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High, CVSS 7.5amended

Directory Traversal in lactate

GHSA-68gr-cmcp-g3mj

What to do

Vendor response not established. Follow the primary source's mitigation guidance and check back for a fix.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

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Affected packages

  • npm lactate

    Affected
    <= 0.13.12
    Fixed in
    no fixed version recorded

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS
7.5 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS
No dated EPSS signal available.
Source description

As published by the source; long descriptions are shortened.

A crafted GET request can be leveraged to traverse the directory structure of a host using the lactate web server package, and request arbitrary files outside of the specified web root. This allows for a remote attacker to gain access to arbitrary files on the filesystem that the process has access to read. Mitigating factors: Only files that the user running lactate has permission to read will be accessible via this vulnerability. Proof of concept: Please globally install the lactate package and cd to a directory you wish to serve assets from. Next, run lactate -p 8081 to start serving files from this location. The following cURL request can be used to demonstrate this vulnerability by requesting the target /etc/passwd file: Recommendation As there is currently no fix for this issue selecting an alternative static web server would be the best choice.

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 2 · amended ·

    Amended from ghsa record GHSA-68gr-cmcp-g3mj

  2. Revision 1 · created ·

    Published from osv record GHSA-68gr-cmcp-g3mj

Agent brief

Preview the exact text before you copy it. Commands are read-only suggestions; review them before running anything.

# Patch Next advisory brief: GHSA-68gr-cmcp-g3mj

Advisory: Directory Traversal in lactate
IDs: GHSA-68gr-cmcp-g3mj
Record: https://patchnext.com/advisories/ghsa-68gr-cmcp-g3mj (revision 2, source checked 26 Oct 2026, 12:06 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 7.5)
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
- npm lactate: affected <= 0.13.12

## Suggested inspection (read-only)
- `npm ls lactate --all`: lists every installed copy and version, including transitive ones. Run in the project root after `npm ci`.

## 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 lactate.
- 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-68gr-cmcp-g3mj (OSV record GHSA-68gr-cmcp-g3mj lists affected ranges: npm lactate >=0 <=0.13.12)
- Verified: https://github.com/advisories/GHSA-68gr-cmcp-g3mj (GitHub-reviewed advisory GHSA-68gr-cmcp-g3mj lists affected ranges: npm lactate >=0 <=0.13.12)

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