CVE-2026-73827 Cross-site scripting in SOY Calendar
An attacker can execute arbitrary scripts in the browser of a logged-in user via a cross-site scripting vulnerability in SOY Calendar.
- 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-2026-73827?
CVE-2026-73827 is a medium-severity cross-site scripting vulnerability in Tsuyoshi Saito SOY Calendar, published on 28 Aug 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
SOY Calendar contains a cross-site scripting vulnerability. An arbitrary script may be executed on the web browser of the user who is logging in to the product.
Weakness: CWE-79
Which versions are affected by CVE-2026-73827?
How do I fix CVE-2026-73827?
No fix has been published for CVE-2026-73827 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-2026-73827 being exploited?
There is no known exploitation of CVE-2026-73827 in the wild and no public exploit code.
Sources
Also known as GHSA-p9g2-m7rg-67r7.