{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-105221 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-105221 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-105221 is a critical vulnerability in defunkt gist, published on 4 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-105221 and fix it if it is affected.\n\nWhat it is: CVE-2026-105221 is a critical vulnerability in defunkt gist, published on 4 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-105221 in the wild and no public exploit code.\n\nAffected product: defunkt gist. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-105221/ (Markdown: https://insights.sbomify.com/CVE-2026-105221/index.md)","id":"CVE-2026-105221","markdown":"https://insights.sbomify.com/CVE-2026-105221/index.md","name":"CVE-2026-105221","record":{"aliases":["GHSA-phqh-xp3p-h6mr","UBUNTU-CVE-2026-105221"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["data_read","data_modify"],"network_reachable":"yes","non_default_config":false,"product_category":"Ruby gem","requires_auth":"none","summary":"An on-path attacker can intercept HTTPS traffic to steal OAuth tokens and credentials by exploiting disabled TLS certificate verification in the Gist RubyGem.","user_interaction":"not_required","vuln_class":"weak_cryptography"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[],"cvss":{"score":9.1,"severity":"critical","source":"cna","vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-295","name":"Improper Certificate Validation"}],"description":"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.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":"2026-10-06","github_poc":1,"max_poc_stars":0,"metasploit":0,"nuclei":0,"refs":[{"date":"2026-10-06T01:44:21Z","kind":"github_poc","ref":"https://github.com/abraxas/cve-2026-105221-gist-tls","stars":0,"title":"CVE-2026-105221 - gist RubyGem - High - MITM - GitHub OAuth token theft"}],"tier":"poc_unverified"},"has_fix":false,"headline":"Gist RubyGem before 6.1.0 Disabled TLS Certificate Verification","id":"CVE-2026-105221","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"weak_cryptography","year":"2026"},"n_packages":0,"n_references":5,"next":{"headline":"alexpechkarev/google-maps through 12.16 Disabled TLS Certificate Verification via ssl_verify_peer","id":"CVE-2026-105222"},"packages":[],"prev":{"headline":"Twine 2 Desktop through 2.12.0 Arbitrary Code Execution via Imported Story Files","id":"CVE-2026-105220"},"products":["gist"],"published":"2026-10-04","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"},{"class":"open","licence":"CC0","name":"PoC-in-GitHub"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-10-05","vendors":["defunkt"]},"summary":"An on-path attacker can intercept HTTPS traffic to steal OAuth tokens and credentials by exploiting disabled TLS certificate verification in the Gist RubyGem.","url":"https://insights.sbomify.com/CVE-2026-105221/"}