# org.apache.qpid:proton-j (Maven) vulnerabilities

8 known vulnerabilities (3 high, 3 medium), with the versions each affects and the releases that fix them.

## At a glance

- Latest release: 0.35.0 (Jul 31, 2026): no advisory affects it
- Newest unaffected release: 0.35.0 (Jul 31, 2026), the latest release
- Dependents: 100
- Releases: 52 since 0.4 (Feb 21, 2013)
- Registry: https://central.sonatype.com/artifact/org.apache.qpid/proton-j
- Releases read: Nov 8, 2026

## Version timeline

Affected versions per advisory, in version order:

- CVE-2026-66277: 0.4 to 0.34.1 (0.35.0 is outside it)
- CVE-2026-66276: 0.4 to 0.34.1 (0.35.0 is outside it)
- CVE-2026-66275: 0.4 to 0.34.1 (0.35.0 is outside it)
- CVE-2026-66274: 0.4 to 0.34.1 (0.35.0 is outside it)
- CVE-2026-66273: 0.4 to 0.34.1 (0.35.0 is outside it)
- CVE-2026-66257: 0.4 to 0.34.1 (0.35.0 is outside it)
- CVE-2018-17187: 0.4 to 0.29.0 (0.30.0 is outside it)
- CVE-2016-2166: 0.4 to 0.12.0 (0.12.1 is outside it)

## Advisories (8)

### [CVE-2026-66277](https://cve.now/CVE-2026-66277): Apache Qpid Proton-J: Unable to govern the maximum number of transfer frames per incoming delivery

- Severity: Medium 6.5
- Published: Aug 5, 2026
- Affected: through 0.34.1.
- Fixed in 0.35.0 (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, 0.35.0, is not affected.

### [CVE-2026-66276](https://cve.now/CVE-2026-66276): Apache Qpid Proton-J: Unbounded disposition range handling can lead to denial of service

- Severity: Medium 6.5
- Published: Aug 5, 2026
- Affected: through 0.34.1.
- Fixed in 0.35.0 (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, 0.35.0, is not affected.

### [CVE-2026-66275](https://cve.now/CVE-2026-66275): Apache Qpid Proton-J: Incoming session flow control window can be exceeded

- Severity: Medium 6.5
- Published: Aug 5, 2026
- Affected: through 0.34.1.
- Fixed in 0.35.0 (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, 0.35.0, is not affected.

### [CVE-2026-66274](https://cve.now/CVE-2026-66274): Apache Qpid Proton-J: Unbounded type nesting can lead to pre-authentication stackoverflow

- Severity: High 7.5
- Published: Aug 5, 2026
- Affected: through 0.34.1; fixed in 0.35.0.
- Fixed in 0.35.0 (released Jul 31, 2026, 5 days before disclosure).
- The latest release, 0.35.0, is not affected.

### [CVE-2026-66273](https://cve.now/CVE-2026-66273): Apache Qpid Proton-J: Type size/count handling can lead to excessive allocation pre-authentication

- Severity: High 7.5
- Published: Aug 5, 2026
- Affected: through 0.34.1.
- Fixed in 0.35.0 (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, 0.35.0, is not affected.

### [CVE-2026-66257](https://cve.now/CVE-2026-66257): Apache Qpid Proton-J: Unbounded symbol value caching can lead to pre-authentication resource exhaustion

- Severity: High 7.5
- Published: Aug 5, 2026
- Affected: through 0.34.1.
- Fixed in 0.35.0 (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, 0.35.0, is not affected.

### [CVE-2018-17187](https://cve.now/CVE-2018-17187): The Apache Qpid Proton-J transport includes an optional wrapper layer to perform TLS, enabled by use of the 'transport.ssl(...)' methods.

- Severity: Unrated
- Published: Nov 13, 2018
- Affected: from 0.3, fixed in 0.30.0.
- Fixed in 0.30.0 (released Nov 6, 2018, 7 days before disclosure).
- The latest release, 0.35.0, is not affected.

### [CVE-2016-2166](https://cve.now/CVE-2016-2166): The (1) proton.reactor.Connector, (2) proton.reactor.Container, and (3) proton.utils.BlockingConnection classes in Apache Qpid Proton…

- Severity: Unrated
- Published: Apr 12, 2016
- Affected: fixed in 0.12.1.
- Fixed in 0.12.1 (released Mar 17, 2016, 26 days before disclosure).
- The latest release, 0.35.0, is not affected.

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