CVE-2026-65654
temporalio/ringpop-go fails to enforce configured label limits on inbound membership gossip
- Published
- Updated
- Reserved
- Assigned by
- Temporal
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| TemporalCNA (assigner) | 4.0 | High8.7 | 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 |
| NVDNVD · Awaiting Analysis | 4.0 | High8.7 | 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
- EPSS (exploitation in 30 days)
- 0.58% · top 52% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.7.
Weakness
Affected products
Temporal Technologies, Inc. · temporalio/ringpop-go
- affected 0.0.0-20160824133849-d0de5fe13330 – < 0.0.0-20260724173031-c317effcdc8b
What to do
Solution: Upgrade github.com/temporalio/ringpop-go to v0.1.0 or later. The fix validates peer-supplied label maps against the configured LabelOptions before labels are retained or disseminated. Invalid incoming labels are discarded while the remaining membership change can still be processed.
Workaround: 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.
References (6)
- First affected source revision (opens in a new tab)product
- Configured label limits and their resource-control purpose (opens in a new tab)product
- Vulnerable inbound membership-update path (opens in a new tab)product
- Inbound label-validation fix (opens in a new tab)patch
- First fixed default-branch revision (opens in a new tab)patch
- Fixed release tag v0.1.0 (opens in a new tab)product
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2026-65654)Record last updated .