CVE-2026-105221

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.

CVSS v3 7.4 HIGH

7.4^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.2 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/defunkt/gist
https://github.com/defunkt/gist/blob/v6.0.0/lib/gist.rb#L466-L468
https://github.com/defunkt/gist/commit/07ccc1a6d46e9d36f0e85d0b1c5d795890ae6bcf
https://github.com/defunkt/gist/issues/373
https://www.vulncheck.com/advisories/gist-rubygem-before-6.1.0-disabled-tls-certificate-verification

Configurations

No configuration.

History

04 Oct 2026, 23:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-04 23:16

Updated : 2026-10-06 16:08

NVD link : CVE-2026-105221

Mitre link : CVE-2026-105221

CVE.ORG link : CVE-2026-105221

JSON object : View

Products Affected

No product.

CWE

CWE-295

Improper Certificate Validation

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