvs\] 20210330 svn commit: r1073139 \[9/13\] - in /websites/staging/httpd/trunk/content: ./ security/json/](https://lists.apache.org/thread.html/ra7f6aeb28661fbf826969526585f16856abc4615877875f9d3b35ef4%40%3Ccvs.httpd.apache.org%3E) (lists.apache.org) mailing-list - [\[httpd-cvs\] 20210330 svn commit: r1073140 \[3/4\] - in /websites/staging/httpd/trunk/content: ./ security/cvejsontohtml.py security/vulnerabilities\_13.html security/vulnerabilities\_20.html security/vulnerabilities\_22.html security/vulnerabilities\_24.html](https://lists.apache.org/thread.html/r9ea3538f229874c80a10af473856a81fbf5f694cd7f471cc679ba70b%40%3Ccvs.httpd.apache.org%3E) (lists.apache.org) mailing-list - [\[httpd-cvs\] 20210330 svn commit: r1073140 \[4/4\] - in /websites/staging/httpd/trunk/content: ./ security/cvejsontohtml.py security/vulnerabilities\_13.html security/vulnerabilities\_20.html security/vulnerabilities\_22.html security/vulnerabilities\_24.html](https://lists.apache.org/thread.html/rc998b18880df98bafaade071346690c2bc1444adaa1a1ea464b93f0a%40%3Ccvs.httpd.apache.org%3E) (lists.apache.org) mailing-list - [\[httpd-cvs\] 20210330 svn commit: r1888194 \[9/13\] - /httpd/site/trunk/content/security/json/](https://lists.apache.org/thread.html/r83109088737656fa6307bd99ab40f8ff0269ae58d3f7272d7048494a%40%3Ccvs.httpd.apache.org%3E) (lists.apache.org) mailing-list - [\[httpd-cvs\] 20210330 svn commit: r1073146 \[2/3\] - in /websites/staging/httpd/trunk/content: ./ security/cvejsontohtml.py security/vulnerabilities-httpd.xml security/vulnerabilities\_22.html security/vulnerabilities\_24.html](https://lists.apache.org/thread.html/rdca61ae990660bacb682295f2a09d34612b7bb5f457577fe17f4d064%40%3Ccvs.httpd.apache.org%3E) (lists.apache.org) mailing-list - [\[httpd-cvs\] 20210330 svn commit: r1073149 \[1/13\] - in /websites/staging/httpd/trunk/content: ./ security/ security/json/](https://lists.apache.org/thread.html/r9f93cf6dde308d42a9c807784e8102600d0397f5f834890708bf6920%40%3Ccvs.httpd.apache.org%3E) (lists.apache.org) mailing-list - [\[httpd-cvs\] 20210330 svn commit: r1073146 \[3/3\] - in /websites/staging/httpd/trunk/content: ./ security/cvejsontohtml.py security/vulnerabilities-httpd.xml security/vulnerabilities\_22.html security/vulnerabilities\_24.html](https://lists.apache.org/thread.html/rcc44594d4d6579b90deccd4536b5d31f099ef563df39b094be286b9e%40%3Ccvs.httpd.apache.org%3E) (lists.apache.org) mailing-list - [\[httpd-cvs\] 20210330 svn commit: r1073149 \[10/13\] - in /websites/staging/httpd/trunk/content: ./ security/ security/json/](https://lists.apache.org/thread.html/rb14daf9cc4e28d18cdc15d6a6ca74e565672fabf7ad89541071d008b%40%3Ccvs.httpd.apache.org%3E) (lists.apache.org) mailing-list - [\[httpd-cvs\] 20210606 svn commit: r1075470 \[3/4\] - in /websites/staging/httpd/trunk/content: ./ security/json/CVE-2020-13938.json security/vulnerabilities\_13.html security/vulnerabilities\_20.html security/vulnerabilities\_22.html security/vulnerabilities\_24.html](https://lists.apache.org/thread.html/r75cbe9ea3e2114e4271bbeca7aff96117b50c1b6eb7c4772b0337c1f%40%3Ccvs.httpd.apache.org%3E) (lists.apache.org) mailing-list ## Timeline 1. ID reserved Apr 10, 2015 2. Record published Jul 20, 2015 3. Record last updated Aug 6, 2024 ## Look up another CVE ## About CubePath CubePath is a cloud provider with data centers in Europe and the United States. It offers VPS, bare metal servers and DDoS protection. [Cloud VPS](https://cubepath.com/vps) [DDoS protection](https://cubepath.com/ddos-protection) Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 19:59 UTC. [Sources and licenses](https://cubepath.com/security/cve/legal)