GHSA-27jp-wm6q-gp25: sqlparse Denial of Service Vulnerability

MODERATE
Share
CWE-770
Published
Advisory Summary

GHSA-27jp-wm6q-gp25 is a MODERATE denial of service vulnerability (CWE-770: Allocation of Resources Without Limits or Throttling) affecting sqlparse libraries in the PyPI ecosystem. The issue involves formatting list of tuples leads to denial of service. Remediation is available by upgrading affected packages to version 0.5.4.

GHSA-27jp-wm6q-gp25 at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-27jp-wm6q-gp25
Severity MODERATE
CVSS v3.1 Base Score N/A
CWE Classification CWE-770: Allocation of Resources Without Limits or Throttling
Affected Product sqlparse
Package Ecosystem PyPI
Published Date
Last Updated

How to Fix GHSA-27jp-wm6q-gp25

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

sqlparse fixed: 0.5.4 
pip install sqlparse>=0.5.4
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 sqlparse

How to Check if You Are Affected

To determine whether your Python environment is affected by GHSA-27jp-wm6q-gp25, inspect your installed packages using pip:

pip show sqlparse

Analyze the terminal output to locate any version of sqlparse in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.5.4), your application is affected.

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

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-770: Allocation of Resources Without Limits or Throttling, where the product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated. In sqlparse, 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

### Summary The below gist hangs while attempting to format a long list of tuples. This was found while [drafting a regression test for Dja ngo 5.2's composite primary key feature](https://code.djangoproject.com/ticket/36416#comment:3), which allows querying composite fields with tuples. ###

GHSA-27jp-wm6q-gp25 Affected sqlparse Versions

1 component(s)
Fixed Versions:
0.5.4
Product / Package Ecosystem Affected Versions Fixed Version
sqlparse
pypi/sqlparse
PyPI
< 0.5.4
0.5.4

References

GitHub Advisory / Wiki ADVISORY
https://github.com/andialbrecht/sqlparse/security/advisories/GHSA-27jp-wm6q-gp25
Security Fix Commit FIX COMMIT
https://github.com/andialbrecht/sqlparse/commit/40ed3aa958657fa4a82055927fa9de70ab903360
sqlparse Source Repository REPOSITORY
https://github.com/andialbrecht/sqlparse
sqlparse Release RELEASE
https://github.com/andialbrecht/sqlparse/releases/tag/0.5.4

Frequently Asked Questions

What is GHSA-27jp-wm6q-gp25?
GHSA-27jp-wm6q-gp25 is a security vulnerability in sqlparse involving formatting list of tuples leads to denial of service under CWE-770: Allocation of Resources Without Limits or Throttling.
Which sqlparse versions are affected?
Affected versions include releases prior to 0.5.4 across affected packages: sqlparse.
What version fixes GHSA-27jp-wm6q-gp25?
Upgrading to 0.5.4 (or the latest patched release for your respective branch) resolves the vulnerability.
Is sqlparse affected?
Yes, sqlparse is affected in releases prior to 0.5.4. Upgrade your dependency to 0.5.4 or later.
What CWE is associated with GHSA-27jp-wm6q-gp25?
GHSA-27jp-wm6q-gp25 is classified under CWE-770: Allocation of Resources Without Limits or Throttling (The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.).
How can I check PyPI dependencies for GHSA-27jp-wm6q-gp25?
Run the dependency tree command: 'pip show sqlparse'. 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-27jp-wm6q-gp25",
  "modified" : "2026-02-13T16:16:11Z",
  "published" : "2026-02-13T16:16:11Z",
  "aliases" : [ ],
  "summary" : "sqlparse: formatting list of tuples leads to denial of service",
  "details" : "### Summary\nThe below gist hangs while attempting to format a long list of tuples.\n\nThis was found while [drafting a regression test for Dja\nngo 5.2's composite primary key feature](https://code.djangoproject.com/ticket/36416#comment:3), which allows querying composite fields with tuples.\n\n###",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "sqlparse"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.5.4"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 0.5.3"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/andialbrecht/sqlparse/security/advisories/GHSA-27jp-wm6q-gp25"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/andialbrecht/sqlparse/commit/40ed3aa958657fa4a82055927fa9de70ab903360"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/andialbrecht/sqlparse"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/andialbrecht/sqlparse/releases/tag/0.5.4"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-770" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-02-13T16:16:11Z",
    "nvd_published_at" : null
  }
}