Medium
sqlparse — security advisory
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.
- Products
- sqlparse
- Affected versions
- 0.1.13-2ubuntu2, 0.1.18-1, 0.1.18-1ubuntu0.1~esm1, 0.2.2-1, 0.2.4-0.1, 0.2.4-0.1ubuntu0.1, 0.2.4-0.1ubuntu0.1+esm1, 0.2.4-1, 0.2.4-1build1, 0.2.4-2, 0.2.4-3, 0.2.4-3ubuntu0.1, 0.2.4-3ubuntu0.1+esm1, 0.4.1-1ubuntu1, 0.4.2-1, 0.4.2-1ubuntu0.22.04.1, 0.4.2-1ubuntu0.22.04.2, 0.4.2-1ubuntu0.22.04.3, 0.4.2-1ubuntu1, 0.4.4-1, 0.4.4-1ubuntu0.1, 0.4.4-1ubuntu0.2, 0.5.3-1, 0.5.4-1, 0.5.4-1ubuntu0.1, 0.5.5-2, 0.5.5-2ubuntu1
- Fixed versions
- Not specified
- CVEs
- CVE-2026-84305
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 03:22 UTC · Revision 1
Source evidence
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.
osv:UBUNTU-CVE-2026-84305
sqlparse
Fixed versions: Not specified
sqlparse
Fixed versions: Not specified
sqlparse
Fixed versions: Not specified
sqlparse
Fixed versions: Not specified
sqlparse
Fixed versions: Not specified
sqlparse
Fixed versions: Not specified
sqlparse
Fixed versions: Not specified
Complete source record
{
"id": "b2416cff523a6b765c7cc3479c73e6b4ab6bb92337596e263d3996d6c03d3612",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-84305",
"method": "structured",
"payload": {
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"title": "UBUNTU-CVE-2026-84305",
"summary": "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.",
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"modified": "2026-10-17T13:01:12.462103282Z",
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"source_id": "core-osv",
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"published_at": "2026-09-01T19:17:00+00:00"
}