Answer in brief
CVE-2026-65652 records a Unknown severity vulnerability in temporalio/tchannel-go malformed checksum type causes process termination. The current sources do not mark it as known exploited. The current feed maps Temporal Technologies, Inc./temporalio/tchannel-go (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Temporal Technologies, Inc./temporalio/tchannel-go (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Temporal Technologies, Inc./temporalio/tchannel-gogeneric | >=0.0.0-20160105034737-a6904155f628 <1.22.1-0.20260720194454-0cb017f6870a | 1.22.1-0.20260720194454-0cb017f6870a |
Published upstream
Sep 21, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 21, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 21, 2026
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.
Quoted source text, attributed separately from HOL analysis.