sqlparse is a non-validating SQL parser module for Python. In sqlparse versions 0.4.0 and 0.4.1 there is a regular Expression Denial of Service in sqlparse vulnerability. The regular expression may cause exponential backtracking on strings containing many repetitions of '\r\n' in SQL comments. Only the formatting feature that removes comments from SQL statements is affected by this regular expression. As a workaround don't use the sqlformat.format function with keyword strip_comments=True or the --strip-comments command line flag when using the sqlformat command line tool. The issues has been fixed in sqlparse 0.4.2.
Metrics
Affected Vendors & Products
Advisories
| Source | ID | Title |
|---|---|---|
Debian DLA |
DLA-4000-1 | sqlparse security update |
EUVD |
EUVD-2021-0250 | sqlparse is a non-validating SQL parser module for Python. In sqlparse versions 0.4.0 and 0.4.1 there is a regular Expression Denial of Service in sqlparse vulnerability. The regular expression may cause exponential backtracking on strings containing many repetitions of '\\r\\n' in SQL comments. Only the formatting feature that removes comments from SQL statements is affected by this regular expression. As a workaround don't use the sqlformat.format function with keyword strip_comments=True or the --strip-comments command line flag when using the sqlformat command line tool. The issues has been fixed in sqlparse 0.4.2. |
Github GHSA |
GHSA-p5w8-wqhj-9hhf | StripComments filter contains a regular expression that is vulnerable to ReDOS (Regular Expression Denial of Service) |
Ubuntu USN |
USN-5085-1 | SQL parse vulnerability |
Fixes
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
References
History
Mon, 03 Nov 2025 22:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| References |
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Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2025-11-03T21:44:47.559Z
Reserved: 2021-05-12T00:00:00.000Z
Link: CVE-2021-32839
No data.
Status : Modified
Published: 2021-09-20T17:15:09.067
Modified: 2025-11-03T22:15:48.650
Link: CVE-2021-32839
OpenCVE Enrichment
No data.
Debian DLA
EUVD
Github GHSA
Ubuntu USN