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TI-2025-31619 Aliases CVE-2025-49630GHSA-72h2-3r97-f454

Apache HTTP Server: mod_proxy_http2 denial of service

Priority MEDIUM 42CWE-617Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 16 fixed, 1 without a fix

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat. Impact type from CWE-617.

Summary

In certain proxy configurations, a denial of service attack against Apache HTTP Server versions 2.4.26 through to 2.4.63 can be triggered by untrusted clients causing an assertion in mod_proxy_http2. Configurations affected are a reverse proxy is configured for an HTTP/2 backend, with ProxyPreserveHost set to "on".

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01352 71st percentileScored 2026-11-07
Fix Partial Red Hat: 12 advisoriesRed Hat: 16 fixed, 1 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 Server2.4.26 – 2.4.63—No fix listedCNA
  • Apache HTTP Server VendorApache Affected 2.4.26 – 2.4.63 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*2.4.26 to before 2.4.64VulnerableApache
  • cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:* Versions 2.4.26 to before 2.4.64 Vulnerable ·Apache

Remediation

Red Hat 12 advisories

  • RHSA-2025:15727 Released 2025-09-15 · Red Hat rating Moderate
    mod_http2 security update
    • Red Hat Enterprise Linux AppStream EUS (v.9.4) mod_http2-2.0.26-2.el9_4.2
  • RHSA-2025:15726 Released 2025-09-15 · Red Hat rating Moderate
    mod_http2 security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.2) mod_http2-1.15.19-4.el9_2.7
  • RHSA-2025:15725 Released 2025-09-15 · Red Hat rating Moderate
    mod_http2 security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.0) mod_http2-1.15.19-3.el9_0.7
Show 9 more Red Hat advisories
  • RHSA-2025:15698 Released 2025-09-11 · Red Hat rating Moderate
    httpd:2.4 security update
    • Red Hat Enterprise Linux AppStream AUS (v.8.6) httpd-2.4.37-47.module+el8.6.0+23463+5d5709c6.11.src::httpd:2.4, httpd-2.4.37-47.module+el8.6.0+23463+5d5709c6.11.x86_64::httpd:2.4, httpd-devel-2.4.37-47.module+el8.6.0+23463+5d5709c6.11.x86_64::httpd:2.4 +11
    • Red Hat Enterprise Linux AppStream E4S (v.8.6) httpd-2.4.37-47.module+el8.6.0+23463+5d5709c6.11.aarch64::httpd:2.4, httpd-2.4.37-47.module+el8.6.0+23463+5d5709c6.11.ppc64le::httpd:2.4, httpd-2.4.37-47.module+el8.6.0+23463+5d5709c6.11.s390x::httpd:2.4 +38
    • Red Hat Enterprise Linux AppStream TUS (v.8.6) httpd-2.4.37-47.module+el8.6.0+23463+5d5709c6.11.src::httpd:2.4, httpd-2.4.37-47.module+el8.6.0+23463+5d5709c6.11.x86_64::httpd:2.4, httpd-devel-2.4.37-47.module+el8.6.0+23463+5d5709c6.11.x86_64::httpd:2.4 +11
  • RHSA-2025:15684 Released 2025-09-11 · Red Hat rating Moderate
    httpd:2.4 security update
    • Red Hat Enterprise Linux AppStream AUS (v.8.4) httpd-2.4.37-39.module+el8.4.0+23462+1fa78ba3.10.src::httpd:2.4, httpd-2.4.37-39.module+el8.4.0+23462+1fa78ba3.10.x86_64::httpd:2.4, httpd-devel-2.4.37-39.module+el8.4.0+23462+1fa78ba3.10.x86_64::httpd:2.4 +11
    • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) httpd-2.4.37-39.module+el8.4.0+23462+1fa78ba3.10.src::httpd:2.4, httpd-2.4.37-39.module+el8.4.0+23462+1fa78ba3.10.x86_64::httpd:2.4, httpd-devel-2.4.37-39.module+el8.4.0+23462+1fa78ba3.10.x86_64::httpd:2.4 +11
  • RHSA-2025:15619 Released 2025-09-10 · Red Hat rating Moderate
    httpd:2.4 security update
    • Red Hat Enterprise Linux AppStream E4S (v.8.8) httpd-2.4.37-56.module+el8.8.0+23464+a2e0c444.10.ppc64le::httpd:2.4, httpd-2.4.37-56.module+el8.8.0+23464+a2e0c444.10.src::httpd:2.4, httpd-2.4.37-56.module+el8.8.0+23464+a2e0c444.10.x86_64::httpd:2.4 +20
  • RHSA-2025:15516 Released 2025-09-08 · Red Hat rating Moderate
    httpd:2.4 security update
    • Red Hat Enterprise Linux AppStream AUS (v. 8.2) httpd-2.4.37-21.module+el8.2.0+23461+1d03af5c.10.src::httpd:2.4, httpd-2.4.37-21.module+el8.2.0+23461+1d03af5c.10.x86_64::httpd:2.4, httpd-devel-2.4.37-21.module+el8.2.0+23461+1d03af5c.10.x86_64::httpd:2.4 +11
  • RHSA-2025:15123 Released 2025-09-03 · Red Hat rating Moderate
    httpd:2.4 security update
    • Red Hat Enterprise Linux AppStream (v. 8) httpd-2.4.37-65.module+el8.10.0+23369+11a81384.5.aarch64::httpd:2.4, httpd-2.4.37-65.module+el8.10.0+23369+11a81384.5.ppc64le::httpd:2.4, httpd-2.4.37-65.module+el8.10.0+23369+11a81384.5.s390x::httpd:2.4 +38
  • RHSA-2025:14983 Released 2025-09-02 · Red Hat rating Moderate
    mod_http2 security update
    • Red Hat Enterprise Linux AppStream (v. 9) mod_http2-2.0.26-4.el9_6.1
  • RHSA-2025:14625 Released 2025-08-26 · Red Hat rating Moderate
    mod_http2 security update
    • Red Hat Enterprise Linux AppStream (v. 10) mod_http2-2.0.29-2.el10_0.1
  • RHSA-2025:13681 Released 2025-08-14 · Red Hat rating Important
    Red Hat JBoss Core Services Apache HTTP Server 2.4.62 SP1 security update
    • Red Hat JBoss Core Services 2.4.62.SP1
  • RHSA-2025:13680 Released 2025-08-14 · Red Hat rating Important
    Red Hat JBoss Core Services Apache HTTP Server 2.4.62 SP1 security update
    • Red Hat JBoss Core Services on RHEL 7 Server jbcs-httpd24-httpd-2.4.62-8.el7jbcs, jbcs-httpd24-httpd-devel-2.4.62-8.el7jbcs, jbcs-httpd24-httpd-manual-2.4.62-8.el7jbcs +12
    • Red Hat JBoss Core Services on RHEL 8 jbcs-httpd24-httpd-2.4.62-8.el8jbcs, jbcs-httpd24-httpd-devel-2.4.62-8.el8jbcs, jbcs-httpd24-httpd-manual-2.4.62-8.el8jbcs +12

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat JBoss Core ServicesAffectedNo fix yet
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2025:14625
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2025:15123
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2025:14983
Red Hat Enterprise Linux AppStream AUS (v. 8.2)Fixed RHSA-2025:15516
Red Hat Enterprise Linux AppStream AUS (v.8.4)Fixed RHSA-2025:15684
Red Hat Enterprise Linux AppStream AUS (v.8.6)Fixed RHSA-2025:15698
Red Hat Enterprise Linux AppStream E4S (v.8.6)Fixed RHSA-2025:15698
Red Hat Enterprise Linux AppStream E4S (v.8.8)Fixed RHSA-2025:15619
Red Hat Enterprise Linux AppStream E4S (v.9.0)Fixed RHSA-2025:15725
Red Hat Enterprise Linux AppStream E4S (v.9.2)Fixed RHSA-2025:15726
Red Hat Enterprise Linux AppStream EUS (v.9.4)Fixed RHSA-2025:15727
Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)Fixed RHSA-2025:15684
Red Hat Enterprise Linux AppStream TUS (v.8.6)Fixed RHSA-2025:15698
Red Hat JBoss Core Services 2.4.62.SP1Fixed RHSA-2025:13681
Red Hat JBoss Core Services on RHEL 7 ServerFixed RHSA-2025:13680
Red Hat JBoss Core Services on RHEL 8Fixed RHSA-2025:13680
Not affected: 4 products
  • Red Hat Enterprise Linux 10
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 9

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-49630
  2. 2026-10-03 Alias added: GHSA-72h2-3r97-f454
  3. 2026-10-09 Fix available: RHSA-2025:13681 · Red Hat
  4. 2026-10-21 Fix available: Red Hat JBoss Core Services 2.4.62.SP1 · Red Hat

References

Advisory 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

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