Read the docs
TI-2026-55175 Aliases CVE-2026-79677GHSA-r5gx-4gq8-822g

Apache Tomcat: WebSocket DoS due to lost asynchronous write timeout

Priority LOW 39CWE-1025Published · 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: 5 fixed, 7 without a fix

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat. Impact type from CWE-772.

Summary

Missing release of resource after effective lifetime, Comparison using wrong factors vulnerability in Apache Tomcat allows a denial of service as a result of lost time outs for asynchronous WebSocket writes. 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 EOL at the time the CVE was created but are known to be affected: from 8.5.0 through 8.5.100, from 7.0.43 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 9.0.122, which fix the issue.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00422 36th percentileScored 2026-11-07
Fix Partial Red Hat: 4 advisoriesRed Hat: 5 fixed, 7 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; 7.0.43 – 7.0.109—Patch availableCNA
  • 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; 7.0.43 – 7.0.109 Fixed in — Patch available 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 4 advisories

  • RHSA-2026:93618 Released 2026-11-03 · Red Hat rating Important
    Red Hat JBoss Web Server 7.0.3 release and security update
    • Red Hat JBoss Web Server 7.0 on RHEL 10 jws7-mod_cluster-2.1.1-1.Final_redhat_00001.1.el10jws, jws7-mod_cluster-tomcat-2.1.1-1.Final_redhat_00001.1.el10jws, jws7-tomcat-11.0.21-10.redhat_00010.1.el10jws +10
    • Red Hat JBoss Web Server 7.0 on RHEL 8 jws7-mod_cluster-2.1.1-1.Final_redhat_00001.1.el8jws, jws7-mod_cluster-tomcat-2.1.1-1.Final_redhat_00001.1.el8jws, jws7-tomcat-11.0.21-10.redhat_00010.1.el8jws +10
    • Red Hat JBoss Web Server 7.0 on RHEL 9 jws7-mod_cluster-2.1.1-1.Final_redhat_00001.1.el9jws, jws7-mod_cluster-tomcat-2.1.1-1.Final_redhat_00001.1.el9jws, jws7-tomcat-11.0.21-10.redhat_00010.1.el9jws +10
  • RHSA-2026:93622 Released 2026-11-03 · Red Hat rating Important
    Red Hat JBoss Web Server 7.0.3 release and security update
    • Red Hat JBoss Web Server 7.0.3
  • 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
Show 1 more Red Hat advisories
  • 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

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Apache Tomcat 7.0.43

    2 records Highest priority Priority MEDIUM 1 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2026-53292 Apache Tomcat: Bypass of security constraints for WebSocket endpointsPriority MEDIUM 50
    Show all 2 records →

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux 10AffectedNo fix yet
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
Red Hat Enterprise Linux 9AffectedNo fix yet
Red Hat JBoss Web Server 5AffectedNo fix planned: Will not fix
Red Hat JBoss Web Server 6AffectedNo fix yet
Red Hat Hardened ImagesFixed RHSA-2026:68257, RHSA-2026:68258
Red Hat JBoss Web Server 7.0 on RHEL 10Fixed RHSA-2026:93618
Red Hat JBoss Web Server 7.0 on RHEL 8Fixed RHSA-2026:93618
Red Hat JBoss Web Server 7.0 on RHEL 9Fixed RHSA-2026:93618
Red Hat JBoss Web Server 7.0.3Fixed RHSA-2026:93622
Not affected: 1 product
  • Red Hat Hardened Images

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-79677
  2. 2026-10-03 Alias added: GHSA-r5gx-4gq8-822g
  3. 2026-11-03 Fix available: RHSA-2026:93622 · Red Hat
  4. 2026-11-03 Fix available: RHSA-2026:93618 · Red Hat
  5. 2026-11-03 Fix available: Red Hat JBoss Web Server 7.0 on RHEL 10, Red Hat JBoss Web Server 7.0 on RHEL 8, Red Hat JBoss Web Server 7.0 on RHEL 9 +1 · Red Hat

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