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CVE-2026-84305

sqlparse: Reindentation of tuple lists causes near-cap quadratic CPU consumption

sqlparse is a non-validating SQL parser module for Python. Prior to 0.6.0, sqlparse.format(sql, reindent=True) and sqlformat --reindent route attacker-controlled parenthesized tuple lists through ReindentFilter._get_offset() in sqlparse/filters/reindent.py, where _flatten_up_to_token() repeatedly rebuilds and joins the statement prefix. Thousands of offset calculations walk an expanding token tree, producing quadratic CPU consumption for inputs that remain below MAX_GROUPING_TOKENS and causing request delays, reduced throughput, or worker starvation. This issue is fixed in version 0.6.0.

CVSS 4.0 · 5.1 Medium EPSS < 1% KEV · Not listed
Vendors
Andialbrecht
Products
Sqlparse
CVE-2026-59894

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

sqlparse is a non-validating SQL parser module for Python. Prior to 0.6.0, sqlparse/filters/output.py fails to escape existing backslashes before quotes in sqlparse.format output_format='python' and output_format='php' and the corresponding sqlformat -l modes, allowing crafted SQL to terminate the generated string and inject Python or PHP code when a downstream consumer executes or imports the generated source. This issue is fixed in version 0.6.0.

CVSS 4.0 · 6.2 Medium EPSS < 1% KEV · Not listed
Vendors
Andialbrecht
Products
Sqlparse
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, group_comments in sqlparse/engine/grouping.py repeatedly rescans comment-only statements before the MAX_GROUPING_TOKENS guard, causing quadratic CPU consumption through sqlparse.parse() and sqlparse.format(sql, strip_comments=True). This issue is fixed in version 0.6.0.

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
Vendors
Andialbrecht
Products
Sqlparse
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, SQL_REGEX 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(), sqlparse.format(), and sqlparse.split(). This issue is fixed in version 0.6.0.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
Vendors
Andialbrecht
Products
Sqlparse
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 group_parenthesis and group_case, causing quadratic CPU consumption through sqlparse.parse(), sqlparse.format(), and sqlparse.split() before depth and token limits terminate processing. This issue is fixed in version 0.6.0.

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
Vendors
Andialbrecht
Products
Sqlparse