CVE-2026-55220Public exploitNetwork attack vector

Code execution via unrestricted hotspot metadata deserialization

Published Aug 28, 2026 · Updated Aug 28, 2026

Object injection in Pimcore before 11.5.19, 12.0.0-RC1 through 12.3.9, and 2026.1.0 through 2026.1.5 allows remote attackers to execute code. Hotspotimage::getDataFromResource() falls back from failed JSON decoding to unrestricted Serialize::unserialize() on the __hotspots object-store column, allowing serialized objects to instantiate bundled gadget classes. Exploitation requires a separate capability to place crafted serialized bytes in that column; loading the affected DataObject then triggers magic methods that can write arbitrary files or execute code.

CVSS severity9.3
Critical
EPSS probability0.50%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Object injection in Pimcore before 11.5.19, 12.0.0-RC1 through 12.3.9, and 2026.1.0 through 2026.1.5 allows remote attackers to execute code. Hotspotimage::getDataFromResource() falls back from failed JSON decoding to unrestricted Serialize::unserialize() on the __hotspots object-store column, allowing serialized objects to instantiate bundled gadget classes. Exploitation requires a separate capability to place crafted serialized bytes in that column; loading the affected DataObject then triggers magic methods that can write arbitrary files or execute code.

The record

CVE
CVE-2026-55220
Published
Aug 28, 2026
Updated
Aug 28, 2026
Vendor
Pimcore
Product
Pimcore
Classifications
CWE-502, T1190
Attack vector
network
Privileges
unauthenticated

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=< 11.5.19
  2. Affected versionversion=>= 12.0.0-RC1, < 12.3.10
  3. Affected versionversion=>= 2026.1.0, < 2026.1.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Pimcore · Pimcoreversion=< 11.5.19; version=>= 12.0.0-RC1, < 12.3.10; version=>= 2026.1.0, < 2026.1.6

Published CVSS scores

9.3GitHubCVSS:4.0/AV:N/AC:L/AT:N/PR:N/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.

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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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data
T1190Exploit Public-Facing Application

Public exploit references

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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