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TI-2022-17500 Aliases CVE-2022-37436GHSA-3f78-wq4j-7vgr

Apache HTTP Server: mod_proxy prior to 2.4.55 allows a backend to trigger HTTP response splitting

Priority MEDIUM 62CWE-113Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · Low · None
Fix status
Partial Red Hat: 5 fixed, 3 without a fix

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat.

Summary

Prior to Apache HTTP Server 2.4.55, a malicious backend can cause the response headers to be truncated early, resulting in some headers being incorporated into the response body. If the later headers have any security purpose, they will not be interpreted by the client.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.52718 98th percentileScored 2026-11-07
Fix Partial Apache HTTP Server (Apache Software Foundation): 2.4.55Red Hat: 4 advisoriesRed Hat: 5 fixed, 3 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ApacheApache HTTP Serverbefore 2.4.552.4.55Patch availableCNA
  • Apache HTTP Server VendorApache Affected before 2.4.55 Fixed in 2.4.55 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*before 2.4.55VulnerableApache
  • cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:* Versions before 2.4.55 Vulnerable ·Apache

Remediation

  • Fix · CNA Apache HTTP Server (Apache Software Foundation) Fixed in 2.4.55

Red Hat 4 advisories

  • RHSA-2023:4629 Released 2023-08-15 · Red Hat rating Moderate
    Red Hat JBoss Core Services Apache HTTP Server 2.4.57 security update
    • Red Hat JBoss Core Services on RHEL 7 Server jbcs-httpd24-apr-1.7.0-8.el7jbcs, jbcs-httpd24-apr-devel-1.7.0-8.el7jbcs, jbcs-httpd24-curl-8.2.1-1.el7jbcs +12
    • Red Hat JBoss Core Services on RHEL 8 jbcs-httpd24-apr-1.7.0-8.el8jbcs, jbcs-httpd24-apr-devel-1.7.0-8.el8jbcs, jbcs-httpd24-curl-8.2.1-1.el8jbcs +12
  • RHSA-2023:4628 Released 2023-08-15 · Red Hat rating Moderate
    Red Hat JBoss Core Services Apache HTTP Server 2.4.57 security update
    • Red Hat JBoss Core Services 2.4.57
  • RHSA-2023:0970 Released 2023-02-28 · Red Hat rating Moderate
    httpd security and bug fix update
    • Red Hat Enterprise Linux AppStream (v. 9) httpd-2.4.53-7.el9_1.1, httpd-core-2.4.53-7.el9_1.1, httpd-devel-2.4.53-7.el9_1.1 +8
Show 1 more Red Hat advisories
  • RHSA-2023:0852 Released 2023-02-21 · Red Hat rating Moderate
    httpd:2.4 security and bug fix update
    • Red Hat Enterprise Linux AppStream (v. 8) httpd-2.4.37-51.module+el8.7.0+18026+7b169787.1.aarch64::httpd:2.4, httpd-2.4.37-51.module+el8.7.0+18026+7b169787.1.ppc64le::httpd:2.4, httpd-2.4.37-51.module+el8.7.0+18026+7b169787.1.s390x::httpd:2.4 +38

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 7AffectedNo fix planned: Out of support scope
Red Hat JBoss Enterprise Application Platform 6AffectedNo fix planned: Out of support scope
Red Hat Software CollectionsAffectedNo fix planned: Will not fix
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2023:0852
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2023:0970
Red Hat JBoss Core Services 2.4.57Fixed RHSA-2023:4628
Red Hat JBoss Core Services on RHEL 7 ServerFixed RHSA-2023:4629
Red Hat JBoss Core Services on RHEL 8Fixed RHSA-2023:4629
Not affected: 3 products
  • Red Hat Enterprise Linux 6
  • Red Hat JBoss Core Services on RHEL 7 Server
  • Red Hat JBoss Core Services on RHEL 8

Timeline

  1. 2026-10-02 Threatist record created from CVE-2022-37436
  2. 2026-10-03 Alias added: GHSA-3f78-wq4j-7vgr
  3. 2026-10-09 Fix available: RHSA-2023:4628 · Red Hat
  4. 2026-11-05 EPSS moved to the 95th–99th percentile
  5. 2026-11-05 Fix available: Red Hat JBoss Core Services 2.4.57 · Red Hat

References

Advisory 1

Other 1

  • 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
See all 349 →

Sources

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