Temporal ringpop-go Label Maps resource consumption

Summaryinfo

A vulnerability labeled as problematic has been found in Temporal ringpop-go. The impacted element is an unknown function of the component Label Maps. The manipulation results in resource consumption. This vulnerability is identified as CVE-2026-65654. The attack can be executed remotely. There is not any exploit available. Applying a patch is advised to resolve this issue.

Detailsinfo

A vulnerability classified as problematic has been found in Temporal ringpop-go (the affected version unknown). Affected is an unknown part of the component Label Maps. The manipulation with an unknown input leads to a resource consumption vulnerability. CWE is classifying the issue as CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. This is going to have an impact on availability. CVE summarizes:

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.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-65654 since 07/22/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1499.

Applying the patch d0de5fe1333074d5c41a88e9053592e39f495bb2 is able to eliminate this problem.

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Productinfo

Vendor

• Temporal

Name

• ringpop-go

CPE 2.3info

• 🔒

CPE 2.2info

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