CVE-2026-56095Network attack vector

Arbitrary code execution via indexed serialized objects

Published Aug 25, 2026 · Updated Aug 25, 2026

Insecure deserialization in Apache Solr for TYPO3 allows remote authenticated users to execute arbitrary code during indexing. The indexer passes values returned by SOLR_CLASSIFICATION, SOLR_MULTIVALUE, and SOLR_RELATION content objects to PHP unserialize(), reconstructing attacker-supplied objects rather than parsing a non-executable data format. Exploitation requires permission to save content that reaches an indexed field; successful object injection runs in the indexing process and can compromise its confidentiality, integrity, and availability.

CVSS severity7.7
High
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Insecure deserialization in Apache Solr for TYPO3 allows remote authenticated users to execute arbitrary code during indexing. The indexer passes values returned by SOLR_CLASSIFICATION, SOLR_MULTIVALUE, and SOLR_RELATION content objects to PHP unserialize(), reconstructing attacker-supplied objects rather than parsing a non-executable data format. Exploitation requires permission to save content that reaches an indexed field; successful object injection runs in the indexing process and can compromise its confidentiality, integrity, and availability.

The record

CVE
CVE-2026-56095
Published
Aug 25, 2026
Updated
Aug 25, 2026
Vendor
in2code GmbH
Product
Apache Solr for TYPO3
Classifications
CWE-502, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 25, 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=0 <11.6.6
  2. Affected versionversion=12.0.0 <12.1.4
  3. Affected versionversion=13.0.0 <13.1.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

in2code GmbH · Apache Solr for TYPO3version=0 <11.6.6; version=12.0.0 <12.1.4; version=13.0.0 <13.1.4

Published CVSS scores

7.7TYPO3CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA: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-502Deserialization of Untrusted Data
T1190Exploit Public-Facing Application

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

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Your stack

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