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High, CVSS 7.7amended

OpenClaw: stageSandboxMedia destination symlink traversal can overwrite files outside sandbox workspace

CVE-2026-31990GHSA-cfvj-7rx7-fc7c

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (openclaw 2026.3.2), 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

  • npm openclaw

    Affected
    <= 2026.3.1
    Fixed in
    2026.3.2

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS 4.0
7.7 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:H/SA:N · score source
EPSS
  • CVE-2026-31990: 0.14% estimated exploitation activity in the next 30 days; percentile 3.29 (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.

Summary stageSandboxMedia allowed destination symlink traversal during media staging, which could overwrite files outside the sandbox workspace root. Impact When sandbox media staging handled inbound files, destination writes under media/inbound were not destination-alias-safe. If a symlink existed in that destination path, the write could follow it and overwrite host files outside the intended sandbox workspace boundary. Affected Packages / Versions - Package: openclaw (npm) - Latest published version checked: 2026.3.1 - Affected: <= 2026.3.1 - Patched versions: = 2026.3.2 (released) Root Cause stageSandboxMedia validated source paths but wrote destination files with a direct copy path that did not enforce destination boundary/alias checks. Remediation The fix routes staging writes through root-scoped safe write primitives for both local and SCP-staged attachments, preventing destination symlink traversal escapes. Fix Commit(s) - 17ede52a4be3034f6ec4b883ac6b81ad0101558a

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 3 · amended ·

    Amended from ghsa record GHSA-cfvj-7rx7-fc7c

  2. Revision 2 · amended ·

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

  3. Revision 1 · created ·

    Published from osv record GHSA-cfvj-7rx7-fc7c

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-2026-31990

Advisory: OpenClaw: stageSandboxMedia destination symlink traversal can overwrite files outside sandbox workspace
IDs: CVE-2026-31990, GHSA-cfvj-7rx7-fc7c
Record: https://patchnext.com/advisories/cve-2026-31990 (revision 3, source checked 26 Oct 2026, 12:46 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 7.7)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: openclaw 2026.3.2. A vendor fix does not mean a deployment is fixed.

## Affected components
- npm openclaw: affected <= 2026.3.1; fixed in 2026.3.2

## Suggested inspection (read-only)
- `npm ls openclaw --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 openclaw.
- 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-cfvj-7rx7-fc7c (OSV record GHSA-cfvj-7rx7-fc7c lists affected ranges: npm openclaw >=0 <2026.3.2 (fixed))
- Verified: https://github.com/advisories/GHSA-cfvj-7rx7-fc7c (GitHub-reviewed advisory GHSA-cfvj-7rx7-fc7c lists affected ranges: npm openclaw >=0 <=2026.3.1)

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