Answer in brief
CVE-2026-65653 records a Unknown severity vulnerability in temporalio/tchannel-go zero-chunk call fragment 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 | >=0.0.0-20150531204735-8d8ca17342b3 <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 reject TChannel call fragments containing checksum metadata but no length-prefixed argument chunks. The fragment reader left its chunk slice empty and then unconditionally selected the first element. A network peer can supply such a malformed call fragment, including as a direct initial call request after completing the standard initialization handshake. On that inbound path, the resulting unrecovered Go slice-bounds panic occurs on a library-created dispatch goroutine and terminates 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.