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CVE-2026-65651— temporalio/sqlparser deeply nested unary expressions can cause a fatal stack overflow during AST traversal

Quick assessment

Affected

Temporal Technologies, Inc. temporalio/sqlparser

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

temporalio/sqlparser 库接受包含深层嵌套一元表达式的 SQL 输入，并且在不强制施加合理嵌套深度限制的情况下返回相应深度的抽象语法树（AST）。该库的 String 和 Walk 操作会递归遍历该语法树。如果某个应用程序解析由攻击者控制的 SQL，并随后对返回的语法树进行格式化或遍历操作，就可能触发 Go 语言运行时中致命的栈溢出（stack overflow），从而导致进程终止；标准的 Go panic 恢复机制无法捕获或包含这种栈溢出情况。 Temporal Server 在归档（archi

CVSS 6.0 · Medium EPSS 0.67% · P52 Updated Sep 23, 2026

Possible ATT&CK Techniques 2 AI

T1211 · Exploitation for Stealth T1499 · Endpoint Denial of Service

Affected Version Matrix 5

Vendor	Product	Version Range	Status
Temporal Technologies, Inc.	Temporal Server	`0.0.0< 0.10.0`	unknown
		`0.10.0≤ 1.29.7`	affected
		`1.30.0< 1.30.7`	affected
		`1.31.0< 1.31.3`	affected
Temporal Technologies, Inc.	temporalio/sqlparser	`0.0.0-20141206041240-1aae9baceee8< 0.0.0-20260721183058-0466b6b405ac`	affected

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Vulnerability Information

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Vulnerability Title

temporalio/sqlparser deeply nested unary expressions can cause a fatal stack overflow during AST traversal

Source: CVE Program / CVE List V5

Vulnerability Description

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'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.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Source: CVE Program / CVE List V5

Vulnerability Type

未经控制的递归

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
Temporal Technologies, Inc.	temporalio/sqlparser	0.0.0-20141206041240-1aae9baceee8 ~ 0.0.0-20260721183058-0466b6b405ac	-
Temporal Technologies, Inc.	Temporal Server	0.10.0 ~ 1.29.7	`cpe:2.3:a:temporal:temporal::::::::`

II. Public POCs for CVE-2026-65651

#	POC Description	Source Link	Shenlong Link

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III. Intelligence Information for CVE-2026-65651

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Patches & Fixes for CVE-2026-65651 (4)

Other References for CVE-2026-65651 (4)

https://www.cve.org/CVERecord?id=CVE-2026-65651

Same Patch Batch · Temporal Technologies, Inc. · 2026-09-21 · 8 CVEs total

CVE-2026-89139	8.7 HIGH	Temporal Server worker deployment compute provider executes a caller-supplied command on t
CVE-2026-65653	8.7 HIGH	temporalio/tchannel-go zero-chunk call fragment causes process termination
CVE-2026-65654	8.7 HIGH	temporalio/ringpop-go fails to enforce configured label limits on inbound membership gossi
CVE-2026-65652	8.7 HIGH	temporalio/tchannel-go malformed checksum type causes process termination
CVE-2026-87858	7.2 HIGH	Temporal Server completion callback source header can direct attacker-chosen requests to t
CVE-2026-16652	7.1 HIGH	Temporal Server Schedule exclusion search can cause excessive CPU consumption
CVE-2026-16651	7.1 HIGH	temporalio/sqlparser malformed MySQL version comments can cause a panic

IV. Related Vulnerabilities

Same product: temporalio/sqlparser

CVE-2026-16651
temporalio/sqlparser malformed MySQL version comments can ca

Same vendor: Temporal Technologies, Inc.

Same weakness: CWE-674