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TI-2026-47750 Aliases CVE-2026-67589GHSA-w6q2-5crf-rf8x

Apache Qpid ProtonJ2: Type size/count handling can lead to excessive allocation pre-authentication

Priority MEDIUM 40CWE-789Published · 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
Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat. Impact type from CWE-789.

Summary

A pre-authentication attacker could leverage type size/count handling to cause excessive allocation leading to potential denial of service. This issue affects Apache Qpid ProtonJ2: through 1.1.0. Users are recommended to upgrade to version 1.2.0, which fixes the issue.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00774 55th percentileScored 2026-11-07
Fix Fixed Red Hat: 1 advisory

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 Qpid ProtonJ2up to 1.1.0—No fix listedCNA
  • Apache Qpid ProtonJ2 VendorApache Affected up to 1.1.0 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:apache:qpid_protonj2:*:*:*:*:*:*:*:*before 1.2.0VulnerableApache
  • cpe:2.3:a:apache:qpid_protonj2:*:*:*:*:*:*:*:* Versions before 1.2.0 Vulnerable ·Apache

Remediation

Red Hat 1 advisory

  • RHSA-2026:69459 Released 2026-09-21 · Red Hat rating Important
    AMQ Clients 2026.Q3
    • AMQ Clients 2026.Q3

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
AMQ Clients 2026.Q3Fixed RHSA-2026:69459

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-67589
  2. 2026-10-03 Alias added: GHSA-w6q2-5crf-rf8x

References

Advisory 2

  • TI-2026-47753 Apache Qpid ProtonJ2: Unable to govern the maximum number of transfer frames per incoming delivery CVSS 3.1HIGH 7.5
  • TI-2026-47751 Apache Qpid ProtonJ2: Unbounded type nesting can lead to pre-authentication stackoverflow CVSS 3.1HIGH 7.5
  • TI-2026-47749 Apache Qpid ProtonJ2: Unbounded symbol value caching can lead to pre-authentication resource exhaustion CVSS 3.1HIGH 7.5
  • TI-2026-47752 Apache Qpid ProtonJ2: Incoming session flow control window can be exceeded CVSS 3.1MEDIUM 6.5

Sources

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