CVE-2026-78213 Hepta Platforms｜Heptabase - Stored Cross-Site Scripting
Authenticated attackers can inject persistent malicious scripts into Heptabase pages, leading to arbitrary JavaScript execution for other users.
- 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-2026-78213?
CVE-2026-78213 is a medium-severity cross-site scripting vulnerability in Heptabase, published on 24 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
Heptabase developed by Hepta Platforms, Inc. has a Stored Cross-Site Scripting vulnerability. Authenticated remote attackers can inject persistent malicious content into specific pages, causing arbitrary JavaScript code to execute when other users click the crafted content.
Weakness: CWE-79
Which versions are affected by CVE-2026-78213?
How do I fix CVE-2026-78213?
No fix has been published for CVE-2026-78213 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-2026-78213 being exploited?
There is no known exploitation of CVE-2026-78213 in the wild and no public exploit code.
Sources
Also known as GHSA-vj8r-qh6m-h2x7.