CVE-2026-65652Network attack vectorHinoki check available

Remote process termination via unchecked checksum index

Published Sep 21, 2026 · Updated Sep 21, 2026

Improper array-index validation in Temporal Technologies tchannel-go before 1.22.1 allows remote attackers to terminate hosting processes. The inbound call-frame parser accepts an unsupported one-byte checksum type and uses it to index a four-entry checksum pool, triggering an unrecovered Go panic. Exploitation requires network access to an exposed listener and completion of the normal initialization handshake; mutually authenticated transport blocks unauthenticated peers before parsing.

CVSS severity8.7
High
EPSS probability0.71%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
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Summary

What happened

Improper array-index validation in Temporal Technologies tchannel-go before 1.22.1 allows remote attackers to terminate hosting processes. The inbound call-frame parser accepts an unsupported one-byte checksum type and uses it to index a four-entry checksum pool, triggering an unrecovered Go panic. Exploitation requires network access to an exposed listener and completion of the normal initialization handshake; mutually authenticated transport blocks unauthenticated peers before parsing.

The record

CVE
CVE-2026-65652
Published
Sep 21, 2026
Updated
Sep 21, 2026
Vendor
Temporal Technologies
Product
tchannel-go
Classifications
CWE-129, T1499
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=0.0.0-20160105034737-a6904155f628 <1.22.1-0.20260720194454-0cb017f6870a

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Temporal Technologies · tchannel-goversion=0.0.0-20160105034737-a6904155f628 <1.22.1-0.20260720194454-0cb017f6870a

Published CVSS scores

8.7TemporalCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

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-129Improper Validation of Array Index
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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