CVE-2022-42966

MEDIUMNVD 5.95.9—

5.9

An exponential ReDoS (Regular Expression Denial of Service) can be triggered in the cleo PyPI package, when an attacker is able to supply arbitrary input to the Table.set_rows method

CVSS v3: 5.9
EG Score: 5.9(medium)
EPSS: 53.3%
KEV: Not listed

Published

November 9, 2022

Last Modified

March 4, 2025

References (2)

reefs@jfroghttps://research.jfrog.com/vulnerabilities/cleo-redos-xray-257186/
af854a3a-2127-422b-91ae-364da2661108https://research.jfrog.com/vulnerabilities/cleo-redos-xray-257186/

Affected Packages

(1 across 1 ecosystem)

PyPI(1)

Package	Vulnerable range	Fixed in	Dependents
cleo	0.2.0 ... 1.0.0a5 (31 versions)	2.0.0	—

Weakness Classification(1)

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

CWE-1333Inefficient Regular Expression Complexity (ReDoS)

Data Freshness Timeline

(refreshed 9× in last 7d / 9× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-27 13:39 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-26 13:43 UTCepss_batch
2026-05-26 13:43 UTCepss_batch
2026-05-26 13:43 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-25 12:25 UTCEG score recompute

Frequently asked(5)

What is CVE-2022-42966?

CVE-2022-42966 is a medium vulnerability published on November 9, 2022. An exponential ReDoS (Regular Expression Denial of Service) can be triggered in the cleo PyPI package, when an attacker is able to supply arbitrary input to the Table.set_rows method

When was CVE-2022-42966 disclosed?

CVE-2022-42966 was first published in the National Vulnerability Database on November 9, 2022, with the most recent update on March 4, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2022-42966 actively exploited?

CVE-2022-42966 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 53.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2022-42966?

CVE-2022-42966 has a CVSS v3 base score of 5.9 (NVD).

How do I remediate CVE-2022-42966?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2022-42966, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2022-42966

Explore →

Is Your Infrastructure Affected by CVE-2022-42966?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs