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    <lastBuildDate>Thu, 01 Oct 2026 12:35:28 +0000</lastBuildDate>
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      <title>CVE-2026-65651 — temporalio/sqlparser deeply nested unary expressions can cause a fatal stack overflow during AST traversal</title>
      <link>https://db.gcve.eu/vuln/cve-2026-65651</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Temporal Technologies, Inc. temporalio/sqlparser, Temporal Technologies, Inc. Temporal Server&lt;/p&gt;
&lt;p&gt;temporalio/sqlparser accepts SQL containing deeply nested unary expressions and can return a correspondingly deep abstract syntax tree without enforcing an applicable nesting limit. The library&amp;#39;s String and Walk operations recursively traverse that tree. An application that parses attacker-controlled SQL and later formats or walks the returned tree can encounter a runtime-fatal Go stack overflow that terminates the process; Go panic recovery cannot contain this condition. Temporal Server passes caller-controlled query input through the affected parser in archival, visibility, and worker-query paths. In affected validation paths, the Server recursively formats an invalid expression while constructing an error. In a supported authenticated deployment, a caller with namespace read permission can terminate the receiving Frontend or Matching process. The dynamically confirmed ListWorkers route additionally requires at least one retained worker heartbeat. Repeated requests can sustain a denial of service. The issue affects availability only; no confidentiality or integrity impact was identified.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Temporal Technologies, Inc. temporalio/sqlparser, Temporal Technologies, Inc. Temporal Server&lt;/p&gt;
&lt;p&gt;temporalio/sqlparser accepts SQL containing deeply nested unary expressions and can return a correspondingly deep abstract syntax tree without enforcing an applicable nesting limit. The library&amp;#39;s String and Walk operations recursively traverse that tree. An application that parses attacker-controlled SQL and later formats or walks the returned tree can encounter a runtime-fatal Go stack overflow that terminates the process; Go panic recovery cannot contain this condition. Temporal Server passes caller-controlled query input through the affected parser in archival, visibility, and worker-query paths. In affected validation paths, the Server recursively formats an invalid expression while constructing an error. In a supported authenticated deployment, a caller with namespace read permission can terminate the receiving Frontend or Matching process. The dynamically confirmed ListWorkers route additionally requires at least one retained worker heartbeat. Repeated requests can sustain a denial of service. The issue affects availability only; no confidentiality or integrity impact was identified.&lt;/p&gt;</content:encoded>
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