Deserialization of Untrusted Data Affecting pgadmin4 package, versions [,9.15)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applicationsSnyk Learn
Learn about Deserialization of Untrusted Data vulnerabilities in an interactive lesson.
Start learning- Snyk IDSNYK-PYTHON-PGADMIN4-16757945
- published19 May 2026
- disclosed11 May 2026
- creditFernando Bortotti
Introduced: 11 May 2026
CVE-2026-7818 (opens in a new tab)How to fix?
Upgrade pgadmin4 to version 9.15 or higher.
Overview
pgadmin4 is a PostgreSQL Tools
Affected versions of this package are vulnerable to Deserialization of Untrusted Data in the FileBackedSessionManager. An attacker can execute arbitrary code by placing a crafted serialized payload into the sessions directory, which is deserialized without integrity verification.
Note: This is only exploitable if the attacker has write access to the sessions directory, either through misconfiguration or in combination with another flaw such as path traversal.
Details
Serialization is a process of converting an object into a sequence of bytes which can be persisted to a disk or database or can be sent through streams. The reverse process of creating object from sequence of bytes is called deserialization. Serialization is commonly used for communication (sharing objects between multiple hosts) and persistence (store the object state in a file or a database). It is an integral part of popular protocols like Remote Method Invocation (RMI), Java Management Extension (JMX), Java Messaging System (JMS), Action Message Format (AMF), Java Server Faces (JSF) ViewState, etc.
Deserialization of untrusted data (CWE-502) is when the application deserializes untrusted data without sufficiently verifying that the resulting data will be valid, thus allowing the attacker to control the state or the flow of the execution.