CVE-2026-1770Public exploitNetwork attack vector

Authenticated OS command execution via Groovy sandbox bypass

Published Feb 2, 2026 · Updated Feb 2, 2026

Code injection in Crafter Studio before 4.5.0 allows remote authenticated users with developer access to execute OS commands. The Groovy sandbox fails to reject crafted constructs using AST transformations, expression parsers, and object factories that reach command-capable Java APIs. Developer-level Studio or site-repository access is required; successful exploitation runs commands with the server process's privileges.

CVSS severityUnavailable
Unscored
EPSS probability0.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Code injection in Crafter Studio before 4.5.0 allows remote authenticated users with developer access to execute OS commands. The Groovy sandbox fails to reject crafted constructs using AST transformations, expression parsers, and object factories that reach command-capable Java APIs. Developer-level Studio or site-repository access is required; successful exploitation runs commands with the server process's privileges.

The record

CVE
CVE-2026-1770
Published
Feb 2, 2026
Updated
Feb 2, 2026
Vendor
Crafter Software Corporation
Product
CrafterCMS
Classifications
CWE-913, CAPEC-253, T1059
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

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

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=4.0.0 <4.5.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Crafter Software Corporation · CrafterCMSversion=4.0.0 <4.5.0

Published CVSS scores

4.5Crafter CMSCVSS:4.0/AV:N/AC:H/AT:N/PR:H/UI:N/VC:L/VI:H/VA:H/SC:H/SI:H/SA:H/E:U

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)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-913Improper Control of Dynamically-Managed Code Resources
CAPEC-253Remote Code Inclusion
T1059Command and Scripting Interpreter

Public exploit references

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

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo