CVE-2026-107360

Rubygem-safemode: safemode: jail allow-list bypass via op-assign expressions

Published Nov 12, 2026 CVSS 3.1 · 9.6 Critical EPSS n/a KEV · Not listed
Description
A flaw was found in rubygem-safemode. Compound assignment expressions in sandboxed code are evaluated without mediating method calls through the Jail allow-list. An authenticated attacker who can supply template content can invoke arbitrary no-argument methods on objects exposed to the template renderer without Jail mediation, including destructive operations such as host deletion and disclosure of non-allow-listed object state.

Remediation

Vendor Workaround

Restrict template edit privileges to trusted administrators until a fixed safemode release is deployed. Where feasible, avoid exposing highly privileged ActiveRecord objects to untrusted template authors.

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Redhat satellite Capsule
Redhat satellite Maintenance
Redhat satellite Utils
CPEs cpe:/a:redhat:satellite:6 cpe:/a:redhat:satellite:6.16::el8
cpe:/a:redhat:satellite:6.16::el9
cpe:/a:redhat:satellite:6.17::el9
cpe:/a:redhat:satellite:6.18::el9
cpe:/a:redhat:satellite_capsule:6.16::el8
cpe:/a:redhat:satellite_capsule:6.16::el9
cpe:/a:redhat:satellite_capsule:6.17::el9
cpe:/a:redhat:satellite_capsule:6.18::el9
cpe:/a:redhat:satellite_maintenance:6.17::el9
cpe:/a:redhat:satellite_maintenance:6.18::el9
cpe:/a:redhat:satellite_utils:6.16::el8
cpe:/a:redhat:satellite_utils:6.16::el9
cpe:/a:redhat:satellite_utils:6.17::el9
cpe:/a:redhat:satellite_utils:6.18::el9
Vendors & Products Redhat satellite Capsule
Redhat satellite Maintenance
Redhat satellite Utils
References
Metrics threat_severity

None

threat_severity

Critical

Type Values Removed Values Added
Description A flaw was found in rubygem-safemode. Compound assignment expressions in sandboxed code are evaluated without mediating method calls through the Jail allow-list. An authenticated attacker who can supply template content can invoke arbitrary no-argument methods on objects exposed to the template renderer without Jail mediation, including destructive operations such as host deletion and disclosure of non-allow-listed object state.
Title Rubygem-safemode: safemode: jail allow-list bypass via op-assign expressions
First Time appeared Redhat
Redhat satellite
Weaknesses CWE-183
CPEs cpe:/a:redhat:satellite:6
Vendors & Products Redhat
Redhat satellite
References
Metrics cvssV3_1

{'score': 9.6, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
redhat
Published
Updated
Nov 12, 2026, 11:56 PM
Reserved
Oct 7, 2026, 8:07 PM
Status
Awaiting Analysis
Published
Nov 12, 2026, 8:18 PM
Modified
Nov 13, 2026, 12:20 AM
Severity
Critical
Public date
Nov 12, 2026, 6:46 PM