Vulnerability-Lookup

GHSA-2CW5-F255-55F8

Vulnerability from github – Published: 2026-09-21 12:32 – Updated: 2026-09-21 12:32

Details

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.

Severity

8.7 (High)


                  
                    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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-65654"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-770"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-21T12:17:16Z",
    "severity": "HIGH"
  },
  "details": "github.com/temporalio/ringpop-go enforces configured LabelOptions limits when an application changes the local node\u0027s 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\u0027s 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.",
  "id": "GHSA-2cw5-f255-55f8",
  "modified": "2026-09-21T12:32:38Z",
  "published": "2026-09-21T12:32:38Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-65654"
    },
    {
      "type": "WEB",
      "url": "https://github.com/temporalio/ringpop-go/pull/22"
    },
    {
      "type": "WEB",
      "url": "https://github.com/temporalio/ringpop-go/commit/c317effcdc8bc09ed1c11f00994782bda9685d4b"
    },
    {
      "type": "WEB",
      "url": "https://github.com/temporalio/ringpop-go/commit/d0de5fe1333074d5c41a88e9053592e39f495bb2"
    },
    {
      "type": "WEB",
      "url": "https://github.com/temporalio/ringpop-go/blob/b97329e994f792f70427a7533a3e7a98976eb262/swim/labels.go#L11-L61"
    },
    {
      "type": "WEB",
      "url": "https://github.com/temporalio/ringpop-go/blob/b97329e994f792f70427a7533a3e7a98976eb262/swim/memberlist.go#L521-L612"
    },
    {
      "type": "WEB",
      "url": "https://github.com/temporalio/ringpop-go/tree/v0.1.0"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "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",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2026-65654 (GCVE-0-2026-65654)

Vulnerability from cvelistv5 – Published: 2026-09-21 11:38 – Updated: 2026-09-21 15:26

Title

temporalio/ringpop-go fails to enforce configured label limits on inbound membership gossip

Summary

Severity

8.7 (High)


                        
                          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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-21 15:26 UTC

CWE

CWE-770 - Allocation of Resources Without Limits or Throttling

Assigner

Temporal mitre root Scorecard

References

6 references

URL	Tags
https://github.com/temporalio/ringpop-go/commit/d…	product
https://github.com/temporalio/ringpop-go/blob/b97…	product
https://github.com/temporalio/ringpop-go/blob/b97…	product
https://github.com/temporalio/ringpop-go/pull/22	patch
https://github.com/temporalio/ringpop-go/commit/c…	patch
https://github.com/temporalio/ringpop-go/tree/v0.1.0	product

Impacted products

1 product

Vendor	Product	Version
Temporal Technologies, Inc.	temporalio/ringpop-go	Affected: 0.0.0-20160824133849-d0de5fe13330 , < 0.0.0-20260724173031-c317effcdc8b (semver)

Credits

An external security researcher who reported this issue responsibly to Temporal Technologies

Show details on NVD website

JSON

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{
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                "id": "CVE-2026-65654",
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                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-21T15:26:15.984122Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
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        ],
        "providerMetadata": {
          "dateUpdated": "2026-09-21T15:26:44.632Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
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          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
          "modules": [
            "Labels",
            "SWIM membership"
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          "packageName": "github.com/temporalio/ringpop-go",
          "product": "temporalio/ringpop-go",
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            "swim/labels.go",
            "swim/member.go",
            "swim/memberlist.go"
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          "repo": "https://github.com/temporalio/ringpop-go",
          "vendor": "Temporal Technologies, Inc.",
          "versions": [
            {
              "lessThan": "0.0.0-20260724173031-c317effcdc8b",
              "status": "affected",
              "version": "0.0.0-20160824133849-d0de5fe13330",
              "versionType": "semver"
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      "configurations": [
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              "value": "\u003cp\u003eThe CVSS Base score reflects an application that exposes a Ringpop membership listener to untrusted network peers without authenticated transport. Ringpop does not authenticate peers at the application layer. An embedding application can restrict the listener to trusted cluster members or require verified client certificates before TChannel receives a request. Deployments using those controls should apply appropriate Environmental metrics.\u003c/p\u003e"
            }
          ],
          "value": "The CVSS Base score reflects an application that exposes a Ringpop membership listener to untrusted network peers without authenticated transport. Ringpop does not authenticate peers at the application layer. An embedding application can restrict the listener to trusted cluster members or require verified client certificates before TChannel receives a request. Deployments using those controls should apply appropriate Environmental metrics."
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            "Recovery": "NOT_DEFINED",
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        "dateUpdated": "2026-09-21T11:38:23.307Z",
        "orgId": "61241ed8-fa44-4f23-92db-b8c443751968",
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        {
          "name": "Configured label limits and their resource-control purpose",
          "tags": [
            "product"
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        },
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          "name": "Vulnerable inbound membership-update path",
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Sightings

Author	Source	Type	Date	Other

Nomenclature

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Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
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Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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GHSA-2CW5-F255-55F8

CVE-2026-65654 (GCVE-0-2026-65654)

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