Vulnerability Description
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.
Related Weaknesses (CWE)
References
- https://github.com/temporalio/tchannel-go/blob/8706a1ab5f617efd79dace7ab2d1d80cc
- https://github.com/temporalio/tchannel-go/commit/0cb017f6870a8420695abeb9a4560d3
- https://github.com/temporalio/tchannel-go/commit/1dcfa67262ecd56a24f12940f408254
- https://github.com/temporalio/tchannel-go/commit/8d8ca17342b3620d3a6d5c1a8251455
- https://github.com/temporalio/tchannel-go/pull/14
- https://github.com/temporalio/tchannel-go/tree/v1.22.1
FAQ
What is CVE-2026-65653?
CVE-2026-65653 is a documented vulnerability. 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 un...
How severe is CVE-2026-65653?
CVSS scoring is not yet available for CVE-2026-65653. Check NVD for updates.
Is there a patch for CVE-2026-65653?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.