CVE-2026-46374: SQLFluff Remote Code Execution Vulnerability

HIGH
Advisory Identifier: GHSA-73jc-5mrq-prw7
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CVSS 7.5
CWE-400
Published
Advisory Summary

CVE-2026-46374 is a HIGH (CVSS 7.5) remote code execution vulnerability (CWE-400: Uncontrolled Resource Consumption) affecting SQLFluff libraries in the PyPI ecosystem. The issue involves uncontrolled resource consumption in sqlfluff parser. Remediation is available by upgrading affected packages to version 4.2.0.

CVE-2026-46374 at a Glance

CVE Identifier CVE-2026-46374
GHSA Identifier GHSA-73jc-5mrq-prw7
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-400: Uncontrolled Resource Consumption
Affected Product SQLFluff
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 7.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity None (I:N)
Availability High (A:H)

How to Fix CVE-2026-46374

To remediate this vulnerability, upgrade all affected SQLFluff dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

sqlfluff fixed: 4.2.0 
pip install sqlfluff>=4.2.0
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

pip show sqlfluff

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2026-46374, inspect your installed packages using pip:

pip show sqlfluff

Analyze the terminal output to locate any version of SQLFluff in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 4.2.0), your application is affected.

Note: The pip show sqlfluff command checks currently installed packages in your active Python environment.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-400: Uncontrolled Resource Consumption, where the product does not properly control the allocation and maintenance of a limited resource. In SQLFluff, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### Impact In deployments where untrusted users can provide SQL queries to be linted, an untrusted user can submit a malicious long query to any application using the parser to trigger a Denial of Service through resource exhaustion. ### Patches Versions 4.2.0 and up contain a configurable parse node limit, which is enabled by default, to prevent this manner of exploit. ### Credit Ori Nakar from Imperva Threat Research Team.

CVE-2026-46374 Affected SQLFluff Versions

1 component(s)
Fixed Versions:
4.2.0
Product / Package Ecosystem Affected Versions Fixed Version
sqlfluff
pypi/sqlfluff
PyPI
< 4.2.0
4.2.0

References

GitHub Advisory / Wiki ADVISORY
https://github.com/sqlfluff/sqlfluff/security/advisories/GHSA-73jc-5mrq-prw7
NVD — CVE-2026-46374 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-46374
SQLFluff Source Repository REPOSITORY
https://github.com/pypa/advisory-database/tree/main/vulns/sqlfluff/PYSEC-2026-210.yaml
SQLFluff Source Repository REPOSITORY
https://github.com/sqlfluff/sqlfluff

Frequently Asked Questions

What is CVE-2026-46374?
CVE-2026-46374 is a security vulnerability in SQLFluff involving Uncontrolled Resource Consumption in SQLFluff Parser under CWE-400: Uncontrolled Resource Consumption.
Which SQLFluff versions are affected?
Affected versions include releases prior to 4.2.0 across affected packages: sqlfluff.
What version fixes CVE-2026-46374?
Upgrading to 4.2.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is sqlfluff affected?
Yes, sqlfluff is affected in releases prior to 4.2.0. Upgrade your dependency to 4.2.0 or later.
What is the CVSS score of CVE-2026-46374?
CVE-2026-46374 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2026-46374?
CVE-2026-46374 is classified under CWE-400: Uncontrolled Resource Consumption (The product does not properly control the allocation and maintenance of a limited resource.).
How can I check PyPI dependencies for CVE-2026-46374?
Run the dependency tree command: 'pip show sqlfluff'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-73jc-5mrq-prw7",
  "modified" : "2026-07-06T22:53:28Z",
  "published" : "2026-05-19T20:10:53Z",
  "aliases" : [ "CVE-2026-46374" ],
  "summary" : "SQLFluff: Uncontrolled Resource Consumption in SQLFluff Parser",
  "details" : "### Impact\n\nIn deployments where untrusted users can provide SQL queries to be linted, an untrusted user can submit a malicious long query to any application using the parser to trigger a Denial of Service through resource exhaustion.\n\n### Patches\n\nVersions 4.2.0 and up contain a configurable parse node limit, which is enabled by default, to prevent this manner of exploit.\n\n### Credit\n\nOri Nakar from Imperva Threat Research Team.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "sqlfluff"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "4.2.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/sqlfluff/sqlfluff/security/advisories/GHSA-73jc-5mrq-prw7"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-46374"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pypa/advisory-database/tree/main/vulns/sqlfluff/PYSEC-2026-210.yaml"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/sqlfluff/sqlfluff"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-400" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-05-19T20:10:53Z",
    "nvd_published_at" : "2026-06-09T23:16:59Z"
  }
}