Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-2m57-hf25-phgg. This link is maintained to preserve external references. Original Description Passing a heavily nested list to sqlparse.parse() leads to a Denial of Service due to RecursionError.
Passing a heavily nested list to sqlparse.parse() leads to a Denial of Service due to RecursionError.
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.
sqlparse is a non-validating SQL parser module for Python. There is a regular Expression Denial of Service in sqlparse vulnerability. The regular expression may cause exponential backtracking on strings containing many repetitions of in SQL comments. Only the formatting feature that removes comments from SQL statements is affected by this regular expression.