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HIGH severity

CVE-2026-42283 — devspace

HIGH

CVE-2026-42283 is a high-severity (CVSS 7.7) Information Exposure vulnerability in github.com/loft-sh/devspace. A fix is available for github.com/loft-sh/devspace — see the affected versions and patch details below.

DevSpace UI Server WebSocket CheckOrigin does not validate source

Also known asGHSA-hqwm-7x7x-8379GO-2026-5433
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Nov 9, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

  • A successful exploit gives an attacker total control of the affected component, not partial access.
  • CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for CVE-2026-42283.

EPSS Exploitation Probability

via FIRST.org ↗
0.2%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs4th percentile — riskier than 4% of all scored CVEsHighest risk
0.00%0.22%0.43%0.65%0.0%0.2%Jun 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected
🐹github.com/loft-sh/devspace

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Go packages — download data is not available via public APIs for these ecosystems.

Description

Description

DevSpace's UI server WebSocket accepts connections from all origins by default, and therefore several endpoints are exposed via this WebSocket. When a developer runs the DevSpace UI and at the same time uses a browser to access the internet, a malicious website they visit can use their browser to establish a cross-origin WebSocket connection to ws://127.0.0.1:8090. This allows an attacker to access:

  • /api/logs to stream real-time pod logs
  • /api/enter to open an interactive shell inside the running pod
  • /api/command to execute pre-defined pipeline commands

Patches

Versions 6.3.21 and above are patched.

Resources

gorilla/websocket CheckOrigin documentation

Installation Options

Devspace is no longer publishing to NPM or Yarn, please continue to use our other installation methods to get updates in the future, including this patch.

Credit

DevSpace thanks @b0b0haha for finding and reporting this vulnerability.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐹Gogithub.com/loft-sh/devspace≥ 6.3.20&&< 6.3.216.3.21go get github.com/loft-sh/devspace@v6.3.21

Affected Products

1 product · 1 configurations
Application
devspacedevspace
1 version
6.3.20

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/loft-sh/devspace, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update github.com/loft-sh/devspace to 6.3.21 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2026-42283 is resolved across your whole dependency graph.

  3. Workarounds

    Put an independent control in front of the weakness: restrict the affected endpoint or interface to trusted networks, require an additional authentication factor or proxy-level check, and invalidate existing sessions and credentials in case the flaw has already been used.

Frequently Asked Questions

### Description DevSpace's UI server WebSocket accepts connections from all origins by default, and therefore several endpoints are exposed via this WebSocket. When a developer runs the DevSpace UI and at the same time uses a browser to access the internet, a malicious website they visit can use their browser to establish a cross-origin WebSocket connection to `ws://127.0.0.1:8090`. This allows an attacker to access: * `/api/logs` to stream real-time pod logs * `/api/enter` to open an interactive shell inside the running pod * `/api/command` to execute pre-defined pipeline commands ### Patc
O3 Security · Impact-Aware SCA

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CVE-2026-42283: devspace — Fixed in 6.3.21