CVE-2026-25894 — fuxa-server
Fix: frangoteam/FUXA@ea7b3dfCVE-2026-25894 is a CWE-321 vulnerability in fuxa-server. A fix is available for fuxa-server — see the affected versions and patch details below.
FUXA Unauthenticated Remote Code Execution via Hardcoded JWT Secret in Default Configuration
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-2026-25894.
EPSS Exploitation Probability
EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.
Real-World Exposure
How broadly this vulnerability is actually deployed: weekly install volume shows current usage, a proxy for how much of the ecosystem is exposed.
fuxa-servernpmDescription
Description
An insecure default configuration in FUXA allows an unauthenticated, remote attacker to gain administrative access and execute arbitrary code on the server. This affects FUXA through version 1.2.9 when authentication is enabled, but the administrator JWT secret is not configured. This issue has been patched in FUXA version 1.2.10.
Impact
The FUXA documentation allows administrators to manually update a hardcoded JWT secret when enabling authentication. This feature was not available in the UI. This results in a fail-open security posture, where the application can report or appear to be operating in secureEnabled mode while still accepting tokens signed with a publicly known key.
Exploitation allows an unauthenticated, remote attacker to forge JWTs to bypass all authentication mechanisms and obtain administrative access to the FUXA instance. With these elevated privileges, the attacker can interact with administrative APIs, including intended features designed for automation and scripting, to execute arbitrary code in the context of the FUXA service. Depending on deployment configuration and permissions, this may lead to full system compromise and could further expose connected ICS/SCADA environments to follow-on actions.
Patches
This issue has been patched in FUXA version 1.2.10. Users are strongly encouraged to update to the latest available release.
Notes
GitHub stated this vulnerability is identical to CVE-2025-69971, which was published against the repository out of band before coordinated disclosure concluded. CVE-2025-69971 is directionally correct, but the description is inaccurate. Please refer to this advisory for the proper description and affected versions.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 📦npm | fuxa-server | all versions | 1.2.10npm install fuxa-server@1.2.10 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for fuxa-server, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update fuxa-server to 1.2.10 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2026-25894 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like CVE-2026-25894 can be triaged on real exposure rather than presence alone.
Tailored to CVE-2026-25894. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is CVE-2026-25894 in your dependencies?
O3 Security finds CVE-2026-25894 across npm dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.