What is CVE-2025-25977?

CVE-2025-25977 is a critical-severity vulnerability in Canvg, classified under Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution). CVSS score: 9.8/10. Published 2025-03-10.

How severe is CVE-2025-25977?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Prototype Pollution in Canvg

CVE-2025-25977

An issue in canvg v.4.0.2 allows an attacker to execute arbitrary code via the Constructor of the class StyleElement.

Vulnerability class: Prototype Pollution

EPSS: 0.006 (45.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Canvg
N/a — versions n/a

Weakness classification (CWE)

CWE-1321 — Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution)

References

cve@mitre.org (Exploit, Issue Tracking)

Frequently asked questions

What is CVE-2025-25977?: CVE-2025-25977 is a critical-severity vulnerability in Canvg, classified under Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution). CVSS score: 9.8/10. Published 2025-03-10.
How severe is CVE-2025-25977?: Critical severity. CVSS v3 base score is 9.8 out of 10.