CVE-2026-67588
Apache Qpid ProtonJ2: Unbounded symbol value caching can lead to pre-authentication resource exhaustion
A pre-authentication attacker could leverage unbounded symbol value caching to cause resource exhaustion leading to 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: Unbounded symbol value caching can lead to pre-authentication resource exhaustion
A pre-authentication attacker could leverage unbounded symbol value caching to cause resource exhaustion leading to 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-2026-67588- 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-770
- Updated
- 2026-11-02
EUVDEUVD-2026-53054
A pre-authentication attacker could leverage unbounded symbol value caching to cause resource exhaustion leading to 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-2026-53054- 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-mxmv-xrrq-hrv5
A pre-authentication attacker could leverage unbounded symbol value caching to cause resource...
A pre-authentication attacker could leverage unbounded symbol value caching to cause resource exhaustion leading to 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-mxmv-xrrq-hrv5- 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-770
- Updated
- 2026-11-02
NVD
A pre-authentication attacker could leverage unbounded symbol value caching to cause resource exhaustion leading to 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-2026-67588- 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-770
- Updated
- 2026-11-02
OSV
Apache Qpid ProtonJ2: Unbounded symbol value caching can lead to pre-authentication resource exhaustion
A pre-authentication attacker could leverage unbounded symbol value caching to cause resource exhaustion leading to 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-2026-67588- 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-770
- Updated
- 2026-11-02
OSVUBUNTU-CVE-2026-67588
A pre-authentication attacker could leverage unbounded symbol value caching to cause resource exhaustion leading to 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-2026-67588- 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-2026-67588 No score
A pre-authentication attacker could leverage unbounded symbol value caching to cause resource exhaustion leading to 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-2026-67588- 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-2026-67588 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/vk4j02dzggfdrdkwvzmqo4jro2tgj0jt
openwall.com/lists/oss-security/2026/08/04/27
nvd.nist.gov/vuln/detail/CVE-2026-67588
github.com/advisories/GHSA-mxmv-xrrq-hrv5
repo.maven.apache.org/maven2
security-tracker.debian.org/tracker/CVE-2026-67588
ubuntu.com/security/CVE-2026-67588
cve.org/CVERecord?id=CVE-2026-67588