Medium (5.9) in configobj project configobj. EPSS 1.3% chance of exploitation in the next 30 days. Fixed in configobj 5.0.9.
All versions of the package configobj are vulnerable to Regular Expression Denial of Service (ReDoS) via the validate function, using (.+?)\((.*)\).
**Note:** This is only exploitable in the case of a developer, putting the offending value in a server side configuration file.
Severity
CVSS 3.1
5.9 medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS
1.3% chance of exploitation in the next 30 days; higher than 69% of CVEs (scores of 2026-10-31)