CVE-2026-56137

Arbitrary command execution via crafted save file

Published Jun 30, 2026 · Updated Jun 30, 2026

OS command injection in Gotcha Gotcha Games RPG Maker MV 1.6.3 and earlier and MZ 1.10.0 and earlier allows attackers to run arbitrary commands. The disclosed records identify crafted save-file loading as the input path but do not name the parser, field, or unsafe command-building operation. Exploitation requires a user to load attacker-supplied save data, after which commands execute with that user's operating-system privileges.

CVSS severity8.4
High
EPSS probability1.09%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in Gotcha Gotcha Games RPG Maker MV 1.6.3 and earlier and MZ 1.10.0 and earlier allows attackers to run arbitrary commands. The disclosed records identify crafted save-file loading as the input path but do not name the parser, field, or unsafe command-building operation. Exploitation requires a user to load attacker-supplied save data, after which commands execute with that user's operating-system privileges.

The record

CVE
CVE-2026-56137
Published
Jun 30, 2026
Updated
Jun 30, 2026
Vendor
Gotcha Gotcha Games Inc.
Product
RPG Maker MZ
Classifications
CWE-78, T1203, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 30, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 30, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.10.0 and earlier

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Gotcha Gotcha Games Inc. · RPG Maker MZversion=1.10.0 and earlier
Gotcha Gotcha Games Inc. · RPG Maker MVversion=1.6.3 and earlier

Published CVSS scores

7.8JPCERT/CCCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
8.4JPCERT/CCCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1203Exploitation for Client Execution
T1204.002User Execution: Malicious File

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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