Medium 5.9Published Oct 23, 2025

CVE-2025-62517Rollbar.js Prototype Pollution Vulnerability in merge()

Updated under an hour ago (Oct 28, 2026, 3:10 AM ET)

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No exploitation reported and no EPSS estimate yet.

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Every CVE for rollbar.js

Exploited in the last 30 days

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.

CVSS: 5.9 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
Weakness (CWE): CWE-1321
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: Oct 23, 2025
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

rollbar rollbar.js rollbar:rollbar.js (from the name)	before 2.26.5; from 3.0.0-alpha1, < 3.0.0-beta5	CNA record

References

References

https://github.com/rollbar/rollbar.js/security/advisories/GHSA-xcg2-9pp4-j82x	x-refsource-confirm
https://github.com/rollbar/rollbar.js/pull/1390	x-refsource-misc
https://github.com/rollbar/rollbar.js/pull/1394	x-refsource-misc
https://github.com/rollbar/rollbar.js/commit/61032fe6c208b71e249514800808a54bcb8cb8bb	x-refsource-misc
https://github.com/rollbar/rollbar.js/commit/d717def8b68f4a947975d0aebb729869cdb2d343	x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.