CVE-2026-67589
Apache Qpid ProtonJ2: Type size/count handling can lead to excessive allocation pre-authentication
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Apache Qpid ProtonJ2: Type size/count handling can lead to excessive allocation pre-authentication
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.
- Record
CVE-2026-67589- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-789
- Updated
- 2026-11-02
EUVDEUVD-2026-53035
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.
- Record
EUVD-2026-53035- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-w6q2-5crf-rf8x
A pre-authentication attacker could leverage type size/count handling to cause excessive...
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.
- Record
GHSA-w6q2-5crf-rf8x- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-789
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2026-67589- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-789
- Updated
- 2026-11-02
OSV
Apache Qpid ProtonJ2: Type size/count handling can lead to excessive allocation pre-authentication
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.
- Record
CVE-2026-67589- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-789
- Updated
- 2026-11-02
OSVUBUNTU-CVE-2026-67589
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.
- Record
UBUNTU-CVE-2026-67589- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVDEBIAN-CVE-2026-67589 No score
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.
- Record
DEBIAN-CVE-2026-67589- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
qpid-protonUbuntu:16.04:LTS |
All versions, plus listed versions 0.7-20.10-2 |
None known |
qpid-protonUbuntu:18.04:LTS |
All versions, plus listed versions 0.14.0-5.10.14.0-5.1ubuntu1 |
None known |
qpid-protonUbuntu:20.04:LTS |
All versions, plus listed versions 0.22.0-3.20.22.0-3.2build10.22.0-3.30.22.0-3.3build1 |
None known |
qpid-protonUbuntu:22.04:LTS |
All versions, plus listed versions 0.22.0-5.10.22.0-5.1build10.22.0-5.1ubuntu10.22.0-5.1ubuntu2 |
None known |
qpid-protonUbuntu:24.04:LTS |
All versions, plus listed versions 0.37.0-2build10.37.0-2build20.37.0-2build40.37.0-2build5 |
None known |
qpid-protonUbuntu:26.10 |
All versions, plus listed versions 0.37.0-7build10.37.0-80.37.0-90.37.0-9build1 |
None known |
qpid-protonUbuntu:26.04:LTS |
All versions, plus listed versions 0.37.0-60.37.0-6build10.37.0-70.37.0-7build1 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected | ||
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-67589 is a high vulnerability (CVSS 7.5) in Apache Qpid Protonj2, published August 5, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.77%, the 55th percentile. No source names a fixed version.
References
lists.apache.org/thread/bs24x4778dh72xtfs299cy8krvdlo47q
openwall.com/lists/oss-security/2026/08/04/28
nvd.nist.gov/vuln/detail/CVE-2026-67589
github.com/advisories/GHSA-w6q2-5crf-rf8x
repo.maven.apache.org/maven2
security-tracker.debian.org/tracker/CVE-2026-67589
ubuntu.com/security/CVE-2026-67589
cve.org/CVERecord?id=CVE-2026-67589