Rollbar.js Prototype Pollution Vulnerability in merge()
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- —
- Confidentiality · integrity · availability
- None · High · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub.
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.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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| rollbar | rollbar.js | before 2.26.5; 3.0.0-alpha1 to before 3.0.0-beta5 | 2.26.5, 3.0.0-beta5 | Patch available | CNA |
| — | rollbar (npm) | before 2.26.5 | 2.26.5 | Patch available | GHSA-xcg2-9pp4-j82x |
| — | rollbar (npm) | 3.0.0-alpha1 to before 3.0.0-beta5 | 3.0.0-beta5 | Patch available | GHSA-xcg2-9pp4-j82x |
- rollbar.js Vendorrollbar Affected before 2.26.5; 3.0.0-alpha1 to before 3.0.0-beta5 Fixed in 2.26.5, 3.0.0-beta5 Patch available CNA
- rollbar (npm) Vendor— Affected before 2.26.5 Fixed in 2.26.5 Patch available GHSA-xcg2-9pp4-j82x
- rollbar (npm) Vendor— Affected 3.0.0-alpha1 to before 3.0.0-beta5 Fixed in 3.0.0-beta5 Patch available GHSA-xcg2-9pp4-j82x
Remediation
- Fix · CNA rollbar.js (rollbar) Fixed in 2.26.5, 3.0.0-beta5
- Fix · GHSA-xcg2-9pp4-j82x rollbar (npm) Fixed in 2.26.5 Advisory →
- Fix · GHSA-xcg2-9pp4-j82x rollbar (npm) Fixed in 3.0.0-beta5 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2025-62517
- 2026-10-03 Alias added: GHSA-xcg2-9pp4-j82x
References
Other 6
- https://github.com/rollbar/rollbar.js/security/advisories/GHSA-xcg2-9pp4-j82x
- https://github.com/rollbar/rollbar.js/pull/1390
- https://github.com/rollbar/rollbar.js/pull/1394
- https://github.com/rollbar/rollbar.js/commit/61032fe6c208b71e249514800808a54bcb8cb8bb
- https://github.com/rollbar/rollbar.js/commit/d717def8b68f4a947975d0aebb729869cdb2d343
- https://github.com/rollbar/rollbar.js
More rollbar vulnerabilities
- TI-2025-35511 rollbar is a package designed to effortlessly track and debug errors in JavaScript… CVSS 3.1HIGH 7.5
- TI-2025-23347 WordPress Rollbar plugin <= 2.7.1 - Cross Site Request Forgery (CSRF) vulnerability CVSS 3.1MEDIUM 5.4
Sources
- CVE-2025-62517 · CVE Program
- CVE-2025-62517 · NVD
- FIRST EPSS
- GHSA-xcg2-9pp4-j82x · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences