CVE-2023-30608: Parser contains an inefficient regular expression in sqlparse

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.0% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-04-18 · updated 2026-06-17
Weakness: CWE-1333

Description

sqlparse is a non-validating SQL parser module for Python. In affected versions the SQL parser contains a regular expression that is vulnerable to ReDoS (Regular Expression Denial of Service). This issue was introduced by commit `e75e358`. The vulnerability may lead to Denial of Service (DoS). This issues has been fixed in sqlparse 0.4.4 by commit `c457abd5f`. Users are advised to upgrade. There are no known workarounds for this issue.

Affected products

Debian Linux: 10.0
andialbrecht sqlparse: from 0.1.15 before 0.4.4 — fixed in 0.4.4
Pypi Sqlparse: from 0.1.15 before 0.4.4; 0.1.15, 0.1.16, 0.1.17, 0.1.18, 0.1.19, 0.2.0 (+10) — fixed in 0.4.4

How to fix

Upgrade to a fixed version: andialbrecht sqlparse 0.4.4; Pypi Sqlparse 0.4.4. Check the vendor advisory for mitigations.

References

Get alerted when CVE-2023-30608 or the next vulnerability affects your stack