---
id: CVE-2026-65651
title: >-
  temporalio/sqlparser accepts SQL containing deeply nested unary expressions
  and can return a correspondingly deep abstract syntax tree without enforcing
  an applicable nesting limit
summary: >-
  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 tr…
severity: high
cvss: 8.7
cvssVector: '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'
cwe:
  - CWE-674
vendor: 'Temporal Technologies, Inc.'
product: github.com/temporalio/sqlparser
affected:
  - >-
    github.com/temporalio/sqlparser >= 0.0.0-20141206041240-1aae9baceee8 <
    0.0.0-20260721183058-0466b6b405ac
  - go.temporal.io/server >= 0.10.0 <= 1.29.7
  - go.temporal.io/server >= 1.30.0 < 1.30.7
  - go.temporal.io/server >= 1.31.0 < 1.31.3
published: '2026-09-21'
updated: '2026-09-22'
sourceUpdated: '2026-09-22T19:40:05.870'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-65651'
references:
  - url: >-
      https://github.com/temporalio/sqlparser/commit/0466b6b405accfaa781e4bef417933efc18bcaef
    label: security@temporal.io
  - url: >-
      https://github.com/temporalio/sqlparser/commit/1aae9baceee8e48525da8f56b07bf6a5ca7eb147
    label: security@temporal.io
  - url: 'https://github.com/temporalio/sqlparser/pull/6'
    label: security@temporal.io
  - url: 'https://github.com/temporalio/sqlparser/pull/7'
    label: security@temporal.io
  - url: 'https://github.com/temporalio/sqlparser/tree/v0.1.0'
    label: security@temporal.io
  - url: >-
      https://github.com/temporalio/temporal/blob/v0.10.0/common/archiver/filestore/queryParser.go#L77-L132
    label: security@temporal.io
  - url: 'https://github.com/temporalio/temporal/pull/11202'
    label: security@temporal.io
  - url: 'https://github.com/temporalio/temporal/releases/tag/v1.30.7'
    label: security@temporal.io
  - url: 'https://github.com/temporalio/temporal/releases/tag/v1.31.3'
    label: security@temporal.io
tags:
  - nvd
  - cve.org
epss: 0.00672
epssPercentile: 0.49908
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-21T15:30:53.004421Z'
cvssSource: cna
ingestedAt: '2026-09-21T12:36:35.287Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.