CVE-2026-67987
crmne/ruby_llm at commit fa6f279847d6d7027814539d9c0dfc3bbdfd2a83 contains polynomial-time regular expression denial-of-service conditions in think-tag response parsing on Ruby 3.1.x. A malicious or anomalous model response containing many unterminated <think> tags can cause excessive CPU consumption in two consecutive regular expressions and delay chat-completion processing
- Published Sep 29, 2026
- CVSS 7.5 high
- 0.4% chance of exploitation in the next 30 days (EPSS)
- A fix is available