{"id":"CVE-2026-65653","summary":"temporalio/tchannel-go zero-chunk call fragment causes process termination","details":"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.","modified":"2026-09-24T03:30:27.236233149Z","published":"2026-09-21T11:36:47.095Z","database_specific":{"cna_assigner":"Temporal","cwe_ids":["CWE-129"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/65xxx/CVE-2026-65653.json","unresolved_ranges":[{"extracted_events":[{"introduced":"0.0.0-20150531204735-8d8ca17342b3"},{"fixed":"1.22.1-0.20260720194454-0cb017f6870a"}],"source":"AFFECTED_FIELD"}]},"references":[{"type":"WEB","url":"https://github.com/temporalio/tchannel-go/blob/8706a1ab5f617efd79dace7ab2d1d80cc1881df0/fragmenting_reader.go#L256-L308"},{"type":"WEB","url":"https://github.com/temporalio/tchannel-go/tree/v1.22.1"},{"type":"WEB","url":"https://pkg.go.dev"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/65xxx/CVE-2026-65653.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-65653"},{"type":"FIX","url":"https://github.com/temporalio/tchannel-go/commit/0cb017f6870a8420695abeb9a4560d39dadc4e2e"},{"type":"FIX","url":"https://github.com/temporalio/tchannel-go/commit/1dcfa67262ecd56a24f12940f4082549190cb5d1"},{"type":"FIX","url":"https://github.com/temporalio/tchannel-go/commit/8d8ca17342b3620d3a6d5c1a825145595e7588ff"},{"type":"FIX","url":"https://github.com/temporalio/tchannel-go/pull/14"},{"type":"PACKAGE","url":"https://github.com/temporalio/tchannel-go"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/temporalio/tchannel-go","events":[{"introduced":"0"},{"fixed":"0cb017f6870a8420695abeb9a4560d39dadc4e2e"},{"fixed":"1dcfa67262ecd56a24f12940f4082549190cb5d1"},{"fixed":"8d8ca17342b3620d3a6d5c1a825145595e7588ff"}],"database_specific":{"source":"REFERENCES"}}],"versions":["v1.22.0","v1.21.2","v1.21.1","v1.21.0","v1.20.1","v1.20.0","v1.19.1","v1.19.0","v1.18.0","v1.17.0","v1.16.0","v1.15.0","v1.14.0","v1.13.0","v1.12.0","v1.11.0","v1.10.0","v1.9.0","v1.8.1","v1.8.0","v1.7.0","v1.6.0","v1.5.0","v1.4.0","thrift-v1.0.0-dev","v1.3.0","v1.2.3","v1.2.2","v1.2.1","v1.2.0","v1.1.0","v1.0.9","v1.0.8","v1.0.6","v1.0.5","v1.0.4","v1.0.3","v1.0.1","v1.0.0","v0.01"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-65653.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"}]}