CVE-2026-45083Network attack vector

Unauthenticated index compromise via unrestricted streaming expressions

Published May 27, 2026 · Updated May 27, 2026

Missing authentication in Goobi Viewer Core 4.8.0 through 26.04 allows remote attackers to read, alter, or delete Solr index data. The POST /api/v1/index/stream endpoint forwards arbitrary caller-supplied Solr streaming expressions to the backend without authentication or restriction. Network access to the endpoint is sufficient; update() and delete() expressions overwrite or remove indexed records, while reads bypass viewer access controls.

CVSS severity9.8
Critical
EPSS probability0.41%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authentication in Goobi Viewer Core 4.8.0 through 26.04 allows remote attackers to read, alter, or delete Solr index data. The POST /api/v1/index/stream endpoint forwards arbitrary caller-supplied Solr streaming expressions to the backend without authentication or restriction. Network access to the endpoint is sufficient; update() and delete() expressions overwrite or remove indexed records, while reads bypass viewer access controls.

The record

CVE
CVE-2026-45083
Published
May 27, 2026
Updated
May 27, 2026
Vendor
intranda GmbH
Product
Goobi Viewer Core
Classifications
CWE-306, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 27, 2026CVE publishedPublication date reported by the CVE source.
  2. May 27, 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=>= 4.8.0, < 26.04.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

intranda GmbH · Goobi Viewer Coreversion=>= 4.8.0, < 26.04.1

Published CVSS scores

9.8GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-306Missing Authentication for Critical Function
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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