SQLFluff: Recursive Stack Overflow in Parser — CVE-2026-46373

Summary

### Impact In deployments where untrusted users can provide SQL queries to be linted, an untrusted user can submit a malicious query with deliberate excessive nesting to any application using the parser to trigger a Denial of Service through resource exhaustion. ### Patches Versions 4.1.0 and up contain a configurable recursion limit, which is enabled by default, to prevent this manner of exploit. ### Credit Ori…

Product

pip: sqlfluff

What to do

General, cautious steps (verify details in the official source):

• Prioritize patching or mitigation immediately (treat as actively risky).
• Identify affected product versions in your inventory and verify whether you are impacted.
• Apply vendor patches/updates or recommended mitigations as soon as available.
• Read the official advisory for exact affected versions and remediation steps.

Official advisory

• Read the official source
• CVE Record
• NVD

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