CVE-2026-26291 Cross-site scripting in GROWI
An attacker can inject arbitrary scripts into GROWI wiki pages, leading to code execution in victims' browsers.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-26291?
CVE-2026-26291 is a medium-severity cross-site scripting vulnerability in GROWI, Inc. GROWI, published on 15 Apr 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
Stored cross-site scripting vulnerability exists in GROWI v7.4.6 and earlier. If this vulnerability is exploited, an arbitrary script may be executed in a user's web browser.
Weakness: CWE-79
Which versions are affected by CVE-2026-26291?
How do I fix CVE-2026-26291?
No fix has been published for CVE-2026-26291 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-26291 being exploited?
There is no known exploitation of CVE-2026-26291 in the wild and no public exploit code.
Sources
Also known as GHSA-w2qc-5jvx-3g3v.