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TI-2022-20475 Aliases CVE-2022-42252GHSA-p22x-g9px-3945

Apache Tomcat request smuggling via malformed content-length

Priority MEDIUM 42CWE-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: 4 fixed, 1 without a fix

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

Summary

If Apache Tomcat 8.5.0 to 8.5.82, 9.0.0-M1 to 9.0.67, 10.0.0-M1 to 10.0.26 or 10.1.0-M1 to 10.1.0 was configured to ignore invalid HTTP headers via setting rejectIllegalHeader to false (the default for 8.5.x only), Tomcat did not reject a request containing an invalid Content-Length header making a request smuggling attack possible if Tomcat was located behind a reverse proxy that also failed to reject the request with the invalid header.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0178 78th percentileScored 2026-11-07
Fix Partial org.apache.tomcat.embed:tomcat-embed-core (Maven): 8.5.83, 9.0.68, 10.0.27 +1org.apache.tomcat:tomcat-coyote (Maven): 9.0.68, 10.0.27, 10.1.1Red Hat: 2 advisoriesRed Hat: 4 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 Tomcat10.1.0-M1 – 10.1.0; 10.0.0-M1 – 10.0.26; 9.0.0-M1 – 9.0.67; 8.5.0 – 8.5.82—No fix listedCNA
—org.apache.tomcat.embed:tomcat-embed-core (Maven)8.5.0 to before 8.5.838.5.83Patch availableGHSA-p22x-g9px-3945
—org.apache.tomcat.embed:tomcat-embed-core (Maven)9.0.0-M1 to before 9.0.689.0.68Patch availableGHSA-p22x-g9px-3945
—org.apache.tomcat.embed:tomcat-embed-core (Maven)10.0.0-M1 to before 10.0.2710.0.27Patch availableGHSA-p22x-g9px-3945
—org.apache.tomcat.embed:tomcat-embed-core (Maven)10.1.0-M1 to before 10.1.110.1.1Patch availableGHSA-p22x-g9px-3945
—org.apache.tomcat:tomcat-coyote (Maven)9.0.0-M1 to before 9.0.689.0.68Patch availableGHSA-p22x-g9px-3945
—org.apache.tomcat:tomcat-coyote (Maven)10.0.0-M1 to before 10.0.2710.0.27Patch availableGHSA-p22x-g9px-3945
—org.apache.tomcat:tomcat-coyote (Maven)10.1.0-M1 to before 10.1.110.1.1Patch availableGHSA-p22x-g9px-3945
  • Apache Tomcat VendorApache Affected 10.1.0-M1 – 10.1.0; 10.0.0-M1 – 10.0.26; 9.0.0-M1 – 9.0.67; 8.5.0 – 8.5.82 Fixed in — No fix listed CNA
  • org.apache.tomcat.embed:tomcat-embed-core (Maven) Vendor— Affected 8.5.0 to before 8.5.83 Fixed in 8.5.83 Patch available GHSA-p22x-g9px-3945
  • org.apache.tomcat.embed:tomcat-embed-core (Maven) Vendor— Affected 9.0.0-M1 to before 9.0.68 Fixed in 9.0.68 Patch available GHSA-p22x-g9px-3945
  • org.apache.tomcat.embed:tomcat-embed-core (Maven) Vendor— Affected 10.0.0-M1 to before 10.0.27 Fixed in 10.0.27 Patch available GHSA-p22x-g9px-3945
  • org.apache.tomcat.embed:tomcat-embed-core (Maven) Vendor— Affected 10.1.0-M1 to before 10.1.1 Fixed in 10.1.1 Patch available GHSA-p22x-g9px-3945
  • org.apache.tomcat:tomcat-coyote (Maven) Vendor— Affected 9.0.0-M1 to before 9.0.68 Fixed in 9.0.68 Patch available GHSA-p22x-g9px-3945
  • org.apache.tomcat:tomcat-coyote (Maven) Vendor— Affected 10.0.0-M1 to before 10.0.27 Fixed in 10.0.27 Patch available GHSA-p22x-g9px-3945
  • org.apache.tomcat:tomcat-coyote (Maven) Vendor— Affected 10.1.0-M1 to before 10.1.1 Fixed in 10.1.1 Patch available GHSA-p22x-g9px-3945

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*8.5.0 to before 8.5.83; 9.0.0 to before 9.0.68; 10.0.0 to before 10.0.27; 10.1.0 to before 10.1.1VulnerableApache
  • cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:* Versions 8.5.0 to before 8.5.83; 9.0.0 to before 9.0.68; 10.0.0 to before 10.0.27; 10.1.0 to before 10.1.1 Vulnerable ·Apache

Remediation

  • Fix · GHSA-p22x-g9px-3945 org.apache.tomcat.embed:tomcat-embed-core (Maven) Fixed in 8.5.83 Advisory →
  • Fix · GHSA-p22x-g9px-3945 org.apache.tomcat.embed:tomcat-embed-core (Maven) Fixed in 9.0.68 Advisory →
  • Fix · GHSA-p22x-g9px-3945 org.apache.tomcat.embed:tomcat-embed-core (Maven) Fixed in 10.0.27 Advisory →
  • Fix · GHSA-p22x-g9px-3945 org.apache.tomcat.embed:tomcat-embed-core (Maven) Fixed in 10.1.1 Advisory →
  • Fix · GHSA-p22x-g9px-3945 org.apache.tomcat:tomcat-coyote (Maven) Fixed in 9.0.68 Advisory →
  • Fix · GHSA-p22x-g9px-3945 org.apache.tomcat:tomcat-coyote (Maven) Fixed in 10.0.27 Advisory →
  • Fix · GHSA-p22x-g9px-3945 org.apache.tomcat:tomcat-coyote (Maven) Fixed in 10.1.1 Advisory →

Red Hat 2 advisories

  • RHSA-2023:1664 Released 2023-04-12 · Red Hat rating Low
    Red Hat JBoss Web Server 5.7.2 release and security update
    • Red Hat JBoss Web Server 5
  • RHSA-2023:1663 Released 2023-04-12 · Red Hat rating Low
    Red Hat JBoss Web Server 5.7.2 release and security update
    • Red Hat JBoss Web Server 5.7 for RHEL 7 Server jws5-tomcat-9.0.62-13.redhat_00011.1.el7jws, jws5-tomcat-admin-webapps-9.0.62-13.redhat_00011.1.el7jws, jws5-tomcat-docs-webapp-9.0.62-13.redhat_00011.1.el7jws +9
    • Red Hat JBoss Web Server 5.7 for RHEL 8 jws5-tomcat-9.0.62-13.redhat_00011.1.el8jws, jws5-tomcat-admin-webapps-9.0.62-13.redhat_00011.1.el8jws, jws5-tomcat-docs-webapp-9.0.62-13.redhat_00011.1.el8jws +7
    • Red Hat JBoss Web Server 5.7 for RHEL 9 jws5-tomcat-9.0.62-13.redhat_00011.1.el9jws, jws5-tomcat-admin-webapps-9.0.62-13.redhat_00011.1.el9jws, jws5-tomcat-docs-webapp-9.0.62-13.redhat_00011.1.el9jws +7

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat JBoss Web Server 3AffectedNo fix planned: Out of support scope
Red Hat JBoss Web Server 5Fixed RHSA-2023:1664
Red Hat JBoss Web Server 5.7 for RHEL 7 ServerFixed RHSA-2023:1663
Red Hat JBoss Web Server 5.7 for RHEL 8Fixed RHSA-2023:1663
Red Hat JBoss Web Server 5.7 for RHEL 9Fixed RHSA-2023:1663
Not affected: 4 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9

Timeline

  1. 2026-10-02 Threatist record created from CVE-2022-42252
  2. 2026-10-03 Alias added: GHSA-p22x-g9px-3945

References

Advisory 2

Other 9

  • TI-2025-18529 Apache Tomcat: Potential RCE and/or information disclosure and/or information corruption with partial PUT KEVCVSS 3.1CRITICAL 10.0
  • TI-2020-01862 Improper privilege management in Apache Tomcat KEVCVSS 3.1CRITICAL 9.8
  • TI-2016-07192 Improper access control in Apache Tomcat KEVCVSS 3.1CRITICAL 9.8
  • TI-2017-09342 Unrestricted file upload in Apache Tomcat KEVCVSS 3.1HIGH 8.1
  • TI-2017-09340 Unrestricted file upload in Apache Tomcat KEVCVSS 3.1HIGH 8.1
  • TI-2026-26741 Apache Tomcat: Fix for CVE-2026-29146 allowed bypass of EncryptInterceptor KEVCVSS 3.1HIGH 7.5
See all 273 →

Sources

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