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TI-2026-59440 Aliases CVE-2026-87022GHSA-xwrc-v28h-528j

Apache Tomcat: WebSocket message smuggling with per-message-deflate

Priority MEDIUM 40CWE-130Published · 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: 1 fixed, 8 without a fix

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

Summary

Improper handling of length parameter inconsistency vulnerability in Apache Tomcat allows WebSocket message smuggling when per-message-deflate is used. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.25, from 10.1.0-M1 through 10.1.59, from 9.0.0.M1 through 9.0.121. The following versions were EOS at the time the CVE was created but are known to be affected: from 8.5.0 through 8.5.100, from 7.0.56 through 7.0.109. Other unsupported versions may also be affected. Users are recommended to upgrade to version 11.0.26, 10.1.60 or 9.1.22, which fix the issue.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0054 45th percentileScored 2026-11-07
Fix Partial Red Hat: 2 advisoriesRed Hat: 1 fixed, 8 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-M1 – 11.0.25; 10.1.0-M1 – 10.1.59; 9.0.0.M1 – 9.0.121; 8.5.0 – 8.5.100; 7.0.56 – 7.0.109—No fix listedCNA
  • Apache Tomcat VendorApache Affected 11.0.0-M1 – 11.0.25; 10.1.0-M1 – 10.1.59; 9.0.0.M1 – 9.0.121; 8.5.0 – 8.5.100; 7.0.56 – 7.0.109 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

Red Hat 2 advisories

  • RHSA-2026:68258 Released 2026-09-16 · Red Hat rating Important
    Red Hat Hardened Images RPMs bug fix and enhancement update
    • Red Hat Hardened Images tomcat11-1:11.0.26-0.1.hum1@noarch@public-hummingbird-aarch64-rpms, tomcat11-1:11.0.26-0.1.hum1@noarch@public-hummingbird-x86_64-rpms, tomcat11-1:11.0.26-0.1.hum1@src +18
  • RHSA-2026:68257 Released 2026-09-16 · Red Hat rating Important
    Red Hat Hardened Images RPMs bug fix and enhancement update
    • Red Hat Hardened Images tomcat10-1:10.1.60-0.1.hum1@noarch@public-hummingbird-aarch64-rpms, tomcat10-1:10.1.60-0.1.hum1@noarch@public-hummingbird-x86_64-rpms, tomcat10-1:10.1.60-0.1.hum1@src +18

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 6AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 7AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 8AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 9AffectedNo fix yet: Fix deferred
Red Hat JBoss Web Server 5AffectedNo fix yet: Fix deferred
Red Hat JBoss Web Server 6AffectedNo fix yet
Red Hat JBoss Web Server 7AffectedNo fix yet
Red Hat Hardened ImagesFixed RHSA-2026:68257, RHSA-2026:68258
Not affected: 1 product
  • Red Hat Hardened Images

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-87022
  2. 2026-10-03 Alias added: GHSA-xwrc-v28h-528j
  3. 2026-10-08 Affected versions changed · Red Hat
  4. 2026-10-25 Priority changed: LOW → MEDIUM

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