CVE-2026-21892: Parsl is a Python parallel scripting library

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MEDIUM 5.3REMOTEUPGRADE

CVE-2026-21892 is a medium-severity flaw (CVSS 5.3) affecting parsl. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Parsl is a Python parallel scripting library. A SQL Injection vulnerability exists in the parsl-visualize component of versions prior to 2026.01.05. The application constructs SQL queries using unsafe string formatting (Python % operator) with user-supplied input (workflow_id) directly from URL routes. This allows an unauthenticated attacker with access to the visualization dashboard to inject arbitrary SQL commands, potentially leading to data e

Why this priority

Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.3% (top 80%)
CISA exploited list	No
Weakness	CWE-89
Published	2026-01-08
Last modified	2026-10-06

Publisher (CNA): GitHub, Inc. · Vendor: uchicago

Last updated 2026-10-06 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-01-08 14:15 UTCPublished CVE record published
2026-10-06 22:10 UTCUpdated Record last modified

uchicago parsl UPGRADE

Affected: < 2026.01.05

Fixed in: 2026.01.05

Safe to downgrade to: no unaffected older release

1. Check installed version

pip show parsl

2. UPGRADE to 2026.01.05

pip install --upgrade "parsl>=2026.01.05"

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-2026-21892?

parsl: upgrade to 2026.01.05. Exact commands for each OS are on this page.

Is CVE-2026-21892 being exploited?

CVE-2026-21892 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-2026-21892 affect?

CVE-2026-21892 affects parsl. Severity is medium (CVSS 5.3). Parsl is a Python parallel scripting library. A SQL Injection vulnerability exists in the parsl-visualize component of versions prior to 2026.01.05. The application constructs SQL queries using unsafe string formatting (Python % operator) w

How urgent is CVE-2026-21892?

Priority 34/100. Public exploit reference; Remotely exploitable, no login, no user action

Software pages

Python vulnerabilities

References

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