# org.apache.qpid:protonj2 (Maven) vulnerabilities

5 known vulnerabilities (4 high, 1 medium), with the versions each affects and the releases that fix them.

## At a glance

- Latest release: 1.4.0 (Oct 10, 2026): no advisory affects it
- Newest unaffected release: 1.4.0 (Oct 10, 2026), the latest release
- Dependents: 22
- Releases: 28 since 1.0.0 (Aug 25, 2025)
- Registry: https://central.sonatype.com/artifact/org.apache.qpid/protonj2
- Releases read: Nov 8, 2026

## Version timeline

Affected versions per advisory, in version order:

- CVE-2026-67592: 1.0.0-M1 to 1.1.0 (1.2.0 is outside it)
- CVE-2026-67591: 1.0.0-M1 to 1.1.0 (1.2.0 is outside it)
- CVE-2026-67590: 1.0.0-M1 to 1.1.0 (1.2.0 is outside it)
- CVE-2026-67589: 1.0.0-M1 to 1.1.0 (1.2.0 is outside it)
- CVE-2026-67588: 1.0.0-M1 to 1.1.0 (1.2.0 is outside it)

## Advisories (5)

### [CVE-2026-67592](https://cve.now/CVE-2026-67592): Apache Qpid ProtonJ2: Unable to govern the maximum number of transfer frames per incoming delivery

- Severity: High 7.5
- Published: Aug 5, 2026
- Affected: through 1.1.0.
- Fixed in 1.2.0 (released Jul 31, 2026, 5 days before disclosure), the first release outside every affected range (no listed fixed version clears them all).
- The latest release, 1.4.0, is not affected.

### [CVE-2026-67591](https://cve.now/CVE-2026-67591): Apache Qpid ProtonJ2: Incoming session flow control window can be exceeded

- Severity: Medium 6.5
- Published: Aug 5, 2026
- Affected: through 1.1.0.
- Fixed in 1.2.0 (released Jul 31, 2026, 5 days before disclosure), the first release outside every affected range (no listed fixed version clears them all).
- The latest release, 1.4.0, is not affected.

### [CVE-2026-67590](https://cve.now/CVE-2026-67590): Apache Qpid ProtonJ2: Unbounded type nesting can lead to pre-authentication stackoverflow

- Severity: High 7.5
- Published: Aug 5, 2026
- Affected: through 1.1.0.
- Fixed in 1.2.0 (released Jul 31, 2026, 5 days before disclosure), the first release outside every affected range (no listed fixed version clears them all).
- The latest release, 1.4.0, is not affected.

### [CVE-2026-67589](https://cve.now/CVE-2026-67589): Apache Qpid ProtonJ2: Type size/count handling can lead to excessive allocation pre-authentication

- Severity: High 7.5
- Published: Aug 5, 2026
- Affected: through 1.1.0.
- Fixed in 1.2.0 (released Jul 31, 2026, 5 days before disclosure), the first release outside every affected range (no listed fixed version clears them all).
- The latest release, 1.4.0, is not affected.

### [CVE-2026-67588](https://cve.now/CVE-2026-67588): Apache Qpid ProtonJ2: Unbounded symbol value caching can lead to pre-authentication resource exhaustion

- Severity: High 7.5
- Published: Aug 5, 2026
- Affected: through 1.1.0.
- Fixed in 1.2.0 (released Jul 31, 2026, 5 days before disclosure), the first release outside every affected range (no listed fixed version clears them all).
- The latest release, 1.4.0, is not affected.

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