temporalio/sqlparser deeply nested unary expressions can cause a fatal stack overflow during AST traversal
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
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| Temporal Technologies, Inc. | temporalio/sqlparser | unaffected |
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| Temporal Technologies, Inc. | Temporal Server | unaffected |
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| Temporal | Sqlparser |
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| Temporal | Temporal |
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Vendor Solution
Upgrade github.com/temporalio/sqlparser to v0.0.0-20260721183058-0466b6b405ac or later; v0.0.0-20260722001706-17d16cfe1da5 is the preferred upgrade. Temporal Server operators should upgrade to 1.30.7, 1.31.3, or 1.32.0, as appropriate for the deployed minor release line. The parser changes reject excessive nesting before recursive AST consumers receive an attacker-deep tree.
Vendor Workaround
Applications can impose a conservative query-size or nesting limit before parsing and avoid recursively formatting or walking parser-produced trees derived from untrusted input. Temporal Server 1.29 and 1.30 operators can disable ListWorkers when it is unused, disable unused archival reads, and restrict namespace read permission to trusted principals. Go panic recovery is not an effective mitigation for runtime-fatal stack overflow.
No CVSS v3.1
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.672% probability within 30 days)
| Type | Values Removed | Values Added |
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| First Time appeared |
Temporal sqlparser
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| Vendors & Products |
Temporal sqlparser
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| Type | Values Removed | Values Added |
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| Metrics |
ssvc
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| Type | Values Removed | Values Added |
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| 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. | |
| Title | temporalio/sqlparser deeply nested unary expressions can cause a fatal stack overflow during AST traversal | |
| First Time appeared |
Temporal
Temporal temporal |
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| Weaknesses | CWE-674 | |
| CPEs | cpe:2.3:a:temporal:temporal:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Temporal
Temporal temporal |
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| References |
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| Metrics |
cvssV4_0
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