Vulnerability Description
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.
Related Weaknesses (CWE)
References
- https://github.com/temporalio/tchannel-go/blob/8706a1ab5f617efd79dace7ab2d1d80cc
- https://github.com/temporalio/tchannel-go/blob/8706a1ab5f617efd79dace7ab2d1d80cc
- https://github.com/temporalio/tchannel-go/commit/0cb017f6870a8420695abeb9a4560d3
- https://github.com/temporalio/tchannel-go/commit/a6904155f628b9e602b7bc88ef48900
- https://github.com/temporalio/tchannel-go/pull/14
- https://github.com/temporalio/tchannel-go/tree/v1.22.1
FAQ
What is CVE-2026-65652?
CVE-2026-65652 is a documented vulnerability. 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 h...
How severe is CVE-2026-65652?
CVSS scoring is not yet available for CVE-2026-65652. Check NVD for updates.
Is there a patch for CVE-2026-65652?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.