Which versions of Java are affected by CVE-2026-4953?

mingSoft MCMS versions 5.5.0 and earlier contain a server-side request forgery vulnerability in the Editor Endpoint that allows unauthenticated attackers to hijack the application server to make…

Is there a public PoC exploit available for CVE-2026-4953?

Yes, a public proof-of-concept exploit is available for CVE-2026-4953. Prioritise patching immediately. EPSS: 0.0%.

How to fix or mitigate CVE-2026-4953?

Within 24 hours: Identify and inventory all mingSoft MCMS deployments running version 5.5.0 or earlier; implement network segmentation to restrict outbound HTTP/HTTPS from MCMS servers and disable or restrict access to the Editor Endpoint's catchImage function if operationally feasible. Within 7 days: Apply input validation and WAF rules to reject suspicious catchimage parameter values; conduct network traffic analysis to detect anomalous outbound requests from MCMS servers. Within 30 days: Monitor mingSoft security advisories for patched version release; prepare for immediate patching upon availability; consider evaluation of alternative content management solutions if patch timeline becomes extended.

Java CVE-2026-4953

Q: What is the CVSS score of CVE-2026-4953?

CVE-2026-4953 has a CVSS 4.0 base score of 5.5 (Medium). CVSS vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X. EPSS exploitation probability: 0.0%.

EUVD-2026-16629 MEDIUM

Server-Side Request Forgery (SSRF) (CWE-918)

2026-03-27 VulDB

GHSA-xmm3-9x39-98r5

Java SSRF

5.5

CVSS 4.0 · NVD

Severity by source

NVD PRIMARY

5.5 MEDIUM

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Lifecycle Timeline

CVSS changed

Apr 29, 2026 - 01:11 NVD

6.9 (MEDIUM) 5.5 (MEDIUM)

PoC Detected

Mar 30, 2026 - 13:26 vuln.today

Public exploit code

EUVD ID Assigned

Mar 27, 2026 - 14:30 euvd

EUVD-2026-16629

Analysis Generated

Mar 27, 2026 - 14:30 vuln.today

CVE Published

Mar 27, 2026 - 14:13 nvd

MEDIUM 6.9

DescriptionCVE.org

A weakness has been identified in mingSoft MCMS 迄 5.5.0. This issue affects the function catchImage of the file net/mingsoft/cms/action/BaseAction.java of the component Editor Endpoint. Executing a manipulation of the argument catchimage can lead to server-side request forgery. It is possible to launch the attack remotely. The exploit has been made available to the public and could be used for attacks.

AnalysisAI

Server-side request forgery in mingSoft MCMS versions through 5.5.0 enables remote unauthenticated attackers to force the application server to make arbitrary HTTP requests to internal or external systems via the catchimage parameter in the Editor Endpoint's catchImage function. Publicly available exploit code exists (GitHub POC published), increasing immediate risk. …

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Vulnerability AssessmentAI

Risk Assessment	Real-world risk is elevated due to convergence of multiple threat signals. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario	An unauthenticated remote attacker crafts a malicious HTTP request to the MCMS Editor Endpoint, manipulating the catchimage parameter to contain the URL of an internal service (such as http://169.254.169.254/latest/meta-data/ for cloud metadata or http://192.168.1.10:8080/admin for internal admin panels). The vulnerable catchImage function processes this input without validation, causing the MCMS server to issue the attacker-controlled request and potentially return sensitive data including cloud credentials, internal service responses, or network topology information. …
Remediation	No vendor-released patch version has been identified in the available intelligence at time of analysis. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 24 hours: Identify and inventory all mingSoft MCMS deployments running version 5.5.0 or earlier; implement network segmentation to restrict outbound HTTP/HTTPS from MCMS servers and disable or restrict access to the Editor Endpoint's catchImage function if operationally feasible. …

Threat intelligence, references, and detailed analysis are available after sign-in.

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CVE-2026-4953 vulnerability details – vuln.today

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