CVE-2026-25847 Cross-site scripting in PyCharm

High 8.2 Published 9 Feb 2026 Updated 26 Feb 2026

An attacker can execute arbitrary scripts in the Jupyter viewer page of JetBrains PyCharm, potentially compromising user data or session integrity.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2026-25847?

CVE-2026-25847 is a high-severity cross-site scripting vulnerability in JetBrains PyCharm, published on 9 Feb 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

In JetBrains PyCharm before 2025.3.2 a DOM-based XSS on Jupyter viewer page was possible

Weakness: CWE-79

Which versions are affected by CVE-2026-25847?

It affects 1 product.

Products include Jetbrains Pycharm.

How do I fix CVE-2026-25847?

No fix has been published for CVE-2026-25847 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-2026-25847 being exploited?

There is no known exploitation of CVE-2026-25847 in the wild and no public exploit code.

Sources

Also known as GHSA-rhp6-v5v3-v7p4.