CVE-2026-73231
Description
A flaw was found in Faker, a library for generating fake data. The faker.helpers.fake method allows an attacker to control fake templates, which can then access the Function constructor. This access, specifically through fakeEval.resolveProperty when a function returns another function, enables arbitrary JavaScript code execution. This could allow an attacker to run malicious code within the application.
Statement
Red Hat products ship @faker-js/faker as a bundled dependency. Faker is typically used for test data generation rather than in production code paths, which limits the practical attack surface. However, if attacker-controlled input reaches the faker.helpers.fake() method, arbitrary code execution is possible. Upgrade to @faker-js/faker version 10.5.0 or later.
Mitigation
Do not pass untrusted or user-controlled input to the faker.helpers.fake() method. If Faker is only used for testing, ensure it is not included in production builds. Upgrading to @faker-js/faker version 10.5.0 resolves the underlying code injection vulnerability.
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 | 8.8 | N/A | 7.8 |
| Attack Vector | Network | N/A | Local |
| Attack Complexity | Low | N/A | Low |
| Privileges Required | Low | N/A | Low |
| User Interaction | None | N/A | None |
| Scope | Unchanged | N/A | Unchanged |
| Confidentiality | High | N/A | High |
| Integrity Impact | High | N/A | High |
| Availability Impact | High | N/A | High |
Vector
Red Hat: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
cve.org: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Understanding the Weakness (CWE)
Access Control
Technical Impact: Bypass Protection Mechanism
In some cases, injectable code controls authentication; this may lead to a remote vulnerability.
Access Control
Technical Impact: Gain Privileges or Assume Identity
Injected code can access resources that the attacker is directly prevented from accessing.
Integrity,Confidentiality,Availability
Technical Impact: Execute Unauthorized Code or Commands
When a product allows a user's input to contain code syntax, it might be possible for an attacker to craft the code in such a way that it will alter the intended control flow of the product. As a result, code injection can often result in the execution of arbitrary code. Code injection attacks can also lead to loss of data integrity in nearly all cases, since the control-plane data injected is always incidental to data recall or writing.
Non-Repudiation
Technical Impact: Hide Activities
Often the actions performed by injected control code are unlogged.
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