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CVE-2026-107360

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

  • Critical 9.6

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.

Key facts

Published
12 Nov 2026
Last changed
13 Nov 2026
Assigned by
redhat
EPSS
0.512% likely to be exploited in the next 30 days, higher than 44.26% of CVEs (scores for 15 Nov 2026)
SSVC (CISA)
Exploitation: none; Automatable: no; Technical impact: total

Severity scores

Each score is shown as its source gave it. They are not averaged or merged.

  • 9.6CVSS 3.1, Criticalfrom the CNA (redhat)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N

What to do

  • 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.CNA workaround statement

Historical context and remediation

This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.

No separately sourced impact summary is available on this page yet. Consult the description, version data and dated exploitation evidence.

Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.

Read the original CVE record.

Affected products

VendorProductVersions
Red HatRed Hat Satellite 6.16 for RHEL 8
  • Default status: affected
  • 0:1.5.0-3.el8sat up to but excluding * (unaffected)
Red HatRed Hat Satellite 6.16 for RHEL 9
  • Default status: affected
  • 0:1.5.0-3.el9sat up to but excluding * (unaffected)
Red HatRed Hat Satellite 6.17 for RHEL 9
  • Default status: affected
  • 0:1.5.0-3.el9sat up to but excluding * (unaffected)
Red HatRed Hat Satellite 6.18 for RHEL 9
  • Default status: affected
  • 0:1.5.0-3.el9sat up to but excluding * (unaffected)
Red HatRed Hat Satellite 6.19 for RHEL 9
  • Default status: affected
  • 0:1.5.0-3.el9sat up to but excluding * (unaffected)

Timeline

  1. 2 Oct 2026 Reported to Red Hat.
  2. 12 Nov 2026 Made public.
  3. 12 Nov 2026 Published

Weakness

References