CVE-2026-67989 crmne/ruby_llm - Denial of Service

crmne/ruby_llm contains a regular expression denial-of-service caused by polynomial-time regex in Mistral model capability matching on Ruby 3.1.x, letting attackers cause denial of service, exploit requires crafted input.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.34% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Denial of Service
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
2 October 2026
Updated
15 October 2026
Weakness
CWE-1333

Vendor fix

Update to the latest version with the fix applied.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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