CVE-2026-71491

HIGHPre-NVD 8.78.7—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.7 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3%, top 82% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — 3 sources updated this week
8.7EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.7Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
8.7
EG Score
8.7(medium)
EG Risk
54(Track)
EG Risk 54/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity87% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
18%
KEV
Not listed

Published

August 17, 2026

Last Modified

August 17, 2026

Advisory Details (2)

Auto-updated Aug 17, 2026
🔬 Proof of concept available. Patch available. Sources: github, github_commit.
github_commit

commit ef2012a5eeb4 (andialbrecht/sqlparse)

Fix landed in andialbrecht/sqlparse commit ef2012a5eeb4 — awaiting tagged release

https://github.com/andialbrecht/sqlparse/commit/ef2012a5eeb491e604dea2b00d516904a3830c87
github Patch Available🟡 PoC Available

Quadratic O(n²) DoS in group_comments · Advisory · andialbrecht/sqlparse · GitHub

https://github.com/andialbrecht/sqlparse/security/advisories/GHSA-f2ff-p2ww-7p4p

Vendor Advisories for CVE-2026-71491(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 11× in last 7d / 11× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-08-20 22:56 UTCEPSS rescore
  2. 2026-08-19 22:38 UTCEG score recompute
  3. 2026-08-19 17:04 UTCEPSS rescore
  4. 2026-08-18 22:29 UTCEG score recompute
  5. 2026-08-18 13:49 UTCEPSS rescore
  6. 2026-08-18 13:49 UTCEPSS rescore
  7. 2026-08-17 22:22 UTCEG score recompute
  8. 2026-08-17 22:09 UTCEG score recompute
  9. 2026-08-17 18:29 UTCEG score recompute
  10. 2026-08-17 17:30 UTCEG score recompute
  11. 2026-08-17 17:29 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-71491?
CVE-2026-71491 is a high vulnerability published on August 17, 2026. sqlparse is a non-validating SQL parser module for Python. Prior to 0.6.0, groupcomments in sqlparse/engine/grouping.py repeatedly rescans comment-only statements before the MAXGROUPINGTOKENS guard, causing quadratic CPU consumption through sqlparse.parse() and sqlparse.format(sql,…
When was CVE-2026-71491 disclosed?
CVE-2026-71491 was first published in the National Vulnerability Database on August 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-71491 actively exploited?
CVE-2026-71491 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 81.7% of all scored CVEs.
What is the CVSS score of CVE-2026-71491?
CVE-2026-71491 has a CVSS v3 base score of 8.7 (NVD).
How do I remediate CVE-2026-71491?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-71491, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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