Prototype pollution in Rollbar.js - CVE-2025-62517
Published: April 24, 2026
Vulnerability identifier: #VU127494
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2025-62517
CWE-ID: CWE-1321
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Rollbar
Affected software:
Rollbar.js
Rollbar.js
Detailed vulnerability description
The vulnerability allows a remote attacker to modify object prototype attributes.
The vulnerability exists due to improperly controlled modification of object prototype attributes in merge() when rollbar.configure() processes untrusted input. A remote attacker can supply crafted input to modify object prototype attributes.
How to mitigate CVE-2025-62517
Install security update from vendor's website.