CVE-2026-105221Gist RubyGem before 6.1.0 Disabled TLS Certificate Verification
Updated under an hour ago ()
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It affects defunkt gist. Add what you run to find out whether that includes you.
EPSS puts the chance of exploitation in the next 30 days at 0.18%, higher than 7% of scored CVEs.
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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
- 7.4 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
- Weakness (CWE)
- CWE-295
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- 0.18% (percentile 7)
- Assigned by
- VulnCheck
- NVD analysis
- Deferred
- Record last updated
- Oct 5, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
defunkt gist defunkt:gist (from the name) | from 4.0.0 before 6.1.0 | CNA record |
References
- https://github.com/defunkt/gist/issues/373issue-tracking
- https://github.com/defunkt/gistproduct
- https://github.com/defunkt/gist/blob/v6.0.0/lib/gist.rb#L466-L468technical-description
- https://github.com/defunkt/gist/commit/07ccc1a6d46e9d36f0e85d0b1c5d795890ae6bcfpatch
- https://www.vulncheck.com/advisories/gist-rubygem-before-6.1.0-disabled-tls-certificate-verificationthird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.