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Advisory record · GHSA-f2ff-p2ww-7p4p

sqlparse: Quadratic O(n²) DoS in group_comments

CVSS 8.7 HighEPSS 0.0026 · 18th percentile

Published by the GitHub Advisory Database at 17 Aug 2026, 17:21 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
sqlparsePyPI<0.6.00.6.0
Identifiers
GHSA-f2ff-p2ww-7p4p · CVE-2026-71491 · PYSEC-2026-3697
Weakness (CWE)
CWE-400 · CWE-407
Tags
Published
17 Aug 2026
Updated
10 Sept 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

sqlparse versions before 0.6.0 are vulnerable to a denial of service via a statement made of many single-line comments, where parsing time grows quadratically with input size. An attacker who can supply SQL text to sqlparse.parse() or to format() with strip_comments enabled can make the process consume large amounts of CPU. Upgrade to sqlparse 0.6.0 or later.

Written 1 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
8.7 High 4.0 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 CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0026, the 18th percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:10 UTC First seen by agentprime
  2. 31 Oct 2026, 14:10 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.