CVE-2026-65654

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. The fix validates peer-supplied label maps before they are retained or disseminated. Availability only; no confidentiality or integrity impact was identified.

Affected Software

VendorProductVersion RangeStatus
Temporal Technologies, Inc.temporalio/ringpop-go0.0.0-20160824133849-d0de5fe13330 < 0.0.0-20260724173031-c317effcdc8baffected

Weaknesses

  • CWE-770: CWE-770: Allocation of Resources Without Limits or Throttling

Workarounds

Restrict the Ringpop membership listener to trusted cluster members. Where supported by the embedding application, require mutual TLS with verified client certificates. These controls prevent untrusted clients from reaching the vulnerable receive path but do not correct the missing validation for an authenticated or compromised peer.

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: yes
    • Technical Impact: partial

References