CVE-2025-25977 canvg Prototype Pollution vulnerability
An attacker can execute arbitrary code via the StyleElement constructor in the canvg JavaScript library.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-25977?
CVE-2025-25977 is a critical code injection vulnerability in n/a, published on 10 Mar 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An issue in canvg v.4.0.2 allows an attacker to execute arbitrary code via the Constructor of the class StyleElement.
Weakness: CWE-1321
Which versions are affected by CVE-2025-25977?
4 open source packages ship an affected version, including canvg. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
canvg npm | All versions | 3.0.11 |
canvg npm | All versions | 3.0.11 |
canvg npm | From 4.0.0 | 4.0.3 |
canvg npm | From 4.0.0 | 4.0.3 |
Products include Canvg Canvg.
How do I fix CVE-2025-25977?
Upgrade canvg to a fixed version for your release line: 3.0.11 or 4.0.3.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2025-25977 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-25977 exists.
Sources
Also known as DEBIAN-CVE-2025-25977, GHSA-v2mw-5mch-w8c5, UBUNTU-CVE-2025-25977.