CVE-2025-27793 Vega vulnerable to Cross-site Scripting via RegExp.prototype[@@replace]
Attackers can execute arbitrary JavaScript via crafted Vega JSON definitions, impacting applications rendering untrusted visualizations.
- 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
- Available
What is CVE-2025-27793?
CVE-2025-27793 is a medium-severity cross-site scripting vulnerability in vega, published on 27 Mar 2025. 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
Vega is a visualization grammar, a declarative format for creating, saving, and sharing interactive visualization designs. In Vega prior to version 5.32.0, corresponding to vega-functions prior to version 5.17.0, users running Vega/Vega-lite JSON definitions could run unexpected JavaScript code when drawing graphs, unless the library was used with the `vega-interpreter`. Vega version 5.32.0 and vega-functions version 5.17.0 fix the issue. As a workaround, use `vega` with expression interpreter.
Which versions are affected by CVE-2025-27793?
4 open source packages ship an affected version, including vega and vega-functions.
| Package | Affected | Fixed in |
|---|---|---|
vega npm | All versions | 5.32.0 |
vega npm | All versions | 5.32.0 |
vega-functions npm | All versions | 5.17.0 |
vega-functions npm | All versions | 5.17.0 |
How do I fix CVE-2025-27793?
Upgrade vega to 5.32.0 or later.
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-2025-27793 being exploited?
There is no known exploitation of CVE-2025-27793 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2025-27793, GHSA-963h-3v39-3pqf, UBUNTU-CVE-2025-27793.