Meteor Affected By Inefficient Regular Expression Complexity
A vulnerability was found in Meteor up to 3.2.1 and classified as problematic. This issue affects the function Object.assign of the file packages/ddp-server/livedata_server.js. The manipulation of the argument forwardedFor leads to inefficient regular expression complexity. The attack may be initiated remotely. The complexity of an attack is rather high. The exploitation is known to be difficult. The exploit has been disclosed to the public and may be used. Upgrading to version 3.2.2 is able to address this issue. The identifier of the patch is f7ea6817b90952baaea9baace2a3b4366fee6a63. It is recommended to upgrade the affected component.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | meteor | <= 3.2.1 | no fix |
References
- https://nvd.nist.gov/vuln/detail/CVE-2025-4727
- https://github.com/meteor/meteor/issues/13713
- https://github.com/meteor/meteor/pull/13721
- https://github.com/meteor/meteor/commit/f7ea6817b90952baaea9baace2a3b4366fee6a63
- https://github.com/meteor/meteor
- https://github.com/meteor/meteor/releases/tag/release/METEOR%403.2.2
- https://vuldb.com/?ctiid.309029
- https://vuldb.com/?id.309029
- https://vuldb.com/?submit.570441
- CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L- Weakness (CWE)
CWE-400- Platform
- npm
- Package
meteor- Disclosed
- 16.05.2025
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-j3v9-6gc7-vf5f - CC BY 4.0
Vulnerability history: meteor
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
This is the only known vulnerability of this package.
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