CVE-2026-84823
Description
A flaw was found in WildFly. A user with the Monitor role, which is the lowest standard Role-Based Access Control (RBAC) role, can exploit a path traversal vulnerability in the take-snapshot operation. By manipulating the name parameter, this user can write a copy of the server configuration to an arbitrary location. This allows the Monitor role to read back the server configuration, including sensitive credentials, which would otherwise be restricted by RBAC, leading to information disclosure.
Statement
This flaw has a Low impact on Red Hat products. An authenticated WildFly user with the Monitor role can exploit a path traversal vulnerability in the take-snapshot operation to disclose server configuration, including sensitive credentials. This bypasses Role-Based Access Control restrictions for configuration access but requires an existing low-privileged account and does not grant elevated privileges.
Mitigation
To mitigate this issue, restrict access to the WildFly management interface to trusted networks and users. Implement firewall rules to limit network reachability to the management ports. Additionally, review existing Role-Based Access Control (RBAC) assignments within WildFly and ensure that users are granted only the minimum necessary privileges, adhering to the principle of least privilege. Reviewing role assignments might impact functionality if users genuinely require the `Monitor` role for their operations.
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 | 7.1 | N/A | 7.1 |
| Attack Vector | Network | N/A | Network |
| 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 | Low | N/A | Low |
| Availability Impact | None | N/A | None |
Vector
Red Hat: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N
cve.org: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N
Understanding the Weakness (CWE)
Integrity,Confidentiality,Availability
Technical Impact: Execute Unauthorized Code or Commands
The attacker may be able to create or overwrite critical files that are used to execute code, such as programs or libraries.
Integrity
Technical Impact: Modify Files or Directories
The attacker may be able to overwrite or create critical files, such as programs, libraries, or important data. If the targeted file is used for a security mechanism, then the attacker may be able to bypass that mechanism. For example, appending a new account at the end of a password file may allow an attacker to bypass authentication.
Confidentiality
Technical Impact: Read Files or Directories
The attacker may be able to read the contents of unexpected files and expose sensitive data. If the targeted file is used for a security mechanism, then the attacker may be able to bypass that mechanism. For example, by reading a password file, the attacker could conduct brute force password guessing attacks in order to break into an account on the system.
Availability
Technical Impact: DoS: Crash, Exit, or Restart
The attacker may be able to overwrite, delete, or corrupt unexpected critical files such as programs, libraries, or important data. This may prevent the product from working at all and in the case of protection mechanisms such as authentication, it has the potential to lock out product users.
Acknowledgements
Red Hat would like to thank Hung Bach Ngoc (VinSOC Labs) for reporting this issue.
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