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.

Sources and references

Verified primary and authoritative sources

CVE-2026-46373 CVE Program record
Publisher, destination, and source semantics verified

URL: https://www.cve.org/CVERecord?id=CVE-2026-46373

CVE Program - Official CVE Program record with source-provided CVE metadata.
CVE-2026-46373 NVD vulnerability detail
Publisher, destination, and source semantics verified

URL: https://nvd.nist.gov/vuln/detail/CVE-2026-46373

NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Mitigation or vendor reference
Unverified legacy reference

URL: https://github.com/sqlfluff/sqlfluff/security/advisories/GHSA-wmhf-fqc8-vxhh

[email protected] - Vendor Advisory

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.