EUVD-2026-58260
GHSA-39jx-7xf9-qq62
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
PR:L confirmed by requirement for Synthetics write privilege; S:U retained as Kibana remains the single authorization authority despite cross-space impact; C:N as no data disclosure occurs.
Primary rating from Vendor (elastic).
CVSS VectorVendor: elastic
Lifecycle Timeline
2DescriptionCVE.org
Incorrect Authorization (CWE-863) in Kibana can lead to unauthorized deletion of Synthetics private locations via Accessing Functionality Not Properly Constrained by ACLs (CAPEC-1). Synthetics private locations can be shared with more than one space, and deleting one removes it from every space it is shared with. The safeguard that prevented the deletion of a private location still in use evaluated only the monitors visible in the requesting user's own space, so monitors that depend on the private location in other spaces were not taken into account. As a result, an authenticated Kibana user holding the Synthetics write privilege in a single space could delete a private location that other spaces still depend on, even where the user has no access to those spaces. Deleting the private location removes the shared configuration and stops the monitors in the other spaces from running, which suppresses the availability monitoring those spaces rely on.
AnalysisAI
Incorrect authorization in Kibana's Synthetics feature allows an authenticated user holding only Synthetics write privilege in a single space to permanently delete private locations shared across multiple spaces, including those the user has no access to. The root cause is an incomplete access-control check that evaluates only the monitors visible in the requesting user's own space, ignoring dependent monitors in other spaces. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an attacker to hold an authenticated Kibana account with the Synthetics write privilege in at least one space (CVSS PR:L confirmed). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 5.4 medium score (AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L) accurately reflects that exploitation requires authenticated access with at least Synthetics write privilege in one space - not unauthenticated or anonymous access. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade Kibana to version 8.19.20 (for the 8.x release line) or 9.4.4 (for the 9.x release line), as detailed in the Elastic advisory ESA-2026-90 at https://discuss.elastic.co/t/kibana-8-19-20-and-9-4-4-security-update-esa-2026-90/389518. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-863 – Incorrect Authorization
View allSame technique Authentication Bypass
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External POC / Exploit Code
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