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TI-2026-46799 Aliases CVE-2026-65652GHSA-2mhp-wpjp-pjr8

temporalio/tchannel-go malformed checksum type causes process termination

Priority MEDIUM 45CWE-129Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 1 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-129 and the CVSS impact.

Summary

github.com/temporalio/tchannel-go did not validate the one-byte checksum-type field in inbound TChannel call frames. A network peer that can reach a listener can complete the standard initialization handshake and send a call request with an unsupported checksum type. The parser uses that value as an index into a four-entry checksum pool, causing an unrecovered Go panic on the connection read goroutine and terminating the hosting process. This allows remote denial of service against applications that expose the listener to untrusted peers. The impact is limited to availability; no confidentiality or integrity impact was identified.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0071 53rd percentileScored 2026-11-07
Fix Partial temporalio/tchannel-go (Temporal Technologies, Inc.): 1.22.1-0.20260720194454-0cb017f6870aRed Hat: 1 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Temporal Technologies, Inc.temporalio/tchannel-go0.0.0-20160105034737-a6904155f628 to before 1.22.1-0.20260720194454-0cb017f6870a1.22.1-0.20260720194454-0cb017f6870aPatch availableCNA
  • temporalio/tchannel-go VendorTemporal Technologies, Inc. Affected 0.0.0-20160105034737-a6904155f628 to before 1.22.1-0.20260720194454-0cb017f6870a Fixed in 1.22.1-0.20260720194454-0cb017f6870a Patch available CNA

Remediation

  • Fix · CNA temporalio/tchannel-go (Temporal Technologies, Inc.) Fixed in 1.22.1-0.20260720194454-0cb017f6870a

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Temporal Technologies temporalio/tchannel-go 1.22.1-0.20260720194454-0cb017f6870a

    2 records Highest priority Priority MEDIUM 2 MEDIUM

    Other records, highest priority first

    • TI-2026-46800 temporalio/tchannel-go zero-chunk call fragment causes process terminationPriority MEDIUM 45
    Show all 2 records →

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Ansible Automation Orchestrator 2026AffectedNo fix yet

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-65652
  2. 2026-10-03 Alias added: GHSA-2mhp-wpjp-pjr8
  3. 2026-11-06 Affected versions changed · Red Hat
  4. 2026-11-06 CVSS score added · Red Hat

References

Patch 2

Other 4

  • TI-2026-63861 s2s-proxy accepts untrusted client certificates CVSS 4.0CRITICAL 9.3
  • TI-2026-46800 temporalio/tchannel-go zero-chunk call fragment causes process termination CVSS 4.0HIGH 8.7
  • TI-2026-46801 temporalio/ringpop-go fails to enforce configured label limits on inbound membership gossip CVSS 4.0HIGH 8.7
  • TI-2026-13897 temporalio/sqlparser malformed MySQL version comments can cause a panic CVSS 4.0HIGH 8.7
  • TI-2026-84119 Temporal Server k8s compute provider lets callers run host commands CVSS 4.0HIGH 8.7
  • TI-2026-60383 Temporal Server worker deployment compute provider executes a caller-supplied command on the Worker Service host CVSS 4.0HIGH 8.7
See all 17 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences