Corteza through 2024.9.10 Unauthenticated Attachment Access via Compose Attachment Endpoints

Advisories

Corteza through 2024.9.10 Unauthenticated Attachment Access via Compose Attachment Endpoints

severity: high
date: 10/11/2026
Affecting: corteza <= 2024.9.10
CVE: CVE-2026-108729
CWE: CWE-863 Incorrect Authorization
CVSS: 8.2
CVSS V4 Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
References: https://hackmd.io/@haind03/corteza-attachment-kind-confusion-unauth-read
https://github.com/cortezaproject/corteza/blob/3835dfc4ac8bd89381753f09042ad147a4502576/server/compose/rest/attachment.go#L79-L122
https://github.com/cortezaproject/corteza/blob/3835dfc4ac8bd89381753f09042ad147a4502576/server/compose/service/attachment.go#L123-L142
https://github.com/cortezaproject/corteza/commit/3b68aa30c7261f729fcf8202f3eab9cf7d9168d3
https://github.com/cortezaproject/corteza
Credit: HaiND from the Post and Telecommunication Institute of Technology
Description: Corteza through 2024.9.10 contains an incorrect authorization vulnerability in compose attachment endpoints that allows unauthenticated attackers to download private attachments by setting the URL kind segment to page, icon, or namespace. Attackers who know a private record or module attachment id can request the original or preview route without a token or signature to retrieve files across namespace and record permission boundaries.

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