crmne ruby_llm Think-Tag Response Parsing redos

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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4.1$0-$5k0.76-

Summaryinfo

A vulnerability was found in crmne ruby_llm. It has been declared as problematic. Affected by this vulnerability is an unknown functionality of the component Think-Tag Response Parsing. The manipulation results in redos. This vulnerability is cataloged as CVE-2026-67987. The attack may be launched remotely. There is no exploit available. It is best practice to apply a patch to resolve this issue.

Detailsinfo

A vulnerability was found in crmne ruby_llm (version now known). It has been classified as problematic. Affected is some unknown processing of the component Think-Tag Response Parsing. The manipulation with an unknown input leads to a redos vulnerability. CWE is classifying the issue as CWE-1333. The product uses a regular expression with an inefficient, possibly exponential worst-case computational complexity that consumes excessive CPU cycles. This is going to have an impact on availability. CVE summarizes:

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

The advisory is available at github.com. This vulnerability is traded as CVE-2026-67987 since 07/30/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1449.003 by the MITRE ATT&CK project.

Applying the patch fa6f279847d6d7027814539d9c0dfc3bbdfd2a83 is able to eliminate this problem.

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Productinfo

Type

Vendor

Name

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.1

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Redos
CWE: CWE-1333 / CWE-400 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔒

Patch: fa6f279847d6d7027814539d9c0dfc3bbdfd2a83

Timelineinfo

07/30/2026 CVE reserved
09/29/2026 +61 days Advisory disclosed
09/29/2026 +0 days VulDB entry created
09/29/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: github.com
Status: Confirmed

CVE: CVE-2026-67987 (🔒)
GCVE (CVE): GCVE-0-2026-67987
GCVE (VulDB): GCVE-100-411774

Entryinfo

Created: 09/29/2026 22:17
Changes: 09/29/2026 22:17 (55)
Complete: 🔍
Cache ID: 216::103

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