What’s Vulnerable › Vulnerabilities

CVE-2022-42966: Exponential ReDoS in cleo leads to denial of service

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.0% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2022-11-09 · updated 2026-06-17
• Weakness: CWE-1333

Description

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

Affected products

• cleo: before 2.0.0 — fixed in 2.0.0
• Pypi Cleo: before 2.0.0; 0.2.0, 0.2.1, 0.3.0, 0.4.0, 0.4.1, 0.5.0 (+25) — fixed in 2.0.0

How to fix

Upgrade to a fixed version: cleo 2.0.0; Pypi Cleo 2.0.0. Check the vendor advisory for mitigations.

References

• https://research.jfrog.com/vulnerabilities/cleo-redos-xray-257186/
• https://research.jfrog.com/vulnerabilities/cleo-redos-xray-257186/

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