Vulnerability · Published Nov 9, 2022 · Assigned by JFROG
CVE-2022-42966Exponential ReDoS in cleo leads to denial of service
Medium 5.9
In plain English
A medium-severity regular-expression denial of service in cleo from cleo. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 1.2% (higher than 67% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)5.9Medium
Exploit odds (30 days)1.2%top 32.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official 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 packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| PyPI | cleo | 2.0.0 | GHSA-2p9h-ccw7-33gf |
| PyPI | cleo | 2.0.0 | PYSEC-2022-43178 |
| Ubuntu:22.04:LTS | python-cleo | no fix listed | UBUNTU-CVE-2022-42966 |
| Ubuntu:24.04:LTS | python-cleo | no fix listed | UBUNTU-CVE-2022-42966 |
| Ubuntu:25.10 | python-cleo | no fix listed | UBUNTU-CVE-2022-42966 |
| Ubuntu:26.04:LTS | python-cleo | no fix listed | UBUNTU-CVE-2022-42966 |
| Ubuntu:26.10 | python-cleo | no fix listed | UBUNTU-CVE-2022-42966 |
Affected products (as reported)
Weakness: CWE-1333 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H