AWS SAM CLI Path Traversal allows file copy to local cache

Exploitation

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

CVSS 4.0

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

EPSS

• CVE-2025-3048: 0.67% estimated exploitation activity in the next 30 days; percentile 52.10 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Summary The AWS Serverless Application Model Command Line Interface (AWS SAM CLI) is an open-source CLI tool that helps Lambda developers to build and develop Lambda applications locally on their computers using Docker. After completing a build with AWS SAM CLI which include symlinks, the content of those symlinks are copied to the cache of the local workspace as regular files or directories. As a result, a user who does not have access to those symlinks outside of the Docker container would now have access via the local workspace. Users should upgrade to v1.134.0 or newer and ensure any forked or derivative code is patched to incorporate the new fixes. After upgrading, users must re-build their applications using the sam build --use-container to update the symlinks. Impact The issue is limited to the local workspace and does not affect AWS services, production environments or cross-account resources. The issue only affects workspaces using the AWS SAM CLI with container builds…

Published by the source

31 Mar 2025, 22:36 UTC

Last modified by the source

7 Jul 2026, 17:57 UTC

Source last checked

26 Oct 2026, 13:35 UTC

1. Revision 3 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-pp64-wj43-xqcr

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-pp64-wj43-xqcr

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# Patch Next advisory brief: CVE-2025-3048

Advisory: AWS SAM CLI Path Traversal allows file copy to local cache
IDs: CVE-2025-3048, GHSA-pp64-wj43-xqcr
Record: https://patchnext.com/advisories/cve-2025-3048 (revision 3, source checked 26 Oct 2026, 13:35 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 6.9)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: aws-sam-cli 1.134.0. A vendor fix does not mean a deployment is fixed.

## Affected components
- PyPI aws-sam-cli: affected < 1.134.0; fixed in 1.134.0

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

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on aws-sam-cli.
- 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-pp64-wj43-xqcr (OSV record GHSA-pp64-wj43-xqcr lists affected ranges: PyPI aws-sam-cli >=0 <1.134.0 (fixed))
- Verified: https://github.com/advisories/GHSA-pp64-wj43-xqcr (GitHub-reviewed advisory GHSA-pp64-wj43-xqcr lists affected ranges: PyPI aws-sam-cli >=0 <1.134.0)

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