---
id: CVE-2025-62517
title: Rollbar.js offers error tracking and logging from Javascript to Rollbar
summary: >-
  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.co…
severity: medium
cvss: 5.9
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N'
cwe:
  - CWE-1321
published: '2025-10-23'
updated: '2026-10-08'
sourceUpdated: '2026-10-08T11:10:00.250'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-62517'
references:
  - url: >-
      https://github.com/rollbar/rollbar.js/commit/61032fe6c208b71e249514800808a54bcb8cb8bb
    label: security-advisories@github.com
  - url: >-
      https://github.com/rollbar/rollbar.js/commit/d717def8b68f4a947975d0aebb729869cdb2d343
    label: security-advisories@github.com
  - url: 'https://github.com/rollbar/rollbar.js/pull/1390'
    label: security-advisories@github.com
  - url: 'https://github.com/rollbar/rollbar.js/pull/1394'
    label: security-advisories@github.com
  - url: >-
      https://github.com/rollbar/rollbar.js/security/advisories/GHSA-xcg2-9pp4-j82x
    label: security-advisories@github.com
tags:
  - nvd
epss: 0.00393
epssPercentile: 0.31302
ingestedAt: '2026-10-08T11:31:27.563Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.