NVD HIGH: CVE-2026-105221 — The gist RubyGem before 6.1.0 contains an improper certificate validation vulner...

Sunday, October 4, 2026 at 11:16 PM UTC·Source: NIST NVD

Updated: Monday, October 5, 2026 at 07:00 PM UTC

Executive Summary

The gist RubyGem before 6.1.0 contains an improper certificate validation vulnerability that allows on-path attackers to intercept HTTPS traffic because http_connection in lib/gist.rb sets VERIFY_NONE. Attackers can present any certificate to read or modify GitHub API traffic, stealing OAuth tokens and login credentials to read and modify the victim's gists.

Analysis

Indicators of Compromise (1)

CVE (1)

CVE-2026-105221

NVD MITRE CVE

Source Attribution

Originally published by NIST NVD on Oct 4, 2026. Verified by: NIST.

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