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Medium, CVSS 5.8amended

Fonoster is vulnerable to directory traversal

CVE-2024-43035GHSA-9fv2-c7v6-p45w

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (@fonoster/voice 0.6.1), redeploy, then verify what is actually installed.

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

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS
5.8 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N
EPSS
  • CVE-2024-43035: 2.40% estimated exploitation activity in the next 30 days; percentile 84.03 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.
Source description

As published by the source; long descriptions are shortened.

Fonoster 0.5.5 before 0.6.1 allows ../ directory traversal to read arbitrary files via the /sounds/:file or /tts/:file VoiceServer endpoint. This occurs in serveFiles in mods/voice/src/utils.ts. NOTE: serveFiles exists in 0.5.5 but not in the next release, 0.6.1.

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

    Amended from ghsa record GHSA-9fv2-c7v6-p45w

  2. Revision 1 · created ·

    Published from osv record GHSA-9fv2-c7v6-p45w

Agent brief

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

# Patch Next advisory brief: CVE-2024-43035

Advisory: Fonoster is vulnerable to directory traversal
IDs: CVE-2024-43035, GHSA-9fv2-c7v6-p45w
Record: https://patchnext.com/advisories/cve-2024-43035 (revision 2, source checked 26 Oct 2026, 12:43 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 5.8)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: @fonoster/voice 0.6.1. A vendor fix does not mean a deployment is fixed.

## Affected components
- npm @fonoster/voice: affected >= 0.5.5, < 0.6.1; fixed in 0.6.1

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

## 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 @fonoster/voice.
- 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-9fv2-c7v6-p45w (OSV record GHSA-9fv2-c7v6-p45w lists affected ranges: npm @fonoster/voice >=0.5.5 <0.6.1 (fixed))
- Verified: https://github.com/advisories/GHSA-9fv2-c7v6-p45w (GitHub-reviewed advisory GHSA-9fv2-c7v6-p45w lists affected ranges: npm @fonoster/voice >=0.5.5 <0.6.1)

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