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TI-2026-76845 Aliases CVE-2026-103119GHSA-64hx-4gc9-f6v4

Buffer under-read in Apache Tomcat can mix response bodies

Priority MEDIUM 46CWE-127Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · None · High
Fix status
Fixed

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

Summary

Apache Tomcat from 11.0.0-M25 through 11.0.26 is affected. A buffer under-read (CWE-127) during a large non-blocking write can split one response body between the current request and the next request on the same connection. A remote attacker with no privileges or user interaction can cause the second request to fail and may read data from the first response.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

Buffer under-read vulnerability in Apache Tomcat meant that a large non-blocking write could result in the response body being split between the current request and the next request received on that connection leading most likely to failure of the second request and possibly leakage of data from the first response to the second. This issue affects Apache Tomcat: from 11.0.0-M25 through 11.0.26. Users are recommended to upgrade to version 11.0.27, which fixes the issue.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00586 48th percentileScored 2026-11-07
Fix Fixed Red Hat: 2 advisories

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-M25 – 11.0.26—No fix listedCNA
  • Apache Tomcat VendorApache Affected 11.0.0-M25 – 11.0.26 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 version 11.0.27, which fixes the issue. Red Hat lists fixes for Red Hat Hardened Images in RHSA-2026:85926 and RHSA-2026:81365.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

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

ProductStatusPlan or fix
Red Hat Hardened ImagesFixed RHSA-2026:81365, RHSA-2026:85926

Timeline

  1. 2026-10-20 Threatist record created from CVE-2026-103119
  2. 2026-10-20 Alias added: GHSA-64hx-4gc9-f6v4
  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. 2026-10-21 CVSS score added · 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