TI-2026-47092 Aliases CVE-2026-66275 GHSA-vx3v-mcrw-7985

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

LOW 30CWE-770Published 2026-08-05 · Updated 2026-08-06

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: Deferred Red Hat: fix deferred

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat. 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-J: through 0.34.1. Users are recommended to upgrade to version 0.35.0, 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 Deferred Red Hat: fix deferred

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

Vendor	Product	Affected versions	Fixed in	Status	Source
Apache	Apache Qpid Proton-J	up to 0.34.1	—	No fix listed	CNA

Apache Qpid Proton-J VendorApache Affected up to 0.34.1 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:apache:qpid_proton-j::::::::	before 0.35.0	Vulnerable	Apache

cpe:2.3:a:apache:qpid_proton-j:*:*:*:*:*:*:*:* Versions before 0.35.0 Vulnerable ·Apache

Remediation

No fixed version listed by the sources yet.

Vendor assessments

Red Hat

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

Product	Status	Plan or fix
Red Hat AMQ Broker 7	Affected	No fix yet: Fix deferred
Red Hat Fuse 7	Affected	No fix yet: Fix deferred
Red Hat JBoss Enterprise Application Platform 8	Affected	No fix yet: Fix deferred
Red Hat JBoss Enterprise Application Platform Expansion Pack	Affected	No fix yet: Fix deferred
Red Hat build of Apache Camel 4 for Quarkus 3	Affected	No fix yet: Fix deferred
Red Hat build of Apache Camel for Spring Boot 4	Affected	No fix yet: Fix deferred
Red Hat build of Quarkus	Affected	No fix yet: Fix deferred

Timeline

2026-10-02 Threatist record created from CVE-2026-66275
2026-10-03 Alias added: GHSA-vx3v-mcrw-7985
2026-10-14 EPSS moved to the 50th–90th percentile

References

Advisory 2

TI-2026-47091 Apache Qpid Proton-J: Unbounded type nesting can lead to pre-authentication stackoverflow CVSS 3.1HIGH 7.5
TI-2026-47090 Apache Qpid Proton-J: Type size/count handling can lead to excessive allocation pre-authentication CVSS 3.1HIGH 7.5
TI-2026-47085 Apache Qpid Proton-J: Unbounded symbol value caching can lead to pre-authentication resource exhaustion CVSS 3.1HIGH 7.5
TI-2018-12286 Improper certificate validation in Apache Qpid Proton-J CVSS 3.0HIGH 7.4
TI-2026-47094 Apache Qpid Proton-J: Unable to govern the maximum number of transfer frames per incoming delivery CVSS 3.1MEDIUM 6.5
TI-2026-47093 Apache Qpid Proton-J: 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