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No exploitation reportedFix available

CVE-2026-67588

No exploitation reported by the sources we read.

  • Published2026-08-05
  • Fixed in1.2.0
  • WeaknessCWE-770

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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.

Timeline

dates in UTC
  1. 2026-08-0506:16CVE publishedNVD

Versions per branch

NVD
Apache qpid protonj2
BranchAffectedFixed in
1.2< 1.2.01.2.0

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA1 product

As apache, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-08-05

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • qpid-protonUbuntu:26.10all versions · no fixed version listed
  • qpid-protonUbuntu:26.04:LTSall versions · no fixed version listed
  • qpid-protonUbuntu:24.04:LTSall versions · no fixed version listed
  • qpid-protonUbuntu:22.04:LTSall versions · no fixed version listed
  • qpid-protonUbuntu:20.04:LTSall versions · no fixed version listed
  • qpid-protonUbuntu:18.04:LTSall versions · no fixed version listed
  • qpid-protonUbuntu:16.04:LTSall versions · no fixed version listed

Vendor advisories

  • CVE-2026-67588 Red Hat Product Security1 product fixed

    org.apache.qpid/protonj2: Apache Qpid ProtonJ2: Denial of Service via unbounded symbol value caching

  • RHSA-2026:69459 Red Hat Product Security1 product fixed

    Red Hat Security Advisory: AMQ Clients 2026.Q3

Full record on NVD

Fix

  1. Update Apache qpid protonj2 to 1.2.0
  2. Vendor fix Red Hat Product Security RHSA-2026:69459 · 1 productBefore applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
2026-08-05
Last Modified
2026-10-24
NVD status
Analyzed
GitHub Advisory
GHSA-mxmv-xrrq-hrv5

Frequently asked questions

What is 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.

Is CVE-2026-67588 actively exploited?

Active exploitation of CVE-2026-67588 has not been confirmed. Its EPSS score was 0.8% on 2026-11-05, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-67588?

CVE-2026-67588 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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