CVE-2026-44580
Description
A flaw was found in Next.js. A remote attacker could exploit this cross-site scripting (XSS) vulnerability by injecting untrusted content into beforeInteractive scripts. Due to improper escaping of serialized script content, this could allow the attacker to execute arbitrary JavaScript code in a visitor's browser, leading to information disclosure or unauthorized actions.
Statement
This is a Moderate cross-site scripting (XSS) vulnerability affecting Next.js applications. The flaw occurs when applications employ beforeInteractive scripts with unsanitized, untrusted content, enabling remote attackers to execute arbitrary JavaScript. The requirement for this specific script strategy and attacker-controlled input limits the overall exposure in Red Hat deployments.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 6.1 | N/A | 6.1 |
| Attack Vector | Network | N/A | Network |
| Attack Complexity | Low | N/A | Low |
| Privileges Required | None | N/A | None |
| User Interaction | Required | N/A | Required |
| Scope | Changed | N/A | Changed |
| Confidentiality | Low | N/A | Low |
| Integrity Impact | Low | N/A | Low |
| Availability Impact | None | N/A | None |
Vector
Red Hat: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
cve.org: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
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