Critical · CVSS 9.1CVE-2026-55083

DHIS2: Unsafe Java Deserialization - Remote Code Execution (RCE)

Answer in brief

CVE-2026-55083 records a Critical severity (CVSS 9.1) vulnerability in DHIS2: Unsafe Java Deserialization - Remote Code Execution (RCE). The current sources do not mark it as known exploited. The current feed maps dhis2/dhis2-core (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 1, 2026Updated Oct 1, 2026Source checked Oct 1, 2026First seen by HOL Oct 1, 2026Material review Oct 1, 2026

Upstream Advisory

Key facts

Risk: Critical · CVSS 9.1
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

CVSS is 9.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps dhis2/dhis2-core (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
dhis2/dhis2-coregeneric	>=2.42.0 <2.42.5.1 \|\| >=2.43.0 <2.43.0.1	2.42.5.1, 2.43.0.1

Recommended response

Check inventory. Check lockfiles and deployed manifests for dhis2/dhis2-core.
Review the reported fix. Update dhis2/dhis2-core to 2.42.5.1 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Oct 1, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Oct 1, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Oct 1, 2026

Sources and claim methodology

Upstream source description

DHIS2 is a flexible information system for data capture, management, validation, analytics and visualization. From versions 2.42.0 to before 2.42.5.1, and from versions 2.43.0 to before 2.43.0.1, DHIS2 is vulnerable to remote code execution (RCE) via unsafe Java deserialization. This issue has been patched in versions 2.42.5.1, 2.43.0.1, and 2.44.

Quoted source text, attributed separately from HOL analysis.