vulnerability / NVI-00004899 / Revision 2
Pimcore has Unsafe PHP Deserialization in Multiple Locations Without allowed_classes Restriction
OSV carries this publisher advisory for pimcore/pimcore, pimcore/pimcore, pimcore/pimcore. This is an aggregated source copy; consult the original publisher and compare update dates.
This report has not inspected your inventory, configuration, deployed build, reachability or evidence. A catalog listing and a severity score do not establish exposure or compromise.
01 / Meaning
Why it matters
Published affected context helps an owner decide what evidence to gather. This report has not examined your application.
0.987%
FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.62416. Missing scores are unknown.
As of · FIRST EPSS
02 / Applicability
The affected context
Affected versions, configuration prerequisites and known exclusions are public. Confirm each one against the deployed service.
pimcore/pimcore
source listedECOSYSTEM: introduced 12.0.0-RC1; fixed 12.3.7
# GitHub Security Advisory Draft — GM-374 ## Summary Multiple locations in Pimcore v11 call PHP's `unserialize()` on data from database columns and filesystem files without the `allowed_classes` restriction, enabling object injection if an attacker can control the serialized data source. ## Severity CVSS 3.1: 8.0 (High) — AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H ## Affected Component - **Package:** `pimcore/pimcore` and `pimcore/admin-ui-classic-bundle` - **Files:** - `lib/Tool/Authentication.php` (line 82) — session token deserialization - `models/Site/Dao.php` (line 68) — site domains from database - `models/DataObject/ClassDefinition/CustomLayout/Dao.php` (line 69) — layout definitions from database - `models/Tool/TmpStore/Dao.php` (line 64) — temporary store data from database - `models/Asset/WebDAV/Service.php` (line 36) — delete log from filesystem - `admin-ui-classic-bundle/src/Helper/Dashboard.php` (line 64) — dashboard config from filesystem ## Description Six locations in Pimcore core call `unserialize()` directly (bypassing `Tool\Serialize`) on data sourced from database columns or filesystem files without passing the `allowed_classes` parameter. This means an
pimcore/pimcore
source listedECOSYSTEM: introduced 0; fixed 11.5.17
# GitHub Security Advisory Draft — GM-374 ## Summary Multiple locations in Pimcore v11 call PHP's `unserialize()` on data from database columns and filesystem files without the `allowed_classes` restriction, enabling object injection if an attacker can control the serialized data source. ## Severity CVSS 3.1: 8.0 (High) — AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H ## Affected Component - **Package:** `pimcore/pimcore` and `pimcore/admin-ui-classic-bundle` - **Files:** - `lib/Tool/Authentication.php` (line 82) — session token deserialization - `models/Site/Dao.php` (line 68) — site domains from database - `models/DataObject/ClassDefinition/CustomLayout/Dao.php` (line 69) — layout definitions from database - `models/Tool/TmpStore/Dao.php` (line 64) — temporary store data from database - `models/Asset/WebDAV/Service.php` (line 36) — delete log from filesystem - `admin-ui-classic-bundle/src/Helper/Dashboard.php` (line 64) — dashboard config from filesystem ## Description Six locations in Pimcore core call `unserialize()` directly (bypassing `Tool\Serialize`) on data sourced from database columns or filesystem files without passing the `allowed_classes` parameter. This means an
pimcore/pimcore
source listedECOSYSTEM: introduced 2026.1.0; fixed 2026.1.3
# GitHub Security Advisory Draft — GM-374 ## Summary Multiple locations in Pimcore v11 call PHP's `unserialize()` on data from database columns and filesystem files without the `allowed_classes` restriction, enabling object injection if an attacker can control the serialized data source. ## Severity CVSS 3.1: 8.0 (High) — AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H ## Affected Component - **Package:** `pimcore/pimcore` and `pimcore/admin-ui-classic-bundle` - **Files:** - `lib/Tool/Authentication.php` (line 82) — session token deserialization - `models/Site/Dao.php` (line 68) — site domains from database - `models/DataObject/ClassDefinition/CustomLayout/Dao.php` (line 69) — layout definitions from database - `models/Tool/TmpStore/Dao.php` (line 64) — temporary store data from database - `models/Asset/WebDAV/Service.php` (line 36) — delete log from filesystem - `admin-ui-classic-bundle/src/Helper/Dashboard.php` (line 64) — dashboard config from filesystem ## Description Six locations in Pimcore core call `unserialize()` directly (bypassing `Tool\Serialize`) on data sourced from database columns or filesystem files without passing the `allowed_classes` parameter. This means an
03 / Response
What to do next
- vendor patch
The original advisory lists fixed boundaries 12.3.7 for pimcore/pimcore. Confirm the publisher’s latest guidance.
Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system. GitHub Advisory Database via OSV
- vendor patch
The original advisory lists fixed boundaries 11.5.17 for pimcore/pimcore. Confirm the publisher’s latest guidance.
Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system. GitHub Advisory Database via OSV
- vendor patch
The original advisory lists fixed boundaries 2026.1.3 for pimcore/pimcore. Confirm the publisher’s latest guidance.
Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system. GitHub Advisory Database via OSV
- investigate
Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.
Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system. FIRST EPSS
A fixed release is not deployment evidence.
Check current vendor support and compatibility. After making a change, verify the deployed build and relevant runtime conditions. Keep the evidence, owner and time. An updated lockfile alone does not prove what is running.
04 / Limits
What this report cannot establish
- Customer inventory, deployment, reachability and exploitation have not been inspected.
05 / Provenance
Sources you can inspect
Each assertion retains its source. Mirrored records may repeat one underlying publisher; additional links are not independent corroboration.
- GHSA-36fc-7wjg-mfvj ↗
GitHub Advisory Database via OSV · vendor advisory
Observed . GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.
- CVE-2026-45162 ↗
FIRST EPSS · official catalog
Observed . FIRST EPSS; probability of exploitation in the next 30 days, not local compromise. Dataset date/model retained; FIRST services terms apply.
Public revision history
Only published revisions appear here. Routine fetches do not create a material-change event.
- Revision 2 ·
Dated EPSS estimate updated; this is not a new disclosure or proof of exploitation.
- Revision 1 ·
First indexed by Null; source disclosure date is shown separately.