Medium severity5.3NVD Advisory· Published Jun 10, 2021· Updated Jun 17, 2026
CVE-2021-30641
CVE-2021-30641
Description
Apache HTTP Server versions 2.4.39 to 2.4.46 Unexpected matching behavior with 'MergeSlashes OFF'
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
412.4.39 - 2.4.46+ 1 more
- (no CPE)range: 2.4.39 - 2.4.46
- (no CPE)range: 2.4.46
- osv-coords39 versionspkg:bitnami/apachepkg:rpm/almalinux/mod_http2pkg:rpm/almalinux/mod_mdpkg:rpm/opensuse/apache2&distro=openSUSE%20Leap%2015.2pkg:rpm/opensuse/apache2&distro=openSUSE%20Leap%2015.3pkg:rpm/suse/apache2&distro=HPE%20Helion%20OpenStack%208pkg:rpm/suse/apache2&distro=SUSE%20Enterprise%20Storage%206pkg:rpm/suse/apache2&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP1-ESPOSpkg:rpm/suse/apache2&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP1-LTSSpkg:rpm/suse/apache2&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-ESPOSpkg:rpm/suse/apache2&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-LTSSpkg:rpm/suse/apache2&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP2pkg:rpm/suse/apache2&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP3pkg:rpm/suse/apache2&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Package%20Hub%2015%20SP3pkg:rpm/suse/apache2&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Server%20Applications%2015%20SP2pkg:rpm/suse/apache2&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Server%20Applications%2015%20SP3pkg:rpm/suse/apache2&distro=SUSE%20Linux%20Enterprise%20Point%20of%20Sale%2011%20SP3pkg:rpm/suse/apache2&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP4-LTSSpkg:rpm/suse/apache2&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2-BCLpkg:rpm/suse/apache2&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3-BCLpkg:rpm/suse/apache2&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3-LTSSpkg:rpm/suse/apache2&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP4-LTSSpkg:rpm/suse/apache2&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5pkg:rpm/suse/apache2&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP1-BCLpkg:rpm/suse/apache2&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP1-LTSSpkg:rpm/suse/apache2&distro=SUSE%20Linux%20Enterprise%20Server%2015-LTSSpkg:rpm/suse/apache2&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP3pkg:rpm/suse/apache2&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP4pkg:rpm/suse/apache2&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5pkg:rpm/suse/apache2&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015pkg:rpm/suse/apache2&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP1pkg:rpm/suse/apache2&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012%20SP5pkg:rpm/suse/apache2&distro=SUSE%20Manager%20Proxy%204.0pkg:rpm/suse/apache2&distro=SUSE%20Manager%20Retail%20Branch%20Server%204.0pkg:rpm/suse/apache2&distro=SUSE%20Manager%20Server%204.0pkg:rpm/suse/apache2&distro=SUSE%20OpenStack%20Cloud%208pkg:rpm/suse/apache2&distro=SUSE%20OpenStack%20Cloud%209pkg:rpm/suse/apache2&distro=SUSE%20OpenStack%20Cloud%20Crowbar%208pkg:rpm/suse/apache2&distro=SUSE%20OpenStack%20Cloud%20Crowbar%209
>= 2.4.39, < 2.4.47+ 38 more
- (no CPE)range: >= 2.4.39, < 2.4.47
- (no CPE)range: < 1.15.7-3.module_el8.5.0+2609+b30d9eec
- (no CPE)range: < 1:2.0.8-8.module_el8.5.0+2609+b30d9eec
- (no CPE)range: < 2.4.43-lp152.2.15.1
- (no CPE)range: < 2.4.43-3.22.1
- (no CPE)range: < 2.4.23-29.74.1
- (no CPE)range: < 2.4.33-3.50.1
- (no CPE)range: < 2.4.33-3.50.1
- (no CPE)range: < 2.4.33-3.50.1
- (no CPE)range: < 2.4.33-3.50.1
- (no CPE)range: < 2.4.33-3.50.1
- (no CPE)range: < 2.4.43-3.22.1
- (no CPE)range: < 2.4.43-3.22.1
- (no CPE)range: < 2.4.43-3.22.1
- (no CPE)range: < 2.4.43-3.22.1
- (no CPE)range: < 2.4.43-3.22.1
- (no CPE)range: < 2.2.34-70.35.1
- (no CPE)range: < 2.2.34-70.35.1
- (no CPE)range: < 2.4.23-29.74.1
- (no CPE)range: < 2.4.23-29.74.1
- (no CPE)range: < 2.4.23-29.74.1
- (no CPE)range: < 2.4.23-29.74.1
- (no CPE)range: < 2.4.23-29.74.1
- (no CPE)range: < 2.4.33-3.50.1
- (no CPE)range: < 2.4.33-3.50.1
- (no CPE)range: < 2.4.33-3.50.1
- (no CPE)range: < 2.4.23-29.74.1
- (no CPE)range: < 2.4.23-29.74.1
- (no CPE)range: < 2.4.23-29.74.1
- (no CPE)range: < 2.4.33-3.50.1
- (no CPE)range: < 2.4.33-3.50.1
- (no CPE)range: < 2.4.23-29.74.1
- (no CPE)range: < 2.4.33-3.50.1
- (no CPE)range: < 2.4.33-3.50.1
- (no CPE)range: < 2.4.33-3.50.1
- (no CPE)range: < 2.4.23-29.74.1
- (no CPE)range: < 2.4.23-29.74.1
- (no CPE)range: < 2.4.23-29.74.1
- (no CPE)range: < 2.4.23-29.74.1
Patches
Vulnerability mechanics
References
12- httpd.apache.org/security/vulnerabilities_24.htmlnvdVendor Advisory
- www.openwall.com/lists/oss-security/2021/06/10/8nvdMailing ListThird Party Advisory
- lists.apache.org/thread.html/re026d3da9d7824bd93b9f871c0fdda978d960c7e62d8c43cba8d0bf3%40%3Ccvs.httpd.apache.org%3EnvdMailing ListRelease NotesVendor Advisory
- lists.debian.org/debian-lts-announce/2021/07/msg00006.htmlnvdMailing ListThird Party Advisory
- security.gentoo.org/glsa/202107-38nvdThird Party Advisory
- security.netapp.com/advisory/ntap-20210702-0001/nvdThird Party Advisory
- www.debian.org/security/2021/dsa-4937nvdThird Party Advisory
- www.oracle.com/security-alerts/cpuoct2021.htmlnvdThird Party Advisory
- lists.apache.org/thread.html/r2b4773944d83d2799de9fbaeee7fe0f3fd72669467787e02f434cb10%40%3Cannounce.httpd.apache.org%3Envd
- lists.apache.org/thread.html/r7f2b70b621651548f4b6f027552f1dd91705d7111bb5d15cda0a68dd%40%3Cdev.httpd.apache.org%3Envd
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SPBR6WUYBJNACHKE65SPL7TJOHX7RHWD/nvd
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZNCYSR3BXT36FFF4XTCPL3HDQK4VP45R/nvd
News mentions
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