Is this vulnerability remotely exploitable across the network?

It can be, if the Gearman service or relevant queues are exposed beyond a strictly controlled internal network and untrusted systems can connect to TCP port 4730 or otherwise enqueue jobs. In tightly segmented and correctly restricted environments, exposure is reduced but the unsafe sink remains present.

What level of access does an attacker need to exploit this issue?

An attacker needs the ability to connect to the Gearman service and submit jobs that will be processed by the vulnerable worker function. No additional authentication is enforced at the deserialization point itself; control over the job payload is the critical requirement.

What is the safest general fix pattern for this type of vulnerability?

The most robust fix is to remove unsafe deserialization entirely: stop using `unserialize()` on job payloads and adopt data-only serialization formats like JSON, combined with strict schema validation. Where deserialization must remain, apply class whitelisting, enforce payload integrity, and ensure that no sensitive side effects can be triggered during object reconstruction.

Severity:

HIGH RISK

(7.5)

PHP Unsafe Deserialization (CWE-502) in openITCOCKPIT Gearman Worker

CVE-2026-24891

Published:

Feb 20, 2026

Status:

Analyzed

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

NDV

Recent Vulnerabilities

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setGameSpeedCfg CGI Handler

Remote Code Execution on the Router

April 6, 2026

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setFirewallType Handler

Remote Code Execution on Router Firmware

April 6, 2026

Vulnerability Type

Category:

Unsafe Deserialization

CWE:

CWE-502

Impact:

Remote Code Execution via PHP Object Injection

Severity:

HIGH RISK

(7.5)

CVSS Version:

3.1

Vulnerability Type

Category:

Unsafe Deserialization

CWE:

CWE-502

Impact:

Remote Code Execution via PHP Object Injection

Severity:

HIGH RISK

(7.5)

CVSS Version:

3.1

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PHP Unsafe Deserialization (CWE-502) in openITCOCKPIT Gearman Worker

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

Recent Vulnerabilities

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setGameSpeedCfg CGI Handler

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setFirewallType Handler

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

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