CVE-2026-33463Network attack vector

File disclosure via expired public share tokens

Published May 28, 2026 · Updated May 28, 2026

Authorization bypass in Elastic Kibana 8.0.0 through 8.19.15 and 9.0.0 through 9.3.4 allows remote attackers to retrieve shared files. Kibana's public file-sharing logic accepts a time-bounded access token after its expiration timestamp instead of rejecting the request. Exploitation requires possession of a token issued for a public file share and discloses only the content associated with that token after expiration.

CVSS severity5.3
Medium
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Authorization bypass in Elastic Kibana 8.0.0 through 8.19.15 and 9.0.0 through 9.3.4 allows remote attackers to retrieve shared files. Kibana's public file-sharing logic accepts a time-bounded access token after its expiration timestamp instead of rejecting the request. Exploitation requires possession of a token issued for a public file share and discloses only the content associated with that token after expiration.

The record

CVE
CVE-2026-33463
Published
May 28, 2026
Updated
May 28, 2026
Vendor
Elastic
Product
Kibana
Classifications
CWE-672, T1213
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 28, 2026CVE publishedPublication date reported by the CVE source.
  2. May 28, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=8.0.0 <=8.19.15
  2. Affected versionversion=9.0.0 <=9.3.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Elastic · Kibanaversion=8.0.0 <=8.19.15; version=9.0.0 <=9.3.4

Published CVSS scores

5.3ElasticCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-672Operation on a Resource after Expiration or Release
T1213Data from Information Repositories

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo