CVE-2026-27787 Cross-site scripting in MATCHA SNS
An attacker can execute arbitrary scripts in the browser of users accessing the MATCHA SNS web application.
- 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-2026-27787?
CVE-2026-27787 is a medium-severity cross-site scripting vulnerability in ICZ Corporation MATCHA SNS, published on 8 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
Cross-site scripting vulnerability exists in MATCHA SNS 1.3.9 and earlier. If this vulnerability is exploited, an arbitrary script may be executed on the web browser of the user who accessed the website using the product.
Weakness: CWE-79
Which versions are affected by CVE-2026-27787?
It affects 1 product.
Products include Icz Matcha Sns.
How do I fix CVE-2026-27787?
No fix has been published for CVE-2026-27787 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-2026-27787 being exploited?
There is no known exploitation of CVE-2026-27787 in the wild and no public exploit code.
Sources
Also known as GHSA-wm9p-h6hw-5vx8.