CVE-2026-111662

Chaskiq through 2.0.3 contains a server-side request forgery vulnerability that allows unauthenticated attackers to make the server fetch arbitrary URLs via the url parameter of the /oembed endpoint. Attackers can target loopback, private, or cloud-metadata addresses through FetchLinkCardService, which follows redirects and skips TLS verification, to read internal page titles and descriptions.

• https://github.com/chaskiq/chaskiq/blob/2.0.3/app/controllers/oembed_controller.rb#L8-L11
• https://github.com/chaskiq/chaskiq/blob/2.0.3/app/services/fetch_link_card_service.rb#L11-L40

• https://github.com/chaskiq/chaskiq/blob/2.0.3/app/controllers/oembed_controller.rb#L8-L11
• https://github.com/chaskiq/chaskiq/blob/2.0.3/app/services/fetch_link_card_service.rb#L11-L40
• https://hackmd.io/@hieuPenguinnn/chaskiq-unauthenticated-ssrf-oembed-url-upload
• https://www.vulncheck.com/advisories/chaskiq-through-2.0.3-unauthenticated-ssrf-via-oembed-endpoint
• https://hackmd.io/@hieuPenguinnn/chaskiq-unauthenticated-ssrf-oembed-url-upload

• HIGHCVE-2020-37278PoC
• HIGHCVE-2023-54402PoC
• MEDIUMCVE-2024-34319
• UNSCOREDCVE-2026-0311
• LOWCVE-2026-100104
• MEDIUMCVE-2026-100251
• MEDIUMCVE-2026-100257
• MEDIUMCVE-2026-100279

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