{"id":"CVE-2026-65654","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-65654","generatedAt":"2026-10-27T23:09:52.118Z","title":"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.","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.","published":"2026-09-21T12:17:16.000Z","lastModified":"2026-09-22T19:40:06.000Z","status":"Awaiting Analysis","sourceIdentifier":"security@temporal.io","cvss":{"version":"4.0","score":8.7,"severity":"HIGH","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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M"},"cwe":["CWE-770"],"affected":[],"epss":{"score":0.00577,"percentile":0.47265,"date":"2026-10-26","history":[{"date":"2026-09-22","score":0.00552,"percentile":0.44997}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.58%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"new","label":"New CVE","at":"2026-09-21T12:17:16.000Z","detail":{"score":"8.7","severity":"HIGH","publishedAt":"2026-09-21T12:17:16.133Z"},"summary":"New CVE, high severity (CVSS 8.7)."}],"references":[{"url":"https://github.com/temporalio/ringpop-go/blob/b97329e994f792f70427a7533a3e7a98976eb262/swim/labels.go#L11-L61","source":"security@temporal.io"},{"url":"https://github.com/temporalio/ringpop-go/blob/b97329e994f792f70427a7533a3e7a98976eb262/swim/memberlist.go#L521-L612","source":"security@temporal.io"},{"url":"https://github.com/temporalio/ringpop-go/commit/c317effcdc8bc09ed1c11f00994782bda9685d4b","source":"security@temporal.io"},{"url":"https://github.com/temporalio/ringpop-go/commit/d0de5fe1333074d5c41a88e9053592e39f495bb2","source":"security@temporal.io"},{"url":"https://github.com/temporalio/ringpop-go/pull/22","source":"security@temporal.io"},{"url":"https://github.com/temporalio/ringpop-go/tree/v0.1.0","source":"security@temporal.io"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-65654","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}