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Polynomial-Time Regular Expression Denial of Service (ReDoS) vulnerability

🗓️ 13 Aug 2026 00:00:00Reported by RubySecType 
rubygems
 rubygems
🔗 rubysec.com👁 8 Views

ReDoS in ruby_llm RubyLLM::Utils.underscore on Ruby 3.1.x via long class, agent, or tool names.

Related
Detection
Refs
ReporterTitlePublishedViews
Family
attackerkb
attackerkb
CVE-2026-67991
13 Aug 202600:00
–attackerkb
circl
Circl
CVE-2026-67991
13 Aug 202604:41
–circl
cve
CVE
CVE-2026-67991
13 Aug 202600:00
–cve
cvelist
Cvelist
CVE-2026-67991
13 Aug 202600:00
–cvelist
euvd
EUVD
EUVD-2026-58032
13 Aug 202600:00
–euvd
nvd
NVD
CVE-2026-67991
13 Aug 202614:17
–nvd
ptsecurity
Positive Technologies
PT-2026-71597
13 Aug 202600:00
–ptsecurity
rapid7
Rapid7 Vulnerability Database (full)
CVE-2026-67991: Inefficient Regular Expression Complexity
13 Aug 202600:00
–rapid7
vulnrichment
Vulnrichment
CVE-2026-67991
13 Aug 202600:00
–vulnrichment
Vulners
Node
rubyruby_llmRange≤2.0.0.1

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13 Aug 2026 00:00Current
5.6Medium risk
Vulners AI Score5.6
CVSS 3.17.5
EPSS0.00508
SSVC
8