CVE-2026-49096Network attack vectorHinoki check available

Case denial of service via malformed links

Published Aug 13, 2026 · Updated Aug 13, 2026

Uncaught exception in Elastic Kibana Cases 8.0.0 through 8.19.19 allows remote authenticated users to block case display via a malformed comment. The case-comment formatter accepts stored malformed link syntax without validation or sanitization, then raises an unhandled error while rendering the case. Affected 9.x releases are 9.0.0 through 9.3.4, 9.4.0, and 9.4.1; case-comment privileges are required, and one stored comment blocks the case for every viewer until removal.

CVSS severity4.3
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Uncaught exception in Elastic Kibana Cases 8.0.0 through 8.19.19 allows remote authenticated users to block case display via a malformed comment. The case-comment formatter accepts stored malformed link syntax without validation or sanitization, then raises an unhandled error while rendering the case. Affected 9.x releases are 9.0.0 through 9.3.4, 9.4.0, and 9.4.1; case-comment privileges are required, and one stored comment blocks the case for every viewer until removal.

The record

CVE
CVE-2026-49096
Published
Aug 13, 2026
Updated
Aug 13, 2026
Vendor
Elastic
Product
Kibana
Classifications
CWE-248, CAPEC-153, T1565.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 13, 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=8.0.0 <=8.19.19
  2. Affected versionversion=9.0.0 <=9.3.4
  3. Affected versionversion=9.4.0
  4. Affected versionversion=9.4.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Elastic · Kibanaversion=8.0.0 <=8.19.19; version=9.0.0 <=9.3.4; version=9.4.0; version=9.4.1

Published CVSS scores

4.3ElasticCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

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.

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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-248Uncaught Exception
CAPEC-153Input Data Manipulation
T1565.001Stored Data Manipulation

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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