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.
History

Mon, 21 Sep 2026 19:45:00 +0000

Type Values Removed Values Added
First Time appeared Temporal
Temporal ringpop-go
Vendors & Products Temporal
Temporal ringpop-go

Mon, 21 Sep 2026 16:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 21 Sep 2026 11:45:00 +0000

Type Values Removed Values Added
Description 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.
Title temporalio/ringpop-go fails to enforce configured label limits on inbound membership gossip
Weaknesses CWE-770
References
Metrics cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: Temporal

Published: 2026-09-21T11:38:23.307Z

Updated: 2026-09-21T15:26:44.632Z

Reserved: 2026-07-22T18:08:48.925Z

Link: CVE-2026-65654

cve-icon Vulnrichment

Updated: 2026-09-21T15:26:39.064Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-09-21T12:17:16.133

Modified: 2026-09-22T19:40:05.870

Link: CVE-2026-65654

cve-icon Redhat

No data.