CVE-2026-656518.7HighCWE-674

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

Temporal Technologies, Inc. · temporalio/sqlparser

Vendor fix available · Affected: Temporal Technologies, Inc. temporalio/sqlparser · Exploitation: unlikely (under 1%)

Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.

0.7%probability of exploitation in the next 30 days

52nd percentile

050100

Higher than 52% of scored CVEs

8.7HighCVSS 4.0

LowMediumHighCrit.

DescriptionCVE.org

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.

Affected products2

From the CVE record. A product or version that is not listed is unknown, not unaffected.

Temporal Technologies, Inc. · temporalio/sqlparserfrom 0.0.0-20141206041240-1aae9baceee8 before 0.0.0-20260721183058-0466b6b405ac
Temporal Technologies, Inc. · Temporal Serverfrom 0.10.0 up to and including 1.29.7; from 1.30.0 before 1.30.7; from 1.31.0 before 1.31.3

On the Atlas

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Open the Atlas

Exploitation: Unlikely (under 1%). EPSS under 1%, or no score yet.
CISA KEV: Not listed
Public check: No public nuclei template
Weakness: Uncontrolled Recursion · Denial of Service
Vendor: Temporal Technologies, Inc.
Published: September 2026
Band: Unlikely (under 1%), September 2026

CoverageNo articles yet

No CyberSIXT article names CVE-2026-65651 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.