Description
Rollbar.js offers error tracking and logging from Javascript to Rollbar. In versions before 2.26.5 and from 3.0.0-alpha1 to before 3.0.0-beta5, there is a prototype pollution vulnerability in merge(). If application code calls rollbar.configure() with untrusted input, prototype pollution is possible. This issue has been fixed in versions 2.26.5 and 3.0.0-beta5. A workaround involves ensuring that values passed to rollbar.configure() do not contain untrusted input.
Scores
CVSS v3
5.9
EPSS
0.0005
EPSS Percentile
15.1%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-1321
Status
published
Products (3)
npm/rollbar
0 - 2.26.5npm
rollbar/rollbar.js
< 2.26.5
rollbar/rollbar.js
>= 3.0.0-alpha1, < 3.0.0-beta5
Published
Oct 23, 2025
Tracked Since
Feb 18, 2026