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PatchSiren cyber security CVE debrief

CVE-2026-46373 sqlfluff CVE debrief

CVE-2026-46373 is a high-severity vulnerability in SQLFluff, a modular SQL linter and auto-formatter. The vulnerability allows an untrusted user to submit a malicious query with deliberate excessive nesting to trigger a Denial of Service (DoS) through resource exhaustion. This issue affects deployments where untrusted users can provide SQL queries to be linted. The vulnerability has been patched in version 4.1.0.

Vendor
sqlfluff
Product
Unknown
CVSS
HIGH 7.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-09
Original CVE updated
2026-06-12
Advisory published
2026-06-09
Advisory updated
2026-06-12

Who should care

Users of SQLFluff, especially those who deploy it in environments where untrusted users can provide SQL queries to be linted.

Technical summary

SQLFluff is vulnerable to a Denial of Service (DoS) attack due to excessive nesting in SQL queries. An untrusted user can submit a malicious query to trigger resource exhaustion. The issue has been fixed in version 4.1.0.

Defensive priority

High

Recommended defensive actions

  • Update SQLFluff to version 4.1.0 or later.
  • Restrict access to SQLFluff to only trusted users.
  • Monitor SQLFluff deployments for excessive resource usage.

Evidence notes

CVE-2026-46373 has a CVSS score of 7.5 and is classified as HIGH severity. The vulnerability was published on 2026-06-09T23:16:59.167Z and modified on 2026-06-12T14:10:04.250Z.

Official resources

CVE-2026-46373 was published on 2026-06-09T23:16:59.167Z and modified on 2026-06-12T14:10:04.250Z.