CVE-2026-33458Network attack vector

Authenticated information disclosure via redirect allowlist bypass

Published Apr 8, 2026 · Updated Apr 8, 2026

SSRF in Elastic Kibana 9.3.0 through 9.3.2 allows remote authenticated users to read internal data through crafted workflow HTTP steps. The Workflows Execution Engine follows redirects from an allowed HTTP target without reapplying host allowlist restrictions to the redirect destination. Exploitation requires the engine to be enabled and an account with workflow creation and execution privileges; resulting requests expose reachable internal endpoints and their responses.

CVSS severity6.3
Medium
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in Elastic Kibana 9.3.0 through 9.3.2 allows remote authenticated users to read internal data through crafted workflow HTTP steps. The Workflows Execution Engine follows redirects from an allowed HTTP target without reapplying host allowlist restrictions to the redirect destination. Exploitation requires the engine to be enabled and an account with workflow creation and execution privileges; resulting requests expose reachable internal endpoints and their responses.

The record

CVE
CVE-2026-33458
Published
Apr 8, 2026
Updated
Apr 8, 2026
Vendor
Elastic
Product
Kibana
Classifications
CWE-918, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 8, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 8, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=9.3.0 <=9.3.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Elastic · Kibanaversion=9.3.0 <=9.3.2

Published CVSS scores

6.3ElasticCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
7.7NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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