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TI-2026-47737 Aliases CVE-2026-67553GHSA-rxxp-x2qg-g2f2

Apache Qpid Proton Dotnet: Incoming session flow control window can be exceeded

Priority LOW 30CWE-770Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-770.

Summary

An authenticated attacker could exceed the session flow control incoming window potentially leading to denial of service. This issue affects Apache Qpid Proton-Dotnet: through 1.0.0. Users are recommended to upgrade to version 1.1.0, which fixes the issue.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00653 51st percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
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 Proton Dotnetup to 1.0.0—No fix listedCNA
  • Apache Qpid Proton Dotnet VendorApache Affected up to 1.0.0 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:apache:qpid_proton-dotnet:*:*:*:*:*:*:*:*before 1.1.0VulnerableApache
  • cpe:2.3:a:apache:qpid_proton-dotnet:*:*:*:*:*:*:*:* Versions before 1.1.0 Vulnerable ·Apache

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-67553
  2. 2026-10-03 Alias added: GHSA-rxxp-x2qg-g2f2
  3. 2026-10-14 EPSS moved to the 50th–90th percentile

References

Advisory 2

  • TI-2026-47736 Apache Qpid Proton Dotnet: Unbounded type nesting can lead to pre-authentication stackoverflow CVSS 3.1HIGH 7.5
  • TI-2026-47735 Apache Qpid Proton Dotnet: Type size/count handling can lead to excessive allocation pre-authentication CVSS 3.1HIGH 7.5
  • TI-2026-47727 Apache Qpid Proton Dotnet: Unbounded symbol value caching can lead to pre-authentication resource exhaustion CVSS 3.1HIGH 7.5
  • TI-2026-47739 Apache Qpid Proton Dotnet: Unable to govern the maximum number of transfer frames per incoming delivery CVSS 3.1MEDIUM 6.5
  • TI-2026-47738 Apache Qpid Proton Dotnet: Unbounded disposition range handling can lead to denial of service CVSS 3.1MEDIUM 6.5

Sources

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