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Unsafe Java Deserialization - Remote Code Execution (RCE)

Critical
netroms published GHSA-3fr2-wvqx-cmr5 Jun 11, 2026

Package

maven dhis2-core (Maven)

Affected versions

2.42.x before 2.42.5.1, 2.43.0 before 2.43.0.1, 2.44 development branch before PR #24162

Patched versions

2.42.5.1, 2.43.0.1, 2.44 development branch after PR #24162

Description

Unsafe Java Deserialization - Remote Code Execution

Researcher: Ahmed Najeh
Date:       2026-03-10
Target:     DHIS2 Core (latest master)
CWE:        CWE-502 - Deserialization of Untrusted Data
Severity:   Critical (CVSS 9.0)

1. Finding Summary

Vulnerability:        Unsafe Java Deserialization -> RCE
CVSS 3.1 Score:       9.0
CVSS Vector:          AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

Report by Ahmed Najeh - 2026-03-10

Severity

Critical

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
High
User interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

CVE ID

CVE-2026-55083

Weaknesses

Deserialization of Untrusted Data

The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid. Learn more on MITRE.

Credits