🛡️ CVE-2026-34077 on npm (Root.io) — react-router

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

Description

CVE-2026-34077 in react-router - Patched by Root

Root has patched CVE-2026-34077 in the react-router package for Root:npm. Multiple fixed versions available.

Distribution advisory

This page covers CVE-2026-34077 as tracked by npm (Root.io), for the package react-router. The fix is available in version 7.12.0-root.io.3; 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 none, availability high. (rating taken from the base CVE record.)

Weakness class

ROOT-APP-NPM-CVE-2026-34077 is classified as CWE-770: Allocation of Resources Without Limits. Resources are allocated on request with no cap, so a client can exhaust them.

Affected software

ROOT-APP-NPM-CVE-2026-34077 is recorded against 2 packages.

  • @rootio/react-router (fixed in 7.12.0-root.io.3)
  • react-router (fixed in 7.12.0-aikido.3)

Timeline and source

Published on 4 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 2026-08-04
Updated 2026-08-12
Modified 2026-08-04
Fix URL N/A

Affected Packages

Software From version Fixed in
@rootio/react-router — 7.12.0-root.io.3
react-router — 7.12.0-aikido.3

References

N/A

Site Security Check

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