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An issue was discovered in RDoc 6.3.3 through 6.6.2 as distributed in Ruby 3.x through 3.3.0. When parsing .rdoc_options (used for configuration in RDoc) as a YAML file object injection and resultant remote code execution are possible because there are no restrictions on the classes that can be restored. (When loading the documentation cache object injection and resultant remote code execution are also possible if there were a crafted cache.) The main fixed version is 6.6.3.1. For Ruby 3.0 users a fixed version is rdoc 6.3.4.1. For Ruby 3.1 users a fixed version is rdoc 6.4.1.1. For Ruby 3.2 users a fixed version is rdoc 6.5.1.1.

🗓️ 14 May 2024 07:00:00Reported by MicrosoftType 
mscve
 mscve
🔗 msrc.microsoft.com👁 2 Views

RDoc YAML injection in rdoc_options or cache enables remote code execution; upgrade to the fixed versions.

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21 Feb 2026 08:22Current
9.3High risk
Vulners AI Score9.3
CVSS 3.14.5
EPSS0.02433
SSVC
2