CVE-2026-116674
systeminformation: Prototype pollution in `networkStats()` via the interface name
systeminformation is a System and OS information library for node.js. Prior to 5.33.13, networkStats(ifaces) in lib/network.js on FreeBSD, OpenBSD, and NetBSD stores per-interface data in the plain-object _network cache and indexes it with the sanitized caller-controlled interface name. Passing proto causes the inherited Object.prototype value to be used instead of creating an own cache entry, so calcNetworkSpeed() writes rx_bytes, tx_bytes, rx_sec, tx_sec, ms, last_ms, and operstate onto Object.prototype. The polluted property names are fixed and their values come from interface statistics, but inherited-name collisions and enumerable keys can corrupt application branching, serialization, configuration merging, validation, or lookup behavior. This issue is fixed in version 5.33.13.
- Affected
- sebhildebrandt · systeminformation
- CVSS v3.1 GITHUB
- 6.5 MEDIUM
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:L - EPSS
- 0.29% chance of exploitation in the next 30 days, 21st percentile
- Published
- 2026-10-27
Proof-of-concept exploits (1)
CVE references
- sebhildebrandt/systeminformation/commit/6ff25a1ebc0b1fdc7a8aa3507e46f22007da2969REFERENCE
- sebhildebrandt/systeminformation/releases/tag/v5.33.13REFERENCE
- sebhildebrandt/systeminformation/security/advisories/GHSA-7648-jmwf-vw7jREFERENCE