CVE-2026-65654: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-2cw5-f255-55f8
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CWE-770
Published
Advisory Summary

CVE-2026-65654 is a HIGH security vulnerability vulnerability (CWE-770: Allocation of Resources Without Limits or Throttling) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-65654 at a Glance

CVE Identifier CVE-2026-65654
GHSA Identifier GHSA-2cw5-f255-55f8
Severity HIGH
CVSS v3.1 Base Score N/A
CWE Classification CWE-770: Allocation of Resources Without Limits or Throttling
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

How to Fix CVE-2026-65654

To remediate this vulnerability, upgrade all affected Software dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

mvn dependency:tree

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2026-65654, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree

Analyze the terminal output to locate any version of Software in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: The mvn dependency:tree command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-770: Allocation of Resources Without Limits or Throttling, where the product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated. In Software, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

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.

References

NVD — CVE-2026-65654 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-65654
Software Source Repository REPOSITORY
https://github.com/temporalio/ringpop-go/pull/22
Security Fix Commit FIX COMMIT
https://github.com/temporalio/ringpop-go/commit/c317effcdc8bc09ed1c11f00994782bda9685d4b
Security Fix Commit FIX COMMIT
https://github.com/temporalio/ringpop-go/commit/d0de5fe1333074d5c41a88e9053592e39f495bb2
Software Source Repository REPOSITORY
https://github.com/temporalio/ringpop-go/blob/b97329e994f792f70427a7533a3e7a98976eb262/swim/labels.go#L11-L61
Software Source Repository REPOSITORY
https://github.com/temporalio/ringpop-go/blob/b97329e994f792f70427a7533a3e7a98976eb262/swim/memberlist.go#L521-L612
Software Source Repository REPOSITORY
https://github.com/temporalio/ringpop-go/tree/v0.1.0

Frequently Asked Questions

What is CVE-2026-65654?
CVE-2026-65654 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-770: Allocation of Resources Without Limits or Throttling.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-65654?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What CWE is associated with CVE-2026-65654?
CVE-2026-65654 is classified under CWE-770: Allocation of Resources Without Limits or Throttling (The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.).
How can I check Maven dependencies for CVE-2026-65654?
Run the dependency tree command: 'mvn dependency:tree'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-2cw5-f255-55f8",
  "modified" : "2026-09-21T12:32:38Z",
  "published" : "2026-09-21T12:32:38Z",
  "aliases" : [ "CVE-2026-65654" ],
  "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" : [ {
    "type" : "CVSS_V4",
    "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"
  } ],
  "affected" : [ ],
  "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"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-770" ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-09-21T12:17:16Z"
  }
}