What is the CVSS score of CVE-2026-29109?

CVE-2026-29109 has a CVSS 3.1 base score of 7.2 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.0%.

Which versions of PHP are affected by CVE-2026-29109?

Organizations using SuiteCRM face moderate risk from CVE-2026-29109, a insecure deserialization vulnerability rated CVSS 7.2.

How to fix or mitigate CVE-2026-29109?

Within 7 days: Identify all affected systems and apply vendor patches promptly. Restrict deserialization to trusted data sources and implement integrity checks.

PHP CVE-2026-29109

HIGH

Deserialization of Untrusted Data (CWE-502)

2026-03-20 security-advisories@github.com

PHP Deserialization

7.2

CVSS 3.1 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

7.2 HIGH

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

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 20, 2026 - 00:30 vuln.today

CVE Published

Mar 20, 2026 - 00:16 nvd

HIGH 7.2

DescriptionGitHub Advisory

SuiteCRM is an open-source, enterprise-ready Customer Relationship Management (CRM) software application. Versions up to and including 8.9.2 contain an unsafe deserialization vulnerability in the SavedSearch filter processing component that allows an authenticated administrator to execute arbitrary system commands on the server. FilterDefinitionProvider.php calls unserialize() on user-controlled data from the saved_search.contents database column without restricting instantiable classes. Version 8.9.3 patches the issue.

AnalysisAI

Unsafe deserialization in SuiteCRM versions up to 8.9.2 allows authenticated administrators to execute arbitrary system commands on the server through the SavedSearch filter processing component. The vulnerability stems from improper handling of unserialized data in the FilterDefinitionProvider.php file, which fails to restrict instantiable classes when processing user-controlled input from the database. SuiteCRM 8.9.3 and later versions contain the fix.

Technical ContextAI

Insecure deserialization occurs when untrusted data is used to reconstruct objects, allowing attackers to manipulate serialized data to execute arbitrary code. This vulnerability is classified as Deserialization of Untrusted Data (CWE-502).

RemediationAI

Avoid deserializing untrusted data. Use safe serialization formats (JSON instead of native serialization). Implement integrity checks on serialized data.