CVE-2026-71491

Name	CVE-2026-71491
Description	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.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs	1144932

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
sqlparse (PTS)	bookworm	0.4.2-1+deb12u1	vulnerable
	trixie	0.5.3-1	vulnerable
	forky, sid	0.5.5-2	vulnerable

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
sqlparse	source	(unstable)	(unfixed)			1144932

Notes

[trixie] - sqlparse <no-dsa> (Minor issue)
[bookworm] - sqlparse <postponed> (Minor issue)
https://github.com/andialbrecht/sqlparse/security/advisories/GHSA-f2ff-p2ww-7p4p
Fixed by: https://github.com/andialbrecht/sqlparse/commit/ef2012a5eeb491e604dea2b00d516904a3830c87 (0.6.0)