CVE-2026-65651: temporalio/sqlparser deeply nested unary expressions can cause a fatal stack overflow during AST traversal
Noroxi assessment
Priority: Monitor (action score 34/100)
- The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
- Probability of exploitation in the next 30 days: 0.67% (FIRST EPSS); higher than 52.2% of all records.
- Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
- Fixed version: Temporal Technologies, Inc. Temporal Server 1.30.7, 1.31.3; Temporal Technologies, Inc. temporalio/sqlparser 0.0.0-20260721183058-0466b6b405ac.
Low priority for now. Upgrade to Temporal Technologies, Inc. Temporal Server 1.30.7, 1.31.3; Temporal Technologies, Inc. temporalio/sqlparser 0.0.0-20260721183058-0466b6b405ac or later.
Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it
Primary sources: NVD · CVE.org · FIRST EPSS
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.
- Published
- Sep 21, 2026
- Updated
- Sep 22, 2026
- EPSS
- 0.6% · 52th percentile
- CWE
- CWE-674
Report tools
Action score
34
Monitor
Low priority for now.
- CVSS
- 34 / 40 · 8.7 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.6%
CISA SSVC decision
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
Vulnrichment: CISA's decision-tree inputs.
CNA vs NVD score
- NVD
- —
- CNA · Temporal
- 8.7
- NVD has not scored this yet; the score shown is the CNA’s.
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
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Get told when this record changes
- Not in KEV: no record of exploitation in the wild
- No public exploit code on record
- A fix has been released
If any of these changes, we'll tell you in the daily email digest.
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Noroxi analysis
What does it mean in your environment?
The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.
We use this product, ask for helpAffected systems
Is your version affected?
Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.
—
Versions reported by the vendor
Affected version ranges reported by the assigning authority (Temporal). Independent of NVD's CPE analysis and usually ahead of it.
Temporal Technologies, Inc. Temporal Server
- 0.0.0 and later · before 0.10.0unknown · semver
- 0.10.0 and later · up to and including 1.29.7affected · semver
- 1.30.0 and later · before 1.30.7affected · semver
- 1.31.0 and later · before 1.31.3affected · semver
Temporal Technologies, Inc. temporalio/sqlparser
- 0.0.0-20141206041240-1aae9baceee8 and later · before 0.0.0-20260721183058-0466b6b405acaffected · semver
Same product
Other highest-scoring records for the same primary product.
- CVE-2026-16651temporalio/sqlparser malformed MySQL version comments can cause a panic34Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| Temporal Technologies, Inc. Temporal Server | 1.30.7 | Vendor (CNA) |
| Temporal Technologies, Inc. Temporal Server | 1.31.3 | Vendor (CNA) |
| Temporal Technologies, Inc. temporalio/sqlparser | 0.0.0-20260721183058-0466b6b405ac | Vendor (CNA) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- Integrity
- Availability
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- X
Weakness class (CWE)
CWE-674 · Uncontrolled RecursionCVSS vector
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
nvd-secondary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
ATT&CK techniques
—
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
Show all references (8 more)Show less
- github.com/temporalio/sqlparser/commit/1aae9baceee8e48525da8f56b07bf6a5ca7eb147
- github.com/temporalio/sqlparser/pull/6
- github.com/temporalio/sqlparser/pull/7
- github.com/temporalio/sqlparser/tree/v0.1.0
- github.com/temporalio/temporal/blob/v0.10.0/common/archiver/filestore/queryParser.go#L77-L132
- github.com/temporalio/temporal/pull/11202
- github.com/temporalio/temporal/releases/tag/v1.30.7
- github.com/temporalio/temporal/releases/tag/v1.31.3
Vendor advisories and official records. Exploit/PoC links are deliberately left out.