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Critical, CVSS 10.0amended

FUXA Unauthenticated Remote Code Execution via Admin JWT Minting

CVE-2026-25893GHSA-vwcg-c828-9822

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (fuxa-server 1.2.10), 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 4.0
10.0 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H · score source
EPSS
  • CVE-2026-25893: 0.77% estimated exploitation activity in the next 30 days; percentile 55.66 (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.

Note GitHub incorrectly stated this vulnerability is identical to CVE-2025-69970, which describes the fact that authentication is disabled by default. This advisory describes an exploit chain that enables authentication bypass via the heartbeat refresh endpoint when authentication is enabled. This misleads users into thinking that enabling authentication would mitigate this vulnerability. Please see the patch for more information: https://github.com/frangoteam/FUXA/commit/fe82348d160904d0013b9a3e267d50158f5c7afb. Description An authentication bypass vulnerability in FUXA allows an unauthenticated, remote attacker to gain administrative access via the heartbeat refresh API and execute arbitrary code on the server. This affects FUXA through version 1.2.9 when authentication is enabled. This issue has been patched in FUXA version 1.2.10. Impact Affected deployments are those with runtime.settings.secureEnabled set to true. Exploitation allows an unauthenticated, remote attacker to…

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 4 · amended ·

    Amended from ghsa record GHSA-vwcg-c828-9822

  2. Revision 3 · amended ·

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

  3. Revision 2 · amended ·

    Amended from osv record GHSA-vwcg-c828-9822

  4. Revision 1 · created ·

    Published from ghsa record GHSA-vwcg-c828-9822

Agent brief

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# Patch Next advisory brief: CVE-2026-25893

Advisory: FUXA Unauthenticated Remote Code Execution via Admin JWT Minting
IDs: CVE-2026-25893, GHSA-vwcg-c828-9822
Record: https://patchnext.com/advisories/cve-2026-25893 (revision 4, source checked 26 Oct 2026, 12:42 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Critical (CVSS 10.0)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: fuxa-server 1.2.10. A vendor fix does not mean a deployment is fixed.

## Affected components
- npm fuxa-server: affected <= 1.2.9; fixed in 1.2.10

## Suggested inspection (read-only)
- `npm ls fuxa-server --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 fuxa-server.
- 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://github.com/advisories/GHSA-vwcg-c828-9822 (GitHub-reviewed advisory GHSA-vwcg-c828-9822 lists affected ranges: npm fuxa-server >=0 <=1.2.9)
- Verified: https://osv.dev/vulnerability/GHSA-vwcg-c828-9822 (OSV record GHSA-vwcg-c828-9822 lists affected ranges: npm fuxa-server >=0 <1.2.10 (fixed))

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