# CVE-2026-107360: Rubygem-safemode: safemode: jail allow-list bypass via op-assign expressions

Status: published. Published: 2026-11-12. Updated: 2026-11-12.

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

- 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. (source: CNA: redhat)

## Affected products and versions

- Red Hat / Red Hat Satellite 6 (rubygem-safemode): Version range not reported. Source: CNA: redhat

## Severity and prioritization

- CVSS 3.1: 9.6 (critical); CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N; source: CNA: redhat

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-183

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://access.redhat.com/security/cve/CVE-2026-107360 (CNA: redhat; vdb-entry, x_refsource_REDHAT)

- https://bugzilla.redhat.com/show_bug.cgi?id=2547645 (CNA: redhat; issue-tracking, x_refsource_REDHAT)

## Provenance

- CNA: redhat: https://www.cve.org/CVERecord?id=CVE-2026-107360; retrieved 2026-11-12; source updated 2026-11-12

Revision: 91f456f565652022252497a2b302e8bab34f16ed7e7812bb9181a4e5f6a82c5f

Canonical: https://y2.dev/cve/CVE-2026-107360

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