Vulnerability · Published Oct 27, 2026 · Assigned by GitHub_M

CVE-2026-116674systeminformation: Prototype pollution in `networkStats()` via the interface name

Medium 6.5

In plain English

A medium-severity prototype pollution in systeminformation from sebhildebrandt. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 21% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)6.5Medium

Exploit odds (30 days)0.3%top 78.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

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 packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Debian:14	node-systeminformation	no fix listed	DEBIAN-CVE-2026-116674
Ubuntu:26.10	node-systeminformation	no fix listed	UBUNTU-CVE-2026-116674
npm	systeminformation	5.33.13	GHSA-7648-jmwf-vw7j

Affected products (as reported)

Vendor	Product	Versions
sebhildebrandt	systeminformation	< 5.33.13

Weakness: CWE-1321 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:L

References

https://github.com/sebhildebrandt/systeminformation/security/advisories/GHSA-7648-jmwf-vw7j x_refsource_CONFIRM
https://github.com/sebhildebrandt/systeminformation/commit/6ff25a1ebc0b1fdc7a8aa3507e46f22007da2969 x_refsource_MISC
https://github.com/sebhildebrandt/systeminformation/releases/tag/v5.33.13 x_refsource_MISC