Is CVE-2026-29792 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-29792 being exploited in the wild.

How severe is CVE-2026-29792?

Medium severity, with a CVSS score of 4, published 10 March 2026.

Which products and versions are affected?

Feathers Authentication-Oauth 5.0.0 through 5.0.41; @feathersjs/authentication-oauth (npm) SEMVER:introduced=5.0.0,fixed=5.0.42.

Is there a fix for CVE-2026-29792?

Yes. @feathersjs/authentication-oauth (npm): upgrade to 5.0.42 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-29792 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-29792?

Check whether you run Feathers Authentication-Oauth or @feathersjs/authentication-oauth (npm) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-29792: Feathers OAuth callback account takeover

CVE-2026-29792 · Severity: medium · CVSS 4 · Published 2026-03-10

Feathers is a JavaScript backend framework that includes OAuth authentication support. An unauthenticated attacker can forge a malicious request to bypass the OAuth authentication flow and obtain a valid access token for any existing user account, leading to complete account takeover without needing valid OAuth credentials.

Technologies: Feathers Authentication-Oauth, @feathersjs/authentication-oauth (npm). Vendors: Feathers, npm.

Quick answers

Is CVE-2026-29792 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-29792 being exploited in the wild.
How severe is CVE-2026-29792?: Medium severity, with a CVSS score of 4, published 10 March 2026.
Which products and versions are affected?: Feathers Authentication-Oauth 5.0.0 through 5.0.41; @feathersjs/authentication-oauth (npm) SEMVER:introduced=5.0.0,fixed=5.0.42.
Is there a fix for CVE-2026-29792?: Yes. @feathersjs/authentication-oauth (npm): upgrade to 5.0.42 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-29792 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-29792?: Check whether you run Feathers Authentication-Oauth or @feathersjs/authentication-oauth (npm) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

@feathersjs/authentication-oauth (npm): upgrade to 5.0.42 or later
```
npm install @feathersjs/authentication-oauth@5.0.42
```

Technical details

The vulnerability exists in the OAuth callback handler (/oauth/:provider/callback) which contains a fallback chain that reaches the raw request query parameters when the OAuth provider's session/state validation is empty. Since an attacker never initiates a legitimate OAuth authorize flow, the Grant library has no session to validate and produces no response, causing the fallback to fire. The attacker can then inject a forged profile via query parameters, which is used for entity lookup and JWT token generation, resulting in a valid access token for an arbitrary user. This is an unauthenticated, network-accessible bypass of the authentication mechanism. The vulnerability affects @feathersjs/authentication-oauth versions 5.0.0 through 5.0.41 and is fixed in version 5.0.42.

Affected products

Feathers authentication-oauth 5.0.0 through 5.0.41

Identifiers

CVE-2026-29792
GHSA-wg9x-qfgw-pxhj

Timeline

2026-03-10: disclosed
2026-03-10: patched: Fixed in version 5.0.42

References

https://github.com/feathersjs/feathers/security/advisories/GHSA-wg9x-qfgw-pxhj

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