EUVD-2026-40256
GHSA-f7jr-jmf8-58m2
Severity by source
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/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
Local save-file load with no auth gives AV:L/AC:L/PR:N; victim must open the file (UI:R); arbitrary command execution yields full C:H/I:H/A:H with unchanged scope.
Primary rating from Vendor (jpcert).
CVSS VectorVendor: jpcert
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/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
Lifecycle Timeline
2DescriptionCVE.org
RPG MAKER MV and MZ provided by Gotcha Gotcha Games Inc. contain an OS command injection vulnerability. If a user loads a specially crafted save-file, arbitrary OS command may be executed.
AnalysisAI
Arbitrary OS command execution in RPG Maker MV and MZ (Gotcha Gotcha Games) is triggered when a victim loads a maliciously crafted save-file, allowing an attacker to run commands with the privileges of the game process. The flaw is a classic OS command injection (CWE-78) reported through JPCERT/JVN; no public exploit has been identified at time of analysis and it is not in CISA KEV. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the victim to actively load a specially crafted save-file into RPG Maker MV or MZ (or a game running on the vulnerable engine) - that load action is the exact trigger named in the advisory and maps to the CVSS UI:A and AV:L metrics. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The vendor CVSS 4.0 vector (AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H, score 8.4) describes a high-impact but local, user-interaction-dependent flaw: an attacker cannot reach it over the network and must convince a victim to load a crafted save-file. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker crafts a malicious RPG Maker save-file embedding shell metacharacters in a field the engine later passes to an OS command, then distributes it as a 'cheat save' or 'continue from here' file on a game forum or chat. When the victim loads the save in RPG Maker MV/MZ (or a game built on the vulnerable runtime), the embedded command executes with the user's privileges. … |
| Remediation | Update RPG Maker MV and MZ to the fixed releases announced by Gotcha Gotcha Games; the exact patched version is not stated in the supplied data, so consult the vendor advisories at https://rpgmakerofficial.com/en/news/4188/ and https://rpgmakerofficial.com/news/4183/ and the JVN advisory at https://jvn.jp/en/jp/JVN69681784/ for the precise build numbers before deploying. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Identify all RPG Maker MV and MZ installations within your development and operational environments. …
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Same weakness CWE-78 – OS Command Injection
View allSame technique Command Injection
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External POC / Exploit Code
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