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

CVE-2026-54284

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

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
andialbrecht / sqlparse	affected < 0.6.0

CWE

CWE-407, CWE-1333

References

https://github.com/andialbrecht/sqlparse/security/advisories/GHSA-pwgv-4x5q-6m9f
https://github.com/andialbrecht/sqlparse/commit/939b129e24c0ad5d51368b1aa72fffcaca76f06f

ADP enrichment

CISA-ADP

No English description supplied.

https://github.com/andialbrecht/sqlparse/security/advisories/GHSA-pwgv-4x5q-6m9f