High
sqlparse — security advisory
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.
- Products
- sqlparse
- Affected versions
- 0.4.2-1, 0.4.2-1+deb12u1, 0.4.4-1, 0.5.0-1, 0.5.1-1, 0.5.1-2, 0.5.2-1, 0.5.3-1, 0.5.4-1, 0.5.5-1, 0.5.5-2
- Fixed versions
- Not specified
- CVEs
- CVE-2026-54284
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 04:07 UTC · Revision 1
Source evidence
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.
osv:DEBIAN-CVE-2026-54284
sqlparse
Fixed versions: Not specified
sqlparse
Fixed versions: Not specified
sqlparse
Fixed versions: Not specified
Complete source record
{
"id": "aab63f8da625155131695d75744c0cf93ca3f4c47e926fb689b9120234376ce5",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-54284",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2026-54284",
"summary": "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.",
"evidence": "osv:DEBIAN-CVE-2026-54284",
"products": [
{
"name": {
"value": "sqlparse",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "0.4.2-1",
"evidence": "/affected/0/versions"
},
{
"value": "0.4.2-1+deb12u1",
"evidence": "/affected/0/versions"
},
{
"value": "0.4.4-1",
"evidence": "/affected/0/versions"
},
{
"value": "0.5.0-1",
"evidence": "/affected/0/versions"
},
{
"value": "0.5.1-1",
"evidence": "/affected/0/versions"
},
{
"value": "0.5.1-2",
"evidence": "/affected/0/versions"
},
{
"value": "0.5.2-1",
"evidence": "/affected/0/versions"
},
{
"value": "0.5.3-1",
"evidence": "/affected/0/versions"
},
{
"value": "0.5.4-1",
"evidence": "/affected/0/versions"
},
{
"value": "0.5.5-1",
"evidence": "/affected/0/versions"
},
{
"value": "0.5.5-2",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "sqlparse",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "0.5.3-1",
"evidence": "/affected/1/versions"
},
{
"value": "0.5.4-1",
"evidence": "/affected/1/versions"
},
{
"value": "0.5.5-1",
"evidence": "/affected/1/versions"
},
{
"value": "0.5.5-2",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "sqlparse",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "0.5.3-1",
"evidence": "/affected/2/versions"
},
{
"value": "0.5.4-1",
"evidence": "/affected/2/versions"
},
{
"value": "0.5.5-1",
"evidence": "/affected/2/versions"
},
{
"value": "0.5.5-2",
"evidence": "/affected/2/versions"
}
]
}
],
"severity": "high",
"structured": {
"id": "DEBIAN-CVE-2026-54284",
"aliases": [
"DEBIAN-CVE-2026-54284"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "sqlparse",
"purl": "pkg:deb/debian/sqlparse?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"0.4.2-1",
"0.4.2-1+deb12u1",
"0.4.4-1",
"0.5.0-1",
"0.5.1-1",
"0.5.1-2",
"0.5.2-1",
"0.5.3-1",
"0.5.4-1",
"0.5.5-1",
"0.5.5-2"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-54284.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "sqlparse",
"purl": "pkg:deb/debian/sqlparse?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"0.5.3-1",
"0.5.4-1",
"0.5.5-1",
"0.5.5-2"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-54284.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "sqlparse",
"purl": "pkg:deb/debian/sqlparse?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"0.5.3-1",
"0.5.4-1",
"0.5.5-1",
"0.5.5-2"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-54284.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-24T09:47:31.206070036Z",
"provider": "osv",
"upstream": [
"CVE-2026-54284"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2026-54284"
]
},
"related_cves": [
{
"value": "CVE-2026-54284",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 429000,
"published_at": "2026-08-17T18:17:11.4+00:00"
}