CVE Catalog

CVE-2026-65654

HighCVSS 8.7
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.55%

45th percentile - higher than 45% of all known CVEs

Summary

github.com/temporalio/ringpop-go enforces configured LabelOptions limits when an application changes the local node's labels, but affected versions do not apply those limits to label maps received in SWIM membership changes. A network peer that can reach a live Ringpop TChannel listener can repeatedly submit changes for distinct member addresses containing label keys, values, or counts that exceed the receiver's configured limits. Accepted labels are retained in the member list and disseminated to peers, allowing memory and gossip-bandwidth consumption to exceed configured bounds and potentially making the hosting process unavailable.

Risk Assessment

An attacker can cause memory and bandwidth consumption to exceed configured bounds, potentially making the hosting process unavailable. The impact is limited to availability; no confidentiality or integrity impact was identified.

Recommendation

Upgrade github.com/temporalio/ringpop-go to a version containing the fix that validates peer-supplied label maps before they are retained or disseminated. Until upgraded, consider restricting network access to the TChannel listener.

Related vulnerabilities

Original NVD description (English source)

github.com/temporalio/ringpop-go enforces configured LabelOptions limits when an application changes the local node's labels, but affected versions do not apply those limits to label maps received in SWIM membership changes. A network peer that can reach a live Ringpop TChannel listener can repeatedly submit changes for distinct member addresses containing label keys, values, or counts that exceed the receiver's configured limits. Accepted labels are retained in the member list and disseminated to peers, allowing memory and gossip-bandwidth consumption to exceed configured bounds and potentially making the hosting process unavailable. The fix validates peer-supplied label maps before they are retained or disseminated. Availability only; no confidentiality or integrity impact was identified.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS