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EUVD-2026-256751

fkie_cve-2025-62517

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.

GHSA-xcg2-9pp4-j82x — rollbar vulnerable to Prototype Pollution in merge()

Affected: npm: rollbar

### Impact

Prototype pollution vulnerability in merge(). If application code calls `rollbar.configure()` with untrusted input, prototype pollution is possible.

### Patches

Fixed in 2.26.5 and 3.0.0-beta5.

### Workarounds

Ensure that values passed to `rollbar.configure()` do not contain untrusted input.

### References

Fixed in https://github.com/rollbar/rollbar.js/pull/1394 (2.26.x) and https://github.com/rollbar/rollbar.js/pull/1390 (3.x)