CVE-2026-111663

Chaskiq through 2.0.3 contains a server-side request forgery vulnerability that allows unauthenticated attackers to fetch arbitrary URLs via the createUrlUpload GraphQL mutation. Attackers can submit internal URLs, including cloud instance metadata endpoints, through POST /graphql and retrieve the full response via the returned ActiveStorage blob URL.

Score

CVSS 4.0 9.2 Critical

Status

Deferred - disclosure@vulncheck.com

Published

2026-10-16

Last modified

2026-10-23

Weaknesses

CWE-918

Affected products

• Chaskiq (Chaskiq)

References

• https://hackmd.io/@hieuPenguinnn/chaskiq-unauthenticated-ssrf-oembed-url-upload
• https://github.com/chaskiq/chaskiq/blob/2.0.3/app/graphql/mutations/create_url_upload.rb#L29-L66
• https://github.com/chaskiq/chaskiq/blob/2.0.3/app/controllers/graphql_controller.rb#L3-L33
• https://www.vulncheck.com/advisories/chaskiq-through-2.0.3-ssrf-via-createurlupload-graphql-mutation