MS SWIFT Deserialization RCE Vulnerability

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS 4.0

6.6 · CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P · score source

EPSS

No dated EPSS signal available.

As published by the source; long descriptions are shortened.

This appears to be a security vulnerability report describing a remote code execution (RCE) exploit in the ms-swift framework through malicious pickle deserialization in adapter model files. The vulnerability allows arbitrary command execution when loading specially crafted adapter models from ModelScope. This occurs when using machine torch version < 2.6.0, while ms-swift accepts torch version = 2.0 I. Detailed Description: 1. Install ms-swift 2. Start web-ui 3. After startup, you can access http://localhost:7860/ through your browser to see the launched fine-tuning framework program 4. Upload an adapter model repository (cyjhhh/loraadapter4llama3) on ModelScope, where the lora/adaptermodel.bin file is generated through the following code: 5. First training submission: First, fill in the required parameters in the LLM Training interface, including Model id and Dataset Code, and configure the following in the Other params section of Advanced settings 6. Click Begin to submit. You can…

Published by the source

31 Jul 2025, 14:05 UTC

Last modified by the source

12 Aug 2025, 05:50 UTC

Source last checked

26 Oct 2026, 13:32 UTC

1. Revision 3 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-r54c-2xmf-2cf3

2. Revision 2 · amended · 25 Oct 2026

   Reviewed OSV alias/range/CVSS4 correction; package source scopes and original publication preserved. No customer finding resolved.

3. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-r54c-2xmf-2cf3

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# Patch Next advisory brief: GHSA-r54c-2xmf-2cf3

Advisory: MS SWIFT Deserialization RCE Vulnerability
IDs: GHSA-r54c-2xmf-2cf3
Record: https://patchnext.com/advisories/ghsa-r54c-2xmf-2cf3 (revision 3, source checked 26 Oct 2026, 13:32 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 6.6)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor response not established. A vendor fix does not mean a deployment is fixed.

## Affected components
- PyPI ms-swift: affected <= 3.6.3

## Suggested inspection (read-only)
- `python -m pip show ms-swift`: prints the installed version. Run with the environment that serves production active.

## Supported action
No complete vendor fix is recorded. Follow the primary source's mitigation guidance and check this record again before closing anything.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on ms-swift.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GHSA-r54c-2xmf-2cf3 (OSV record GHSA-r54c-2xmf-2cf3 lists affected ranges: PyPI ms-swift >=0 <=3.6.3)
- Verified: https://github.com/advisories/GHSA-r54c-2xmf-2cf3 (GitHub-reviewed advisory GHSA-r54c-2xmf-2cf3 lists affected ranges: PyPI ms-swift >=0 <=3.6.3)

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