CVE-2026-84204 GROWI through 8.0.2 Missing Authorization on apiv3 Attachment Retrieval
Authenticated attackers can retrieve attachment metadata from restricted pages by bypassing page access permission checks in the API.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-84204?
CVE-2026-84204 is a high-severity missing authorization vulnerability in growilabs growi, published on 1 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
GROWI contains an access control vulnerability in the GET /_api/v3/attachment/:id endpoint that fails to validate page access permissions. Authenticated attackers can retrieve attachment metadata from pages they cannot view by supplying known attachment identifiers.
Weakness: CWE-862
Which versions are affected by CVE-2026-84204?
How do I fix CVE-2026-84204?
No fix has been published for CVE-2026-84204 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-84204 being exploited?
There is no known exploitation of CVE-2026-84204 in the wild and no public exploit code.
Sources
Also known as GHSA-vphg-3vmw-2vv6.