CVE-2026-67991
High
Description
crmne/ruby_llm at commit fa6f279847d6d7027814539d9c0dfc3bbdfd2a83 contains a polynomial-time regular expression denial-of-service condition in RubyLLM::Utils.underscore on Ruby 3.1.x. A very long crafted class, agent, or tool name can cause excessive CPU consumption and a denial of service.
SeverityHigh
CVSS7.5
Exploit probability—
Product
Crmne Ruby Llm
PublishedAug 13, 2026
First seenAug 13, 2026
Weakness typeCWE-1333CWE-1333
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| crmne ruby_llm | No range specified | — |
| Ruby | 3.1.x | — |
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