CVE-2026-65654

HIGHPre-NVD 8.78.7
EchelonGraph scoreLOW confidence

This high-severity CVE scores 8.7 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit-prediction score not yet available (the EPSS model rescores nightly; freshly-published CVEs typically appear within 48 hours). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: secondary
Trending — 3 sources updated this week
8.7EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: —CVSS: 8.7Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
8.7
EG Score
8.7(low)
EG Risk
54(Track)
EG Risk 54/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity87% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
—
EPSS %ILE
—
KEV
Not listed

Published

September 21, 2026

Last Modified

September 21, 2026

Advisory Details (6)

Auto-updated Sep 21, 2026
Upstream fix merged — awaiting tagged release. Sources: github_commit, github_pr.
generic

GitHub - temporalio/ringpop-go at v0.1.0 · GitHub

https://github.com/temporalio/ringpop-go/tree/v0.1.0
github_commit

commit c317effcdc8b (temporalio/ringpop-go)

Fix landed in temporalio/ringpop-go commit c317effcdc8b — awaiting tagged release

https://github.com/temporalio/ringpop-go/commit/c317effcdc8bc09ed1c11f00994782bda9685d4b
github_pr

Bound membership resource usage and fix state-transition timer leak

Fix merged in temporalio/ringpop-go PR #22 on 2026-07-24 — awaiting tagged release

https://github.com/temporalio/ringpop-go/pull/22
generic

ringpop-go/swim/memberlist.go at b97329e994f792f70427a7533a3e7a98976eb262 · temporalio/ringpop-go · GitHub

https://github.com/temporalio/ringpop-go/blob/b97329e994f792f70427a7533a3e7a98976eb262/swim/memberlist.go#L521-L612
generic

ringpop-go/swim/labels.go at b97329e994f792f70427a7533a3e7a98976eb262 · temporalio/ringpop-go · GitHub

https://github.com/temporalio/ringpop-go/blob/b97329e994f792f70427a7533a3e7a98976eb262/swim/labels.go#L11-L61
github_commit

commit d0de5fe13330 (temporalio/ringpop-go)

Fix landed in temporalio/ringpop-go commit d0de5fe13330 — awaiting tagged release

https://github.com/temporalio/ringpop-go/commit/d0de5fe1333074d5c41a88e9053592e39f495bb2

Vendor Advisories for CVE-2026-65654(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 7× in last 7d / 7× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-09-21 16:24 UTCEG score recompute
  2. 2026-09-21 16:24 UTCGHSA enrichment
  3. 2026-09-21 15:35 UTCEG score recompute
  4. 2026-09-21 15:35 UTCGHSA enrichment
  5. 2026-09-21 12:30 UTCEG score recompute
  6. 2026-09-21 11:45 UTCEG score recompute
  7. 2026-09-21 11:45 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(4)

What is CVE-2026-65654?
CVE-2026-65654 is a high vulnerability published on September 21, 2026. 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…
When was CVE-2026-65654 disclosed?
CVE-2026-65654 was first published in the National Vulnerability Database on September 21, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
What is the CVSS score of CVE-2026-65654?
CVE-2026-65654 has a CVSS v3 base score of 8.7 (NVD). The EG score is currently aggregating — additional source signals are being incorporated as they become available..
How do I remediate CVE-2026-65654?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-65654, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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