CVE-2026-16651

temporalio/sqlparser can panic when Parse, ParseStrictDDL, or ParseNext processes a MySQL version comment whose contents are empty or consist only of one to five decimal digits. ExtractMysqlComment does not check the -1 result returned by strings.IndexFunc before using it as a slice boundary. The resulting Go runtime panic propagates unless the caller recovers it on the parsing goroutine, so applications that parse attacker-controlled SQL can terminate. Temporal Server exposes the affected parser through ListWorkers. When that API is enabled, an authenticated caller with namespace read permission can submit a malformed query that terminates the receiving Matching process. Repeated requests can sustain a denial of service. The issue affects availability only; no confidentiality or integrity impact was identified.

• https://github.com/temporalio/sqlparser/commit/74181ffcbaaf0c52faa925f4cf27ed6c0c2be86f
• https://github.com/temporalio/sqlparser/pull/5
• https://github.com/temporalio/sqlparser/tree/v0.1.0
• https://github.com/temporalio/temporal/pull/11090
• https://github.com/temporalio/temporal/pull/11190
• https://github.com/temporalio/temporal/releases/tag/v1.30.7
• https://github.com/temporalio/temporal/releases/tag/v1.31.3