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sqlparse CVE-2026-84305

| EUVDEUVD-2026-69421 MEDIUM
Inefficient Algorithmic Complexity (CWE-407)
2026-09-01 GitHub_M GHSA-cfqr-cjx5-5jcm
Python Sqlparse Andialbrecht
5.1
CVSS 4.0 · Vendor: GitHub_M
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Severity by source

Vendor (GitHub_M) PRIMARY
5.1 MEDIUM
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/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
vuln.today AI
5.3 MEDIUM

Network vector reflects typical web-app exposure; no auth required at library level; only partial availability impact from CPU saturation, no C or I impact.

3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
SUSE
4.0 MEDIUM
AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Primary rating from Vendor (GitHub_M).

CVSS VectorVendor: GitHub_M

Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
X

Lifecycle Timeline

4
Patch available
Sep 01, 2026 - 20:03 EUVD
Metadata Corrected
Sep 01, 2026 - 19:40 vuln.today
tag: Information Disclosure replaced by Denial Of Service
Source Code Evidence Fetched
Sep 01, 2026 - 19:06 vuln.today
Analysis Generated
Sep 01, 2026 - 19:06 vuln.today

Blast Radius

ecosystem impact
† from your stack dependencies † transitive graph · vuln.today resolves 4-path depth
  • 17,569 pypi packages depend on sqlparse (748 direct, 16,882 indirect)

Ecosystem-wide dependent count for version 0.6.0.

DescriptionCVE.org

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.

AnalysisAI

Quadratic CPU exhaustion in sqlparse's reindentation path allows denial of service against any Python application that passes attacker-controlled SQL to sqlparse.format() with reindent=True. The ReindentFilter._get_offset() method formerly rebuilt the full statement prefix from the token tree's root on every call, resulting in O(N²) CPU growth when processing parenthesized tuple lists - such as large IN (...) or INSERT INTO ... …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

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Vulnerability AssessmentAI

Exploitation Exploitation requires that the target application call sqlparse.format() with the reindent=True parameter (or invoke the sqlformat --reindent CLI flag) on attacker-controlled SQL input. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The provided CVSS 4.0 vector (AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L) scores 5.1 and uses AV:L, which reflects library-level invocation context. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Upgrade sqlparse to version 0.6.0 or later, which replaces the O(N²) prefix-rebuild walk with an O(N) backwards walk in ReindentFilter._get_offset(). … Detailed patch versions, workarounds, and compensating controls in full report.
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Vendor StatusVendor

SUSE

Severity: Moderate
Product Status
SUSE Linux Enterprise Desktop 15 SP7 Affected
SUSE Linux Enterprise Module for Package Hub 15 SP7 Affected
SUSE Linux Enterprise Module for Python 3 15 SP7 Affected
SUSE Linux Enterprise Server 15 SP7 Affected
SUSE Linux Enterprise Server 16.0 Affected

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CVE-2026-84305 vulnerability details – vuln.today
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