deps: bump step-security/harden-runner from 2.19.0 to 2.19.1

[dependabot]

Bumps step-security/harden-runner from 2.19.0 to 2.19.1.

Release notes

Sourced from step-security/harden-runner's releases.

v2.19.1

What's Changed

• fix: detect ubuntu-slim runners early and bail out by @​devantler in step-security/harden-runner#657

What the fix changes

• Harden-Runner will detect ubuntu-slim runners and exit cleanly with an informational log message, instead of post harden runner step failing on chown: invalid user: 'undefined'.

What the fix does not do

• Jobs running on ubuntu-slim will not be monitored by Harden-Runner. The agent relies on kernel-level features (that require elevated capabilities).
• Per GitHub's docs on single-CPU runners: "The container for ubuntu-slim runners runs in unprivileged mode. This means that some operations requiring elevated privileges such as mounting file systems, using Docker-in-Docker, or accessing low-level kernel features are not supported." Those low-level kernel features are what the agent needs, so monitoring inside the unprivileged container is not feasible today.

For StepSecurity enterprise customers If your security posture requires that workflows are always monitored, you can block the use of ubuntu-slim via workflow run policies see the Runner Label Policy docs. This lets you enforce that jobs only run on monitored runner types.

New Contributors

• @​devantler made their first contribution in step-security/harden-runner#657

Full Changelog: step-security/harden-runner@v2.19.0...v2.19.1

Commits

• a5ad31d Merge pull request #657 from devantler/fix/ubuntu-slim-user-env
• 6e92856 build dist and trim ubuntu-slim message
• 4e0504e Merge branch 'main' into fix/ubuntu-slim-user-env
• 376d25a fix: detect ubuntu-slim runners early and bail out
• See full diff in compare view

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[github-actions]

Dependency Security Scan

Packages scanned: step-security/harden-runner (v2.19.1)

Results

No known exploits found affecting the target versions.

Source	Vulnerabilities
GitHub Advisory (GHSA)	0 affecting target
OSV.dev	0 affecting target

Auto-merge has been enabled. This PR will merge once all status checks pass.

5 historical advisory/ies (patched at or before target version — not blocking)

ID	Severity	Summary	Source	Patched In
GHSA-46g3-37rh-v698	MODERATE	Egress Policy Bypass via DNS over HTTPS (DoH) in Harden-Runner (Community Tier)	GHSA	2.16.0
GHSA-g699-3x6g-wm3g	MODERATE	Egress Policy Bypass via DNS over TCP in Harden-Runner (Community Tier)	GHSA	2.16.0
GHSA-cpmj-h4f6-r6pq	MODERATE	Harden-Runner: Bypassing Logging of Outbound Connections Using sendto, sendmsg, and sendmmsg in Harden-Runner (Community Tier)	GHSA	2.14.2
GHSA-mxr3-8whj-j74r	MODERATE	Harden-Runner allows evasion of 'disable-sudo' policy	GHSA	2.12.0
GHSA-g85v-wf27-67xc	LOW	Harden-Runner has a command injection weaknesses in setup.ts and arc-runner.ts	GHSA	2.10.2

### Release Age (cooldown: 7 days)

Package	Version	Published	Age	Status
step-security/harden-runner	v2.19.1	2026-05-02	9d	✅ passed

Project Health (OpenSSF Scorecard)

Action	Score	Details
step-security/harden-runner	8.1/10	View

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Last scanned: 2026-05-12 06:37 UTC