CVE-2026-65654Network attack vectorHinoki check available

Service interruption via unbounded inbound membership labels

Published Sep 21, 2026 · Updated Sep 21, 2026

Resource exhaustion in Temporal Technologies ringpop-go before 0.0.0-20260724173031-c317effcdc8b allows remote attackers to interrupt hosting processes. The SWIM member-list update path accepts peer-supplied label maps without applying configured key-size, value-size, or count limits, then retains and re-gossips them. The attacker needs network access to a live Ringpop TChannel listener; repeated changes for distinct member addresses can exhaust memory and gossip bandwidth until the host process becomes unavailable.

CVSS severity8.7
High
EPSS probability0.58%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Resource exhaustion in Temporal Technologies ringpop-go before 0.0.0-20260724173031-c317effcdc8b allows remote attackers to interrupt hosting processes. The SWIM member-list update path accepts peer-supplied label maps without applying configured key-size, value-size, or count limits, then retains and re-gossips them. The attacker needs network access to a live Ringpop TChannel listener; repeated changes for distinct member addresses can exhaust memory and gossip bandwidth until the host process becomes unavailable.

The record

CVE
CVE-2026-65654
Published
Sep 21, 2026
Updated
Sep 21, 2026
Vendor
Temporal Technologies
Product
ringpop-go
Classifications
CWE-770, T1499.003
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 21, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 21, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0.0.0-20160824133849-d0de5fe13330 <0.0.0-20260724173031-c317effcdc8b

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Temporal Technologies · ringpop-goversion=0.0.0-20160824133849-d0de5fe13330 <0.0.0-20260724173031-c317effcdc8b

Published CVSS scores

8.7National Vulnerability DatabaseCVSS: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

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-770Allocation of Resources Without Limits or Throttling
T1499.003Application Exhaustion Flood

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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