CVE-2026-22028
Description
A flaw was found in Preact, a lightweight web development framework. A security regression allows an attacker to bypass JSON serialization protection, leading to HTML injection. This vulnerability arises when applications process unsanitized data from external sources, allowing malicious JSON to be interpreted as valid user interface elements. If exploited, this could enable arbitrary script execution, potentially compromising user data or system integrity.
Statement
This vulnerability is rated Moderate for Red Hat because it requires applications to process unsanitized, user-modifiable JSON data directly into the render tree, assuming it to be strings. This specific configuration is not common in Red Hat products by default. Red Hat AMQ, Red Hat Ansible Automation Platform, OpenShift Lightspeed, OpenShift Container Platform, Red Hat Enterprise Linux, Red Hat In-Vehicle OS, Red Hat OpenShift AI (RHOAI), Ansible Services, Hosted OpenShift, and cloud.redhat.com are affected if they meet the described conditions.
Mitigation
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
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).
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 6.1 | 6.1 | N/A |
| Attack Vector | Network | Network | N/A |
| Attack Complexity | Low | Low | N/A |
| Privileges Required | None | None | N/A |
| User Interaction | Required | Required | N/A |
| Scope | Changed | Changed | N/A |
| Confidentiality | Low | Low | N/A |
| Integrity Impact | Low | Low | N/A |
| Availability Impact | None | None | N/A |
Vector
Red Hat: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
NVD: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Understanding the Weakness (CWE)
Availability,Integrity,Confidentiality
Technical Impact: Read Memory; Modify Memory; Execute Unauthorized Code or Commands; DoS: Crash, Exit, or Restart
When a memory buffer is accessed using the wrong type, it could read or write memory out of the bounds of the buffer, if the allocated buffer is smaller than the type that the code is attempting to access, leading to a crash and possibly code execution.
Frequently Asked Questions
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