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Pin each GitHub Action to the full commit SHA of the exact revision you have reviewed, using the form OWNER/REPOSITORY@FULL_COMMIT_SHA. GitHub documents a full-length SHA as the only currently available way to reference an action as an immutable release. Pinning stabilizes which code the workflow selects; it does not certify that code as safe or automatically bring in later fixes.
Pin an action to a full commit SHA
Replace a tag or branch reference in a workflow step with the full commit SHA for the intended revision. For example, the syntax is:
steps:
- uses: actions/checkout@FULL_COMMIT_SHAFULL_COMMIT_SHA is explanatory text, not a valid value to leave in a workflow. Use the complete SHA for the commit you intend to run. Do not use an abbreviated SHA, and do not copy an unverified value: confirm the commit belongs to the action’s source repository rather than a fork. See GitHub’s secure-use guidance.
- Identify the action and version or revision your workflow should use.
- Open the action’s source repository and verify the full commit SHA for that revision.
- Review the code and declared behavior at that exact revision, then replace the existing reference with
OWNER/REPOSITORY@FULL_COMMIT_SHA. - Review what permissions and secrets the calling job makes available, and test the workflow after the change.
Why use a SHA instead of a tag or branch?
A tag is easier to recognize as a release label, but its owner can move or delete it. A branch reference follows the version currently on that branch, so later changes can affect a workflow without changing its YAML. A full commit SHA fixes the reference to a specific commit.
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- Read Before You Buy — No Video Output: These adapters support charging and USB 2.0 data transfer, but cannot transmit video signals. Except for standard USB webcams (which use USB data only), they are not compatible with HDMI/DisplayPort cables, video-capable USB-C hubs, or docking stations with video output.
- Convert USB-A Ports to USB-C: Designed to connect USB-C earphones, cables, flash drives, card readers, and other USB-C accessories to standard USB-A ports. Plug-and-play with no drivers or software required.
- Aluminum Alloy Housing: Built with a sturdy aluminum alloy shell that aids in heat dissipation and protects against daily wear and scratches. Designed to maintain a stable and secure connection.
- Compact & Travel-Friendly: The ultra-compact design allows the adapter to stay plugged into your device without blocking adjacent ports or adding bulk, reducing wear and tear on your original USB ports.
- 12-Month Warranty: Backed by a 12-month manufacturer warranty for peace of mind. Designed to meet strict quality control standards for reliable everyday performance.
| Reference | What it selects | Trade-off |
|---|---|---|
| Full commit SHA | A specific commit; GitHub describes this as the immutable action reference. | Later fixes are not adopted automatically. Review and update the pin deliberately. |
| Release tag | A human-readable release label. | The tag can be moved or deleted, changing or removing the code the workflow resolves to. |
| Branch | The version currently on that branch. | Future branch changes can alter the code or introduce breaking changes without a workflow edit. |
For third-party actions where reproducibility and supply-chain control matter, use a full SHA. GitHub advises using a tag only when you trust the action’s creator and accept the mutability trade-off. Its workflow building-block guidance also notes that Dependabot creates alerts for vulnerable GitHub Actions only when they use semantic versioning. Do not assume a SHA-pinned action will receive those alerts.
Pin reusable workflows separately
A reusable workflow is referenced at the job level, not as a step. An external workflow can be called in this form:
Rank #2
- 5-in-1 USB-C Hub: Experience comprehensive connectivity featuring a Power Delivery input, two USB-A 2.0 ports, a USB-A 3.0 port, and an HDMI port. (Note: The USB-C power delivery input port is only for connecting an external wall charger to power your laptop and cannot power peripheral devices.)
- 90W Pass-Through Charging: Achieve optimal charging with 90W pass-through power to your laptop, supported by a total input of 100W, with the hub reserving 10W for operational efficiency. (Note: Wall charger not included.)
- Quick Data Transfers: Accelerate your productivity with rapid data transfers using a high-speed 5Gbps USB 3.0 port and two 480Mbps USB 2.0 ports.
- 4K HDMI Display: Enhance your visual experience with a hub capable of delivering 4K resolution at 30Hz in both mirror and extend modes. Please note that this hub is compatible with MacBook (macOS 12 and newer), Windows 10 and 11, ChromeOS, and laptops equipped with DP Alt Mode and Power Delivery. Note: This device is not compatible with Linux.
- What You Get: Anker USB-C Hub (5-in-1, 4K HDMI), welcome guide, 18-month warranty, and our friendly customer service.
jobs:
call-workflow:
uses: OWNER/REPOSITORY/.github/workflows/WORKFLOW.yml@FULL_COMMIT_SHAGitHub supports a commit SHA, release tag, or branch for external reusable workflows and identifies the SHA as the safest choice for stability and security. Check the path and revision in the workflow’s source repository. See GitHub’s reusable workflows documentation.
Require SHA pins with repository settings
Repository administrators can configure a policy requiring actions to be pinned to full-length commit SHAs. GitHub documents the policy as applying to GitHub-authored, organization-authored, and third-party actions. Its documented behavior allows reusable workflows to remain referenced by tag under that policy, so do not treat the setting as proof that every workflow reference is SHA-pinned. Check the current repository or organization settings and GitHub’s repository Actions settings documentation for the exact controls available to your account.
Rank #3
- Sleek 7-in-1 USB-C Hub: Features an HDMI port, two USB-A 3.0 ports, and a USB-C data port, each providing 5Gbps transfer speeds. It also includes a USB-C PD input port for charging up to 100W and dual SD and TF card slots, all in a compact design.
- Flawless 4K@60Hz Video with HDMI: Delivers exceptional clarity and smoothness with its 4K@60Hz HDMI port, making it ideal for high-definition presentations and entertainment. (Note: Only the HDMI port supports video projection; the USB-C port is for data transfer only.)
- Double Up on Efficiency: The two USB-A 3.0 ports and a USB-C port support a fast 5Gbps data rate, significantly boosting your transfer speeds and improving productivity.
- Fast and Reliable 85W Charging: Offers high-capacity, speedy charging for laptops up to 85W, so you spend less time tethered to an outlet and more time being productive.
- What You Get: Anker USB-C Hub (7-in-1), welcome guide, 18-month warranty, and our friendly customer service.
Review the code and limit workflow permissions
A stable reference is not a security review. Before adopting an action, inspect the code at the pinned revision and consider how it handles repository content, secrets, and outbound communication. GitHub warns that an action can interact with other jobs and may access configured secrets or use the GITHUB_TOKEN; grant a workflow only the permissions its jobs need. GitHub suggests OpenSSF Scorecards as one way to help identify potentially vulnerable workflows and other risks, but a score does not replace checking the exact code and permissions you use.
GitHub explains that SHA pinning helps mitigate the risk of a bad actor adding a backdoor by requiring a SHA-1 collision for a valid Git object payload. That is a protection for the integrity of the selected reference, not a guarantee against all supply-chain risks.
Rank #4
- Dual Converters, Infinite Potential：Includes 2× USB C male to USB A female adapters and 2× USB A male to USB C female adapters. Perfect for a wide range of uses—tablets with Bluetooth keyboards, expand USB ports on macbook, and more. Two different converters for all your daily needs
- Next-Level 10Gbps & 3A Charging: No more slow 480Mbps, this usb to usb c adapter has a transfer speed of up to 10Gbps, allowing you to do more transferring in less time. This usb adapter fits both USB A and USB C charger, supporting up to 3A fast charging
- Upgraded Exquisite Craftsmanship: With an aluminum alloy housing and metal connector, the usbc to usb adapter is extremely durable and sturdy. Rigorously tested to withstand more than 10,000 times of plugging and unplugging, ensuring long-lasting performance
- Broad Compatible: The usb c to usb adapter widely supports all USB C/ USB A devices like laptops, tablets, cellphones, car chargers, and phone chargers. Such as compatible with MacBook Pro/Air 2023/2022, Thunderbolt 4/3 Devices,Apple MagSafe Watch 9/8/7/SE/Ultra, iPad Pro 2022/2021, Samsung Galaxy S23/S20/S10, and iPhone 17/16/15 Pro. Plug and play
- Please Note: To reach 10Gbps speed, keep the cable under 3.3 ft. For USB A Male to USB C adapters, try flipping the USB C connector. USB C Male to USB A adapters support bidirectional 10Gbps transfer within 3.3 ft
Keep pins current through review
A pin will not move to a newer release on its own. Establish a recurring review process to check for fixes and security updates, verify the new revision in its source repository, review the change, and update the SHA deliberately. GitHub’s custom action management guidance is relevant when maintaining actions you own; for third-party actions, review their source and release history before changing a pin.
Quick Recap
Best Value
- 5-in-1 Connectivity: Equipped with a 4K HDMI port, a 5 Gbps USB-C data port, two 5 Gbps USB-A ports, and a USB C 100W PD-IN port. Note: The USB C 100W PD-IN port supports only charging and does not support data transfer devices such as headphones or speakers.
- Powerful Pass-Through Charging: Supports up to 85W pass-through charging so you can power up your laptop while you use the hub. Note: Pass-through charging requires a charger (not included). Note: To achieve full power for iPad, we recommend using a 45W wall charger.
- Transfer Files in Seconds: Move files to and from your laptop at speeds of up to 5 Gbps via the USB-C and USB-A data ports. Note: The USB C 5Gbps Data port does not support video output.
- HD Display: Connect to the HDMI port to stream or mirror content to an external monitor in resolutions of up to 4K@30Hz. Note: The USB-C ports do not support video output.
- What You Get: Anker 332 USB-C Hub (5-in-1), welcome guide, our worry-free 18-month warranty, and friendly customer service.
- Track which action and revision each pin represents so reviewers can see what changed.
- When updating, verify the new full SHA against the intended action repository and inspect the code change.
- Monitor vulnerability information separately; SHA references are not a substitute for alerts or update reviews.
- After an update, test the workflow and retain only the token permissions and secrets it needs.
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