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CVE-2026-29792

Feathersjs Feathers authentication bypass

9.8 CRITICALEPSS 0.65%
  1. Published10 Mar 2026

Description

Feathersjs is a framework for creating web APIs and real-time applications with TypeScript or JavaScript. From 5.0.0 to before 5.0.42, an unauthenticated attacker can send a crafted GET request directly to /oauth/:provider/callback with a forged profile in the query string. The OAuth service's authentication payload has a fallback chain that reaches params.query (the raw request query) when Grant's session/state responses are empty. Since the attacker never initiated an OAuth authorize flow, Grant has no session to work with and produces no response, so the fallback fires. The forged profile then drives entity lookup and JWT minting. The attacker gets a valid access token for an existing user without ever contacting the OAuth provider. This vulnerability is fixed in 5.0.42.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Feathersjs Feathers≥ 5.0.0 < 5.0.42

Remediation

Fixed in
Feathersjs Feathers≥ 5.0.42

References

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Frequently asked

Is CVE-2026-29792 being actively exploited?

CVE-2026-29792 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.65%.

How severe is CVE-2026-29792?

CVE-2026-29792 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 0.65% probability of exploitation.

Which products are affected by CVE-2026-29792?

Affected products include Feathersjs Feathers.

How do I fix CVE-2026-29792?

Upgrade affected software to a fixed version, for example Feathersjs Feathers 5.0.42 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-29792 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.