CVE-2026-54284 sqlparse: TokenList.__init__ materializes O(subtree) value per group, causing CPU DoS before depth/token caps trigger

sqlparse is a non-validating SQL parser module for Python. Prior to 0.6.0, TokenList construction and string conversion in sqlparse/sql.py repeatedly flatten nested token subtrees constructed by groupparenthesis and groupcase, causing quadratic CPU consumption through sqlparse.parse,...

CVE-2026-54284

sqlparse is a non-validating SQL parser module for Python. Prior to 0.6.0, TokenList construction and string conversion in sqlparse/sql.py repeatedly flatten nested token subtrees constructed by groupparenthesis and groupcase, causing quadratic CPU consumption through sqlparse.parse,...

CVE-2026-54284 sqlparse: TokenList.__init__ materializes O(subtree) value per group, causing CPU DoS before depth/token caps trigger

sqlparse is a non-validating SQL parser module for Python. Prior to 0.6.0, TokenList construction and string conversion in sqlparse/sql.py repeatedly flatten nested token subtrees constructed by groupparenthesis and groupcase, causing quadratic CPU consumption through sqlparse.parse,...

CVE-2026-54284

sqlparse versions before 0.6.0 have a CPU DoS flaw: TokenList.__init__ calls str(self), which recursively flattens the entire subtree on every group construction, producing O(n*d) cost. A ~2 KB deeply-nested SQL payload pins a worker for ~10 seconds (~5000x amplification). Flask-based SQL formatt...

CVE-2026-54284 sqlparse: TokenList.__init__ materializes O(subtree) value per group, causing CPU DoS before depth/token caps trigger

sqlparse is a non-validating SQL parser module for Python. Prior to 0.6.0, TokenList construction and string conversion in sqlparse/sql.py repeatedly flatten nested token subtrees constructed by groupparenthesis and groupcase, causing quadratic CPU consumption through sqlparse.parse,...

CVE-2026-54284

sqlparse is a non-validating SQL parser module for Python. Prior to 0.6.0, TokenList construction and string conversion in sqlparse/sql.py repeatedly flatten nested token subtrees constructed by groupparenthesis and groupcase, causing quadratic CPU consumption through sqlparse.parse,...

CVE-2026-59893 sqlparse: Inefficient Regex Handling of Dollar-Quoted SQL Literals Leads to ReDoS (Denial of Service)

sqlparse is a non-validating SQL parser module for Python. Prior to 0.6.0, SQLREGEX in sqlparse/keywords.py and the per-position loop in sqlparse/lexer.py repeatedly scan unmatched dollar-quoted literal and multiline-comment delimiters, causing quadratic CPU consumption through sqlparse.parse,...

CVE-2026-59893 sqlparse: Inefficient Regex Handling of Dollar-Quoted SQL Literals Leads to ReDoS (Denial of Service)

sqlparse is a non-validating SQL parser module for Python. Prior to 0.6.0, SQLREGEX in sqlparse/keywords.py and the per-position loop in sqlparse/lexer.py repeatedly scan unmatched dollar-quoted literal and multiline-comment delimiters, causing quadratic CPU consumption through sqlparse.parse,...

CVE-2026-59893

sqlparse is a non-validating SQL parser module for Python. Prior to 0.6.0, SQLREGEX in sqlparse/keywords.py and the per-position loop in sqlparse/lexer.py repeatedly scan unmatched dollar-quoted literal and multiline-comment delimiters, causing quadratic CPU consumption through sqlparse.parse,...

CVE-2026-59893 sqlparse: Inefficient Regex Handling of Dollar-Quoted SQL Literals Leads to ReDoS (Denial of Service)

sqlparse is a non-validating SQL parser module for Python. Prior to 0.6.0, SQLREGEX in sqlparse/keywords.py and the per-position loop in sqlparse/lexer.py repeatedly scan unmatched dollar-quoted literal and multiline-comment delimiters, causing quadratic CPU consumption through sqlparse.parse,...

CVE-2026-59893

sqlparse is a non-validating SQL parser module for Python. Prior to 0.6.0, SQLREGEX in sqlparse/keywords.py and the per-position loop in sqlparse/lexer.py repeatedly scan unmatched dollar-quoted literal and multiline-comment delimiters, causing quadratic CPU consumption through sqlparse.parse,...

EUVD-2026-60311

sqlparse is a non-validating SQL parser module for Python. Prior to 0.6.0, SQLREGEX in sqlparse/keywords.py and the per-position loop in sqlparse/lexer.py repeatedly scan unmatched dollar-quoted literal and multiline-comment delimiters, causing quadratic CPU consumption through sqlparse.parse,...

CVE-2026-59893

The vulnerability is a ReDoS flaw in sqlparse's lexer: the regex at sqlparse/keywords.py:33 uses a backreference (\1) to match closing dollar-quote delimiters, causing O(n²) CPU consumption when fed many unique, unmatched openers. The same pattern shape affects multiline-comment regexes. A single...

GHSA-F2FF-P2WW-7P4P sqlparse: Quadratic O(n²) DoS in group_comments

Summary A comment-only statement -- c\nn may cause a Denial of Service DoS. Details Location: sqlparse/engine/grouping.py:331-341 groupcomments, invoked first in group at grouping.py:439. Reachable via sqlparse.parse and sqlparse.formatsql, stripcomments=True. A statement made of many single-line...

sqlparse: Quadratic O(n²) DoS in group_comments

Summary A comment-only statement -- c\nn may cause a Denial of Service DoS. Details Location: sqlparse/engine/grouping.py:331-341 groupcomments, invoked first in group at grouping.py:439. Reachable via sqlparse.parse and sqlparse.formatsql, stripcomments=True. A statement made of many single-line...

GHSA-3496-9G83-7V6X sqlparse: Generated Python and PHP snippets allow SQL string breakout through unescaped backslashes

Summary The documented Python and PHP output modes generate source-code snippets from caller-supplied SQL. Their output filters escape quote characters without first escaping existing backslashes. Crafted SQL can therefore neutralize the generated quote escape, terminate the intended language...

sqlparse: Generated Python and PHP snippets allow SQL string breakout through unescaped backslashes

Summary The documented Python and PHP output modes generate source-code snippets from caller-supplied SQL. Their output filters escape quote characters without first escaping existing backslashes. Crafted SQL can therefore neutralize the generated quote escape, terminate the intended language...

Arbitrary Code Injection

Overview Affected versions of this package are vulnerable to Arbitrary Code Injection in the process method of sqlparse/filters/output.py when generating output via the Python and PHP output formatters. The formatters previously only escaped quote characters ' or " but did not first escape...

CVE-2026-71491 sqlparse: Quadratic O(n²) DoS in group_comments

sqlparse is a non-validating SQL parser module for Python. Prior to 0.6.0, groupcomments in sqlparse/engine/grouping.py repeatedly rescans comment-only statements before the MAXGROUPINGTOKENS guard, causing quadratic CPU consumption through sqlparse.parse and sqlparse.formatsql, stripcomments=Tru...

CVE-2026-71491 sqlparse: Quadratic O(n²) DoS in group_comments

sqlparse is a non-validating SQL parser module for Python. Prior to 0.6.0, groupcomments in sqlparse/engine/grouping.py repeatedly rescans comment-only statements before the MAXGROUPINGTOKENS guard, causing quadratic CPU consumption through sqlparse.parse and sqlparse.formatsql, stripcomments=Tru...