CVE-2026-54569

Unauthenticated RCE via unsafe eval in SENAITE.CORE JSON API endpoints.

• CVSS 9.8
• 95
• Authentication, Authorization, and Session Management
• Remote

SENAITE.CORE is the core framework for the SENAITE laboratory information management system. From 2.0.0 to 2.6.0, the SENAITE.CORE JSON API permits unauthenticated remote code execution through a two-request chain involving missing authorization and unsafe evaluation. The state-changing routes in src/bika/lims/jsonapi/update.py, including update, update_many, remove, doActionFor, doActionFor_many, and getusers, do not enforce the senaite.core: Access JSON API permission before resolving attacker-selected objects. In src/bika/lims/jsonapi/init.py, set_fields_from_request passes raw request values for RecordsField and RecordField instances to eval() before field mutator write-permission checks execute. An anonymous attacker can discover the bika_setup object identifier through @@uuid, send a value such as RejectionReasons to /@@API/update, and execute arbitrary Python in the Zope worker before a later mutation failure rolls back ZODB changes. The same unsafe evaluation pattern is present in src/senaite/core/browser/fields/record.py and src/senaite/core/browser/fields/records.py. Successful exploitation can expose or modify laboratory data, files, and accounts and can disrupt the service.

CVE

CVE-2026-54569

CWE

95

CVSS base score

9.8

Published

2026-08-26

OWASP

A03 Injection

Orthogonal defect classification

Checking

Code defect classification

Missing Check

Category

Authentication, Authorization, and Session Management

Subcategory

Privilege Escalation

Accessibility scope

Remote

Impact

Arbitrary Code Execution

Affected component

SENAITE.CORE

Fixed by upgrading

Yes

Solution

Upgrade SENAITE.CORE to version 2.6.1 or newer, where the unauthorized JSON‑API code execution vulnerability is patched.

from senaite.core.browser.fields.record import RecordField

def set_fields_from_request(record, request):
    """
    Populate a RecordField from raw request data.
    """
    for name, field in record._fields.items():
        if isinstance(field, RecordField):
            # VULNERABLE: unsafe eval of client‑supplied data
            raw = request.get(name)
            if raw is not None:
                value = eval(raw)  # executes attacker‑controlled code
                field.set(value)

from senaite.core.browser.fields.record import RecordField
import ast

def set_fields_from_request(record, request):
    """
    Populate a RecordField from raw request data.
    """
    for name, field in record._fields.items():
        if isinstance(field, RecordField):
            # FIX: use safe literal evaluation instead of eval
            raw = request.get(name)
            if raw is not None:
                try:
                    value = ast.literal_eval(raw)  # only safe literals are allowed
                except (ValueError, SyntaxError):
                    continue
                field.set(value)

__VAITP_MODEL_REFUSED__

@misc{vaitp:cve202654569,
  title        = {{Unauthenticated RCE via unsafe eval in SENAITE.CORE JSON API endpoints.}},
  author       = {Bogaerts, Fr\'ed\'eric and Ivaki, Naghmeh and Fonseca, Jos\'e},
  year         = {2026},
  note         = {VAITP Python Vulnerability Dataset, entry CVE-2026-54569},
  howpublished = {\url{https://netpack.pt/vaitp/vulnerability/CVE-2026-54569/}}
}