Read the docs
TI-2026-76827 Aliases CVE-2026-88041GHSA-f6r2-3pj4-jmqq

Trailer data leaks between requests in Apache Tomcat HTTP/2

Priority LOW 39CWE-459Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · None · None
Fix status
Partial Red Hat: 1 fixed, 5 without a fix

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

Summary

Apache Tomcat from 11.0.0-M23 through 11.0.26, from 10.1.27 through 10.1.60, and from 9.0.92 through 9.0.122 is affected. An incomplete cleanup of request state (CWE-459) lets trailer information from a previous request leak into a subsequent request. A remote attacker without privileges or user interaction can read that trailer data, which compromises confidentiality.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

Incomplete cleanup vulnerability in Apache Tomcat allowed an trailer information from a previous request to leak into a subsequent request. This issue affects Apache Tomcat: from 11.0.0-M23 through 11.0.26, from 10.1.27 through 10.1.60, from 9.0.92 through 9.0.122. Users are recommended to upgrade to version 11.0.27, 10.1.61 or 9.0.123, which fix the issue.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00514 44th percentileScored 2026-11-07
Fix Partial Red Hat: 2 advisoriesRed Hat: 1 fixed, 5 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 Tomcat11.0.0-M23 – 11.0.26; 10.1.27 – 10.1.60; 9.0.92 – 9.0.122—No fix listedCNA
  • Apache Tomcat VendorApache Affected 11.0.0-M23 – 11.0.26; 10.1.27 – 10.1.60; 9.0.92 – 9.0.122 Fixed in — No fix listed CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*——Apache
  • cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:* Versions — — ·Apache

Remediation

Upgrade Apache Tomcat to 11.0.27, 10.1.61 or 9.0.123, which fix the issue. Red Hat fixes Red Hat Hardened Images in RHSA-2026:85926 and RHSA-2026:81365. Red Hat has no fix available for Red Hat Enterprise Linux 8, 9 and 10 or Red Hat JBoss Web Server 6 and 7.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Red Hat 2 advisories

  • RHSA-2026:85926 Released 2026-10-20 · Red Hat rating Important
    Red Hat Hardened Images RPMs bug fix and enhancement update
    • Red Hat Hardened Images tomcat10-10.1.61-0.1.hum1@noarch@public-hummingbird-aarch64-rpms, tomcat10-10.1.61-0.1.hum1@noarch@public-hummingbird-s390x-rpms, tomcat10-10.1.61-0.1.hum1@noarch@public-hummingbird-x86_64-rpms +28
  • RHSA-2026:81365 Released 2026-10-12 · Red Hat rating Important
    Red Hat Hardened Images RPMs bug fix and enhancement update
    • Red Hat Hardened Images tomcat11-11.0.27-0.1.hum1@noarch@public-hummingbird-aarch64-rpms, tomcat11-11.0.27-0.1.hum1@noarch@public-hummingbird-s390x-rpms, tomcat11-11.0.27-0.1.hum1@noarch@public-hummingbird-x86_64-rpms +28

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux 10AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 8AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 9AffectedNo fix yet: Fix deferred
Red Hat JBoss Web Server 6AffectedNo fix yet: Fix deferred
Red Hat JBoss Web Server 7AffectedNo fix yet: Fix deferred
Red Hat Hardened ImagesFixed RHSA-2026:81365, RHSA-2026:85926
Not affected: 6 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9
  • Red Hat Hardened Images
  • Red Hat JBoss Web Server 5

Timeline

  1. 2026-10-20 Threatist record created from CVE-2026-88041
  2. 2026-10-20 Alias added: GHSA-f6r2-3pj4-jmqq
  3. 2026-10-21 Fix available: RHSA-2026:85926 · Red Hat
  4. 2026-10-21 Fix available: RHSA-2026:81365 · Red Hat
  5. 2026-10-21 Fix available: Red Hat Hardened Images · Red Hat
  6. 2026-10-22 Affected versions changed · Red Hat
  7. 2026-10-22 CVSS score added · Red Hat
  8. 2026-10-29 CVSS score added · CISA ADP
  9. 2026-10-29 CISA SSVC decision points changed

References

Advisory 1

  • TI-2025-18529 Apache Tomcat: Potential RCE and/or information disclosure and/or information corruption with partial PUT KEVCVSS 3.1CRITICAL 10.0
  • TI-2024-30292 Apache OFBiz: Confused controller-view authorization logic (forced browsing) KEVCVSS 3.1CRITICAL 9.8
  • TI-2024-26062 Apache OFBiz: Unauthenticated endpoint could allow execution of screen rendering code KEVCVSS 3.1CRITICAL 9.8
  • TI-2024-21190 Apache OFBiz: Path traversal leading to RCE KEVCVSS 3.1CRITICAL 9.8
  • TI-2024-18186 Apache HugeGraph-Server: Command execution in gremlin KEVCVSS 3.1CRITICAL 9.8
  • TI-2023-25106 Deserialization of untrusted data in Apache ActiveMQ KEVCVSS 3.1CRITICAL 10.0
See all 4053 →

Sources

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