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TI-2023-12247 Aliases CVE-2023-27522GHSA-vcph-37mh-fqrh

Apache HTTP Server: mod_proxy_uwsgi HTTP response splitting

Priority MEDIUM 43CWE-444Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · High · None
Fix status
Partial Red Hat: 7 fixed, 3 without a fix

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

Summary

HTTP Response Smuggling vulnerability in Apache HTTP Server via mod_proxy_uwsgi. This issue affects Apache HTTP Server: from 2.4.30 through 2.4.55. Special characters in the origin response header can truncate/split the response forwarded to the client.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.02134 82nd percentileScored 2026-11-07
Fix Partial uWSGI (PyPI): 2.0.22Red Hat: 6 advisoriesRed Hat: 7 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 Server2.4.30 – 2.4.55—No fix listedCNA
—uWSGI (PyPI)before 2.0.222.0.22Patch availableGHSA-vcph-37mh-fqrh
  • Apache HTTP Server VendorApache Affected 2.4.30 – 2.4.55 Fixed in — No fix listed CNA
  • uWSGI (PyPI) Vendor— Affected before 2.0.22 Fixed in 2.0.22 Patch available GHSA-vcph-37mh-fqrh

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*2.4.30 to before 2.4.56VulnerableApache
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*10.0VulnerableDebian
cpe:2.3:a:unbit:uwsgi:*:*:*:*:*:*:*:*before 2.0.22VulnerableUnbit
  • cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:* Versions 2.4.30 to before 2.4.56 Vulnerable ·Apache
  • cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* Versions 10.0 Vulnerable ·Debian
  • cpe:2.3:a:unbit:uwsgi:*:*:*:*:*:*:*:* Versions before 2.0.22 Vulnerable ·Unbit

Remediation

  • Fix · GHSA-vcph-37mh-fqrh uWSGI (PyPI) Fixed in 2.0.22 Advisory →

Red Hat 6 advisories

  • RHSA-2024:4504 Released 2024-07-11 · Red Hat rating Moderate
    httpd security update
    • Red Hat Enterprise Linux AppStream EUS (v.9.2) httpd-2.4.53-11.el9_2.6, httpd-core-2.4.53-11.el9_2.6, httpd-devel-2.4.53-11.el9_2.6 +8
  • RHSA-2023:6403 Released 2023-11-07 · Red Hat rating Moderate
    httpd and mod_http2 security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream (v. 9) httpd-2.4.57-5.el9, httpd-core-2.4.57-5.el9, httpd-devel-2.4.57-5.el9 +8
  • RHSA-2023:5050 Released 2023-09-11 · Red Hat rating Moderate
    httpd:2.4 security update
    • Red Hat Enterprise Linux AppStream (v. 8) httpd-2.4.37-56.module+el8.8.0+19808+379766d6.7.aarch64::httpd:2.4, httpd-2.4.37-56.module+el8.8.0+19808+379766d6.7.ppc64le::httpd:2.4, httpd-2.4.37-56.module+el8.8.0+19808+379766d6.7.s390x::httpd:2.4 +38
Show 3 more Red Hat advisories
  • RHSA-2023:5049 Released 2023-09-11 · Red Hat rating Moderate
    httpd:2.4 security update
    • Red Hat Enterprise Linux AppStream EUS (v.8.6) httpd-2.4.37-47.module+el8.6.0+19809+6e655c60.7.aarch64::httpd:2.4, httpd-2.4.37-47.module+el8.6.0+19809+6e655c60.7.ppc64le::httpd:2.4, httpd-2.4.37-47.module+el8.6.0+19809+6e655c60.7.s390x::httpd:2.4 +38
  • 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

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux 6AffectedNo fix planned: Out of support scope
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 Enterprise Linux AppStream (v. 8)Fixed RHSA-2023:5050
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2023:6403
Red Hat Enterprise Linux AppStream EUS (v.8.6)Fixed RHSA-2023:5049
Red Hat Enterprise Linux AppStream EUS (v.9.2)Fixed RHSA-2024:4504
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: 4 products
  • Red Hat Enterprise Linux AppStream (v. 9)
  • Red Hat JBoss Core Services on RHEL 7 Server
  • Red Hat JBoss Core Services on RHEL 8
  • Red Hat Software Collections

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-27522
  2. 2026-10-03 Alias added: GHSA-vcph-37mh-fqrh
  3. 2026-10-09 Fix available: RHSA-2023:4628 · Red Hat
  4. 2026-11-07 Fix available: Red Hat JBoss Core Services 2.4.57 · Red Hat

References

Advisory 4

Other 5

  • 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

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences