# CVE-2026-100727: GROWI improper access control in file upload

Source: https://junglewise.ai/threats/cve-2026-100727-an-improper-access-control-vulnerability-exists-in-growi-which  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-05. Updated: 2026-10-05  
License: CC BY 4.0 with a link back

CVE-2026-100727 · Severity: medium · CVSS 5.3 · Published 2026-10-05

GROWI is a collaborative wiki platform used to document and share organizational knowledge. An improper access control vulnerability allows unauthenticated attackers to read files stored in non-public pages when the file upload feature is configured to store files locally, exposing sensitive information that should have been restricted.

Vendors: [GROWI, Inc.](https://junglewise.ai/threats/vendors/growi-inc).

## Quick answers

**Is CVE-2026-100727 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-100727 being exploited in the wild.

**How severe is CVE-2026-100727?** Medium severity, with a CVSS score of 5.3, published 5 October 2026.

**Which products and versions are affected?** GROWI, Inc. GROWI prior to v7.5.5.

**Is there a fix for CVE-2026-100727?** Yes: fixed in GROWI v7.5.5. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-100727 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-100727?** Check whether you run GROWI or Inc. GROWI at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in GROWI v7.5.5

## Technical details

GROWI contains a CWE-552 (Files or Directories Accessible to External Parties) vulnerability in its file handling logic. When local file upload storage is configured, an unauthenticated attacker can access files in non-public pages without proper authorization checks. The vulnerability requires network access and affects versions prior to v7.5.5.

## Affected products

- GROWI, Inc. GROWI prior to v7.5.5

## Timeline

- 2026-10-05: disclosed

## References

- [https://growi.co.jp/news/47](https://growi.co.jp/news/47)
- [https://jvn.jp/en/jp/JVN24352487/](https://jvn.jp/en/jp/JVN24352487/)