CVE-2026-55425Network attack vectorHinoki check available

Protected-field disclosure via unchecked composite display fields

Published Aug 28, 2026 · Updated Aug 28, 2026

Information disclosure in Graylog Open Server 7.1.0 through 7.1.3 allows remote authenticated users to read protected database fields. EntityTitleServiceImpl builds entity titles from requested composite display fields without verifying that every referenced collection field is readable. Record permissions still apply, limiting ordinary users to permitted records, but exposed values include their password hashes; administrators can retrieve all user hashes.

CVSS severity5.0
Medium
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Information disclosure in Graylog Open Server 7.1.0 through 7.1.3 allows remote authenticated users to read protected database fields. EntityTitleServiceImpl builds entity titles from requested composite display fields without verifying that every referenced collection field is readable. Record permissions still apply, limiting ordinary users to permitted records, but exposed values include their password hashes; administrators can retrieve all user hashes.

The record

CVE
CVE-2026-55425
Published
Aug 28, 2026
Updated
Aug 28, 2026
Vendor
Graylog
Product
Graylog Open Server
Classifications
CWE-213, T1555
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 28, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 28, 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=>= 7.1.0, < 7.1.4
  2. Affected versionversion=>= 7.2.0-alpha.1, < 7.2.0-alpha.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Graylog · Graylog Open Serverversion=>= 7.1.0, < 7.1.4; version=>= 7.2.0-alpha.1, < 7.2.0-alpha.2

Published CVSS scores

5.0GitHub Security AdvisoryCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/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 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-213Exposure of Sensitive Information Due to Incompatible Policies
T1555Credentials from Password Stores

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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