Cyber Resilience

CVE-2026-56698

MediumPublic PoC

Published: 22 June 2026

Published
22 June 2026
Modified
25 June 2026
KEV Added
—
Patch
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CVSS Score v4 5.3 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
EPSS Score 0.0023 14.2th percentile
Risk Priority 35 floored blend · peak EPSS

Summary

CVE-2026-56698 is a medium-severity Cross-site Scripting (CWE-79) vulnerability in Nuxt Nuxt. Its CVSS base score is 5.3 (Medium).

Operationally, exploitation aligns with the MITRE ATT&CK technique JavaScript (T1059.007); ranked at the 14.2th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

OWASP Top 10 for Web (2025)

A05:2025 Injection

EU & UK References

Vulnerability details

Nuxt versions 4.0.0 before 4.4.7 and 3.x before 3.21.7 fail to validate script-capable URLs in the navigateTo open option, allowing client-side script execution. Attackers can supply javascript: URLs through the open parameter to execute arbitrary scripts in the application's origin…

more

when user-controlled input is passed to navigateTo.

CWE(s)
CWE-79

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1059.007 JavaScript Execution
Adversaries may abuse various implementations of JavaScript for execution.
attack.mitre.org →
T1189 Drive-by Compromise Initial Access
Adversaries may gain access to a system through a user visiting a website over the normal course of browsing.
attack.mitre.org →
Why these techniques?

XSS via javascript: URLs directly enables arbitrary JS execution (T1059.007) and facilitates drive-by compromise when user input reaches navigateTo.

Confidence: MEDIUM · MITRE ATT&CK Enterprise v19.0

CVEs Like This One

CVE-2021-20279Shared CWE-79
CVE-2021-30212Shared CWE-79
CVE-2020-23049Shared CWE-79
CVE-2021-32702Shared CWE-79
CVE-2020-35563Shared CWE-79
CVE-2021-21667Shared CWE-79
CVE-2021-32792Shared CWE-79
CVE-2021-27945Shared CWE-79
CVE-2021-29105Shared CWE-79
CVE-2021-30689Shared CWE-79

Affected Assets

nuxt
nuxt
3.0.0 — 3.21.7 · 4.0.0 — 4.4.7

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

CA-8 Penetration Testing
addresses: CWE-79

Penetration testing submits XSS payloads to web applications, detecting cross-site scripting flaws for subsequent remediation.

SI-10 Information Input Validation
addresses: CWE-79

Validates web inputs to reject script-related content that could produce XSS.

SI-15 Information Output Filtering
addresses: CWE-79

Output validation against expected content can reject or sanitize script content in generated web pages, reducing XSS exploitability.

References