🛡️ CVE-2026-42555 — case

🔴 CVSS 9.5 — Critical ✅ No Known Exploit CWE-94 NVD
9.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Valtimo has SpEL injection via StandardEvaluationContext that allows Remote Code Execution by admin users

Summary

Multiple classes evaluate Spring Expression Language (SpEL) expressions from user-supplied input using StandardEvaluationContext, which provides unrestricted access to Java types and methods. An authenticated user with the ADMIN role can achieve Remote Code Execution and credential exfiltration.

Impact

An attacker with ADMIN credentials can:

  • Execute arbitrary OS commands via T(java.lang.Runtime).getRuntime().exec('...')
  • Exfiltrate all environment variables (database passwords, API keys, Keycloak secrets) via T(java.lang.System).getenv()
  • Read JVM system properties via T(java.lang.System).getProperties()
  • Load arbitrary classes via T(java.lang.Class).forName('...')

Affected Components

1. DocumentMigrationService (since 12.0.0)

Exploitable through the document migration REST API:

  • POST /api/management/v1/document-definition/migrate
  • POST /api/management/v1/document-definition/migration/conflicts

The malicious SpEL expression is supplied in the source or target field of a DocumentMigrationPatch object in the request body, using the ${...} template syntax.

  • In 12.x: com.ritense.document.service.DocumentMigrationService#handleSpelExpression (document module)
  • In 13.x: same class, moved to the case module

2. Condition (since 13.4.0)

Exploitable through any admin-configured widget, dashboard, or feature that uses the Condition framework. The SpEL expression is supplied in the value field of a condition's JSON configuration.

  • com.ritense.valtimo.contract.conditions.Condition#resolveValue (contract module)

This component has a significantly wider attack surface than DocumentMigrationService, as conditions are used across many modules.

Remediation

Replace StandardEvaluationContext with SimpleEvaluationContext in both affected classes, which disallows Java type references and arbitrary method invocation:

```kotlin

val evaluationContext = SimpleEvaluationContext

.forPropertyAccessors(MapAccessor(), jsonPropertyAccessor)

.build()

```

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs administrative privileges on the target. No user interaction is required. The scope is changed, meaning a successful attack can affect components beyond the vulnerable one. Rated impact: confidentiality high, integrity high, availability high.

Weakness class

CVE-2026-42555 is classified as CWE-94: Code Injection. Input is incorporated into code that the runtime evaluates, so an attacker can have their own code executed.

Affected software

CVE-2026-42555 is recorded against 4 packages.

  • com.ritense.valtimo:case (from 13.0.0 up to 13.23.0)
  • com.ritense.valtimo:contract (from 13.4.0 up to 13.23.0)
  • com.ritense.valtimo:document (from 12.0.0 up to 12.32.0)
  • unknown

Timeline and source

Published on 6 May 2026 and last revised on 14 May 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

github.com (Web)
nvd.nist.gov (Advisory)
github.com (Package)

Details

Severity CRITICAL
CVSS Score 9.5
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
CWE CWE-94
Public Exploit ✅ No
Source NVD
Published 2026-05-06
Updated 2026-08-12
Modified 2026-05-14
Fix URL N/A

Affected Packages

Software From version Fixed in
com.ritense.valtimo:case 13.0.0 13.23.0
com.ritense.valtimo:contract 13.4.0 13.23.0
com.ritense.valtimo:document 12.0.0 12.32.0
unknown — —

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