A vulnerability was found in Apache HTTP Server 2.4.0 to 2.4.38.
Priority MEDIUM 41CWE-706Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- Low · None · None
- Fix status
- Partial Red Hat: 17 fixed, 3 without a fix
Attack profile from CVSS 3.0 · NVD. Fix status from CNA and Red Hat.
Summary
A vulnerability was found in Apache HTTP Server 2.4.0 to 2.4.38. When the path component of a request URL contains multiple consecutive slashes ('/'), directives such as LocationMatch and RewriteRule must account for duplicates in regular expressions while other aspects of the servers processing will implicitly collapse them.
Why it matters now
EPSS 0.1786 97th percentileScored 2026-11-07
Fix Partial Red Hat: 5 advisoriesRed Hat: 17 fixed, 3 without a fix
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Apache | Apache HTTP Server | 2.4.0 to 2.4.38 | — | No fix listed | CNA |
- Apache HTTP Server VendorApache Affected 2.4.0 to 2.4.38 Fixed in — No fix listed CNA
CPE configurations NVD · 12
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:* | 2.4.0 – 2.4.38 | Vulnerable | Apache |
| cpe:2.3:o:opensuse:leap:15.0:*:*:*:*:*:*:* | 15.0 | Vulnerable | openSUSE |
| cpe:2.3:o:opensuse:leap:42.3:*:*:*:*:*:*:* | 42.3 | Vulnerable | openSUSE |
| cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* | 8.0 | Vulnerable | Debian |
| cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* | 9.0 | Vulnerable | Debian |
| cpe:2.3:o:fedoraproject:fedora:28:*:*:*:*:*:*:* | 28 | Vulnerable | Fedoraproject |
| cpe:2.3:o:fedoraproject:fedora:29:*:*:*:*:*:*:* | 29 | Vulnerable | Fedoraproject |
| cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:* | 30 | Vulnerable | Fedoraproject |
| cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* | 14.04 | Vulnerable | Canonical |
| cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* | 16.04 | Vulnerable | Canonical |
- cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:* Versions 2.4.0 – 2.4.38 Vulnerable ·Apache
- cpe:2.3:o:opensuse:leap:15.0:*:*:*:*:*:*:* Versions 15.0 Vulnerable ·openSUSE
- cpe:2.3:o:opensuse:leap:42.3:*:*:*:*:*:*:* Versions 42.3 Vulnerable ·openSUSE
- cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Debian
- cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian
- cpe:2.3:o:fedoraproject:fedora:28:*:*:*:*:*:*:* Versions 28 Vulnerable ·Fedoraproject
- cpe:2.3:o:fedoraproject:fedora:29:*:*:*:*:*:*:* Versions 29 Vulnerable ·Fedoraproject
- cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:* Versions 30 Vulnerable ·Fedoraproject
- cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* Versions 14.04 Vulnerable ·Canonical
- cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* Versions 16.04 Vulnerable ·Canonical
Remediation
Red Hat 5 advisories
- RHSA-2020:0250 Released 2020-01-27 · Red Hat rating LowRed Hat JBoss Core Services Apache HTTP Server 2.4.37 SP1 Security Update
- Red Hat JBoss Core Services on RHEL 6 Server jbcs-httpd24-apr-1.6.3-73.jbcs.el6, jbcs-httpd24-apr-devel-1.6.3-73.jbcs.el6, jbcs-httpd24-apr-util-1.6.1-54.jbcs.el6 +38
- Red Hat JBoss Core Services on RHEL 7 Server jbcs-httpd24-apr-1.6.3-73.jbcs.el7, jbcs-httpd24-apr-devel-1.6.3-73.jbcs.el7, jbcs-httpd24-apr-util-1.6.1-54.jbcs.el7 +38
- RHSA-2020:0251 Released 2020-01-27 · Red Hat rating LowRed Hat JBoss Core Services Apache HTTP Server 2.4.37 SP1 Security Update
- Red Hat JBoss Core Services
- RHSA-2019:4126 Released 2019-12-10 · Red Hat rating Moderatehttpd24-httpd security, bug fix, and enhancement update
- Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 6) httpd24-1.1-19.el6, httpd24-build-1.1-19.el6, httpd24-httpd-2.4.34-15.el6 +12
- Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7) httpd24-1.1-19.el7, httpd24-httpd-2.4.34-15.el7, httpd24-httpd-devel-2.4.34-15.el7 +12
- Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.5) httpd24-1.1-19.el7, httpd24-httpd-2.4.34-15.el7, httpd24-httpd-devel-2.4.34-15.el7 +12
- Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.6) httpd24-1.1-19.el7, httpd24-httpd-2.4.34-15.el7, httpd24-httpd-devel-2.4.34-15.el7 +12
- Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.7) httpd24-1.1-19.el7, httpd24-httpd-2.4.34-15.el7, httpd24-httpd-devel-2.4.34-15.el7 +12
- Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 6) httpd24-1.1-19.el6, httpd24-build-1.1-19.el6, httpd24-httpd-2.4.34-15.el6 +12
- Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7) httpd24-1.1-19.el7, httpd24-httpd-2.4.34-15.el7, httpd24-httpd-devel-2.4.34-15.el7 +12
Show 2 more Red Hat advisories
- RHSA-2019:3436 Released 2019-11-05 · Red Hat rating Moderatehttpd:2.4 security and bug fix update
- Red Hat Enterprise Linux AppStream (v. 8) httpd-2.4.37-16.module+el8.1.0+4134+e6bad0ed.aarch64::httpd:2.4, httpd-2.4.37-16.module+el8.1.0+4134+e6bad0ed.ppc64le::httpd:2.4, httpd-2.4.37-16.module+el8.1.0+4134+e6bad0ed.s390x::httpd:2.4 +37
- RHSA-2019:2343 Released 2019-08-06 · Red Hat rating Moderatehttpd security and bug fix update
- Red Hat Enterprise Linux Client Optional (v. 7) httpd-2.4.6-90.el7, httpd-devel-2.4.6-90.el7, httpd-manual-2.4.6-90.el7 +5
- Red Hat Enterprise Linux ComputeNode Optional (v. 7) httpd-2.4.6-90.el7, httpd-devel-2.4.6-90.el7, httpd-manual-2.4.6-90.el7 +5
- Red Hat Enterprise Linux Server (v. 7) httpd-2.4.6-90.el7, httpd-devel-2.4.6-90.el7, httpd-manual-2.4.6-90.el7 +3
- Red Hat Enterprise Linux Server Optional (v. 7) mod_ldap-2.4.6-90.el7, mod_proxy_html-1:2.4.6-90.el7
- Red Hat Enterprise Linux Workstation (v. 7) httpd-2.4.6-90.el7, httpd-devel-2.4.6-90.el7, httpd-manual-2.4.6-90.el7 +3
- Red Hat Enterprise Linux Workstation Optional (v. 7) mod_ldap-2.4.6-90.el7, mod_proxy_html-1:2.4.6-90.el7
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 5 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat JBoss Enterprise Web Server 2 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux AppStream (v. 8) | Fixed | RHSA-2019:3436 |
| Red Hat Enterprise Linux Client Optional (v. 7) | Fixed | RHSA-2019:2343 |
| Red Hat Enterprise Linux ComputeNode Optional (v. 7) | Fixed | RHSA-2019:2343 |
| Red Hat Enterprise Linux Server (v. 7) | Fixed | RHSA-2019:2343 |
| Red Hat Enterprise Linux Server Optional (v. 7) | Fixed | RHSA-2019:2343 |
| Red Hat Enterprise Linux Workstation (v. 7) | Fixed | RHSA-2019:2343 |
| Red Hat Enterprise Linux Workstation Optional (v. 7) | Fixed | RHSA-2019:2343 |
| Red Hat JBoss Core Services | Fixed | RHSA-2020:0251 |
| Red Hat JBoss Core Services on RHEL 6 Server | Fixed | RHSA-2020:0250 |
| Red Hat JBoss Core Services on RHEL 7 Server | Fixed | RHSA-2020:0250 |
| Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 6) | Fixed | RHSA-2019:4126 |
| Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7) | Fixed | RHSA-2019:4126 |
| Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.5) | Fixed | RHSA-2019:4126 |
| Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.6) | Fixed | RHSA-2019:4126 |
| Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.7) | Fixed | RHSA-2019:4126 |
| Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 6) | Fixed | RHSA-2019:4126 |
| Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7) | Fixed | RHSA-2019:4126 |
Not affected: 1 product
- Red Hat Virtualization 4
Timeline
- 2026-10-02 Threatist record created from CVE-2019-0220
- 2026-10-03 Alias added: GHSA-mfx7-67r8-jcfr
References
Advisory 15
- [oss-security] 20190401 CVE-2019-0220: URL normalization inconsistincies
- 20190403 [SECURITY] [DSA 4422-1] apache2 security update
- [debian-lts-announce] 20190403 [SECURITY] [DLA 1748-1] apache2 security update
- USN-3937-1
- FEDORA-2019-cf7695b470
- DSA-4422
- FEDORA-2019-119b14075a
- FEDORA-2019-a4ed7400f4
- RHSA-2019:2343
- RHSA-2019:3436
- RHSA-2019:4126
- RHSA-2020:0250
- RHSA-2020:0251
- https://httpd.apache.org/security/vulnerabilities_24.html
- https://support.f5.com/csp/article/K44591505
Other 21
- [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
- [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
- [httpd-bugs] 20200325 [Bug 63437] MergeSlashes option breaks protocol specifier in URIs
- [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
- [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://www.oracle.com/security-alerts/cpuapr2020.html
- https://www.oracle.com/security-alerts/cpujul2020.html
- https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html
- https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html
- https://security.netapp.com/advisory/ntap-20190625-0007/
- https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03950en_us
- [httpd-cvs] 20210330 svn commit: r1073139 [1/13] - in /websites/staging/httpd/trunk/content: ./ security/json/
- [httpd-cvs] 20210330 svn commit: r1073143 [3/3] - in /websites/staging/httpd/trunk/content: ./ security/
- [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
- [httpd-cvs] 20210330 svn commit: r1073139 [12/13] - in /websites/staging/httpd/trunk/content: ./ security/json/
- [httpd-cvs] 20210330 svn commit: r1888194 [12/13] - /httpd/site/trunk/content/security/json/
- [httpd-cvs] 20210330 svn commit: r1073149 [1/13] - in /websites/staging/httpd/trunk/content: ./ security/ security/json/
- [httpd-cvs] 20210330 svn commit: r1073149 [12/13] - in /websites/staging/httpd/trunk/content: ./ security/ security/json/
- [httpd-cvs] 20210603 svn commit: r1075360 [3/3] - in /websites/staging/httpd/trunk/content: ./ security/json/CVE-2021-31618.json security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilities_24.html
- [httpd-cvs] 20210606 svn commit: r1075470 [4/4] - 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://www.oracle.com/security-alerts/cpujul2022.html
More Apache Http Server vulnerabilities
- TI-2021-18535 Path Traversal and Remote Code Execution in Apache HTTP Server 2.4.49 and 2.4.50 (incomplete fix of CVE-2021-41773) KEVCVSS 3.1CRITICAL 9.8
- TI-2021-18417 Path traversal and file disclosure vulnerability in Apache HTTP Server 2.4.49 KEVCVSS 3.1CRITICAL 9.8
- TI-2024-25716 Apache HTTP Server weakness in mod_rewrite when first segment of substitution matches filesystem path. KEVCVSS 3.1CRITICAL 9.1
- TI-2021-17490 mod_proxy SSRF KEVCVSS 3.1CRITICAL 9.0
- TI-2019-00184 Use after free in Apache HTTP Server KEVCVSS 3.1HIGH 7.8
- TI-2009-03392 The TLS protocol, and the SSL protocol 3.0 and possibly earlier, as used in Microsoft… CVSS 3.1CRITICAL 9.8
Sources
- CVE-2019-0220 · CVE Program
- CVE-2019-0220 · NVD
- FIRST EPSS
- GHSA-mfx7-67r8-jcfr · GitHub Advisory Database · CC BY 4.0
- CVE-2019-0220 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences