CVE-2026-71491: sqlparse is a non-validating SQL parser module for Python

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HIGH 8.7REMOTE

CVE-2026-71491 is a high-severity flaw (CVSS 8.7) affecting affected software. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	8.7 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.3% (top 83%)
CISA exploited list	No
Weakness	CWE-400, CWE-407
Published	2026-08-17
Last modified	2026-10-23

Publisher (CNA): GitHub, Inc.

Last updated 2026-10-23 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Timeline

2026-08-17 18:18 UTCPublished CVE record published
2026-10-23 16:10 UTCUpdated Record last modified

Exact fixes by distribution

Python (pip) · sqlparse · FIXED · 0.6.0 · vulnerable: <= 0.5.5 · source

pip install --upgrade "sqlparse>=0.6.0" pip show sqlparse

Fedora ELN · ntpd-rs · FIXED · 1.7.2-3.eln159 · FEDORA-2026-57e4a99310 · source

sudo dnf upgrade --advisory=FEDORA-2026-57e4a99310

Fedora 46 · moby-engine · FIXED · 29.9.2-2.fc46 · FEDORA-2026-4856be87b3 · source

sudo dnf upgrade --advisory=FEDORA-2026-4856be87b3

Ubuntu 20.04 · sqlparse · FIXED · 0.2.4-3ubuntu0.1+esm1

sudo apt update && sudo apt install --only-upgrade sqlparse dpkg --compare-versions "$(dpkg-query -W -f='${Version}' sqlparse)" ge "0.2.4-3ubuntu0.1+esm1" && echo PATCHED || echo STILL-VULNERABLE

Ubuntu 22.04 · sqlparse · FIXED · 0.4.2-1ubuntu0.22.04.3

sudo apt update && sudo apt install --only-upgrade sqlparse dpkg --compare-versions "$(dpkg-query -W -f='${Version}' sqlparse)" ge "0.4.2-1ubuntu0.22.04.3" && echo PATCHED || echo STILL-VULNERABLE

Ubuntu 24.04 · sqlparse · FIXED · 0.4.4-1ubuntu0.2

sudo apt update && sudo apt install --only-upgrade sqlparse dpkg --compare-versions "$(dpkg-query -W -f='${Version}' sqlparse)" ge "0.4.4-1ubuntu0.2" && echo PATCHED || echo STILL-VULNERABLE

Debian 12 · sqlparse · NO FIX YET

Debian 13 · sqlparse · NO FIX YET

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-71491?

No fixed release is listed yet. Watch the vendor advisory and apply any mitigation shown on this page.

Is CVE-2026-71491 being exploited?

CVE-2026-71491 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-71491 affect?

CVE-2026-71491 affects affected software. Severity is high (CVSS 8.7). 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 thro

How urgent is CVE-2026-71491?

Priority 40/100. High severity; Remotely exploitable, no login, no user action

Software pages

Python vulnerabilities

References

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