🛡️ CVE-2026-16221 on npm (Root.io) — fast-uri

🟠 CVSS 8.0 — High ✅ No Known Exploit OSV
8.0
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

CVE-2026-16221 in fast-uri - Patched by Root

Root has patched CVE-2026-16221 in the fast-uri package for Root:npm. Multiple fixed versions available.

Distribution advisory

This page covers CVE-2026-16221 as tracked by npm (Root.io), for the package fast-uri. The fix is available in version 3.1.0+aikido.4; earlier versions remain affected.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity high, availability none. (rating taken from the base CVE record.)

Weakness class

ROOT-APP-NPM-CVE-2026-16221 is classified as CWE-436: Interpretation Conflict. Two components parse the same data differently, so a check in one is bypassed in the other.

Affected software

ROOT-APP-NPM-CVE-2026-16221 is recorded against 2 packages.

  • @rootio/fast-uri (fixed in 3.1.0+aikido.4)
  • fast-uri (fixed in 3.1.0+aikido.4)

Timeline and source

Published on 5 August 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

Details

Severity HIGH
CVSS Score 8.0
CVSS Vector N/A
CWE N/A
Public Exploit ✅ No
Source OSV
Published 2026-08-05
Updated 2026-08-12
Modified 2026-08-05
Fix URL N/A

Affected Packages

Software From version Fixed in
@rootio/fast-uri — 3.1.0+aikido.4
fast-uri — 3.1.0+aikido.4

References

N/A

Site Security Check

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