Description
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: 2026-09-29
Score: 7.5 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

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History

Thu, 01 Oct 2026 19:45:00 +0000

Type Values Removed Values Added
Title Ruby LLM Regular Expression Denial‑of‑Service in Think‑Tag Parsing
Weaknesses CWE-20
CWE-770

Thu, 01 Oct 2026 17:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 01 Oct 2026 16:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-1333
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}


Wed, 30 Sep 2026 11:30:00 +0000

Type Values Removed Values Added
Title Ruby LLM Regular Expression Denial‑of‑Service in Think‑Tag Parsing
Weaknesses CWE-20
CWE-770

Tue, 29 Sep 2026 20:00:00 +0000

Type Values Removed Values Added
Description 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
References

Subscriptions

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cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-10-01T15:22:56.624Z

Reserved: 2026-07-30T00:00:00.000Z

Link: CVE-2026-67987

cve-icon Vulnrichment

Updated: 2026-10-01T15:22:49.011Z

cve-icon NVD

Status : Deferred

Published: 2026-09-29T20:17:22.970

Modified: 2026-10-01T16:17:47.723

Link: CVE-2026-67987

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-01T19:30:11Z

Weaknesses
  • CWE-1333

    Inefficient Regular Expression Complexity