rubygem-safemode: critical vulnerability

rubygem-safemode

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…

Do this now

Install the update for your version: Red Hat Satellite 6.16 for RHEL 8 → 0:1.5.0-3.el8sat; Red Hat Satellite 6.16 for RHEL 9 → 0:1.5.0-3.el9sat; Red Hat Satellite 6.17 for RHEL 9 → 0:1.5.0-3.el9sat (+1 more line in Fix it).

Fix it

Red Hat Satellite 6.16 for RHEL 8

Upgrade to Red Hat Satellite 6.16 for RHEL 8 0:1.5.0-3.el8sat

Red Hat Satellite 6.16 for RHEL 9

Upgrade to Red Hat Satellite 6.16 for RHEL 9 0:1.5.0-3.el9sat

Red Hat Satellite 6.17 for RHEL 9

Upgrade to Red Hat Satellite 6.17 for RHEL 9 0:1.5.0-3.el9sat

Red Hat Satellite 6.18 for RHEL 9

Upgrade to Red Hat Satellite 6.18 for RHEL 9 0:1.5.0-3.el9sat

First seen: 13 Nov 2026
Last update: 13 Nov 2026, 04:19 UTC
Fixed in: Red Hat Satellite 6.16 for RHEL 8 0:1.5.0-3.el8sat
Red Hat Satellite 6.16 for RHEL 9 0:1.5.0-3.el9sat
Red Hat Satellite 6.17 for RHEL 9 0:1.5.0-3.el9sat
Red Hat Satellite 6.18 for RHEL 9 0:1.5.0-3.el9sat
Identifiers: CVE-2026-107360
CVSS: 9.6
Source: news

Check this repository for exposure to one security incident from pwned.coffee. Report first, change nothing until I say so.

## rubygem-safemode: critical vulnerability
Severity: critical. Patch status: patched.
Affected: rubygem-safemode
Fixed in: Red Hat Satellite 6.16 for RHEL 8 0:1.5.0-3.el8sat, Red Hat Satellite 6.16 for RHEL 9 0:1.5.0-3.el9sat, Red Hat Satellite 6.17 for RHEL 9 0:1.5.0-3.el9sat, Red Hat Satellite 6.18 for RHEL 9 0:1.5.0-3.el9sat
Ids: CVE-2026-107360

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…

## Steps
1. Search the repo, its CI and infra config for rubygem-safemode. If present, report the version in use and whether it's affected.
2. Fix by release line: Red Hat Satellite 6.16 for RHEL 8: 0:1.5.0-3.el8sat. Red Hat Satellite 6.16 for RHEL 9: 0:1.5.0-3.el9sat. Red Hat Satellite 6.17 for RHEL 9: 0:1.5.0-3.el9sat. Red Hat Satellite 6.18 for RHEL 9: 0:1.5.0-3.el9sat.

## Fix by release line
| Line | State | Fix | Until then |
|---|---|---|---|
| Red Hat Satellite 6.16 for RHEL 8 | fixed | 0:1.5.0-3.el8sat | — |
| Red Hat Satellite 6.16 for RHEL 9 | fixed | 0:1.5.0-3.el9sat | — |
| Red Hat Satellite 6.17 for RHEL 9 | fixed | 0:1.5.0-3.el9sat | — |
| Red Hat Satellite 6.18 for RHEL 9 | fixed | 0:1.5.0-3.el9sat | — |

## Report
A table: file, product or package, version in use, affected yes/no, exact fix. Then anything a human has to check outside the repo.

If you have the pwned.coffee MCP server (https://pwned.coffee/mcp), call lookup_cve("CVE-2026-107360") for the latest, and check_repo with this repo's lockfiles, Dockerfiles and workflows for a full receipt.
Sources: https://access.redhat.com/errata/RHSA-2026:99949 https://nvd.nist.gov/vuln/detail/CVE-2026-107360
https://pwned.coffee/i/rubygem-safemode-security-advisory-cve-2026-107360

Timeline

13 Nov 2026, 04:19 UTC
Fix status: unknown → patched.
13 Nov 2026
First reported.

Receipt

Exploitation: No known exploitation
Fix by release line: Product Affected Fixed in Source
Red Hat Satellite 6.16 for RHEL 8 before 0:1.5.0-3.el8sat 0:1.5.0-3.el8sat CVE record (CNA) checked 13 Nov
Red Hat Satellite 6.16 for RHEL 9 before 0:1.5.0-3.el9sat 0:1.5.0-3.el9sat CVE record (CNA) checked 13 Nov
Red Hat Satellite 6.17 for RHEL 9 before 0:1.5.0-3.el9sat 0:1.5.0-3.el9sat CVE record (CNA) checked 13 Nov
Red Hat Satellite 6.18 for RHEL 9 before 0:1.5.0-3.el9sat 0:1.5.0-3.el9sat CVE record (CNA) checked 13 Nov
Score: CVSS 9.6 (critical). CVSS 3.1 9.6 (CNA redhat) for CVE-2026-107360
Last checked: 13 Nov 2026, 16:26 UTC

Product	Affected	Fixed in	Source
Red Hat Satellite 6.16 for RHEL 8	before 0:1.5.0-3.el8sat	0:1.5.0-3.el8sat	CVE record (CNA) checked 13 Nov
Red Hat Satellite 6.16 for RHEL 9	before 0:1.5.0-3.el9sat	0:1.5.0-3.el9sat	CVE record (CNA) checked 13 Nov
Red Hat Satellite 6.17 for RHEL 9	before 0:1.5.0-3.el9sat	0:1.5.0-3.el9sat	CVE record (CNA) checked 13 Nov
Red Hat Satellite 6.18 for RHEL 9	before 0:1.5.0-3.el9sat	0:1.5.0-3.el9sat	CVE record (CNA) checked 13 Nov

Sources: KEV – CVE record ✓ Vendor ✓

Sources

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