CVE-2026-29792
published 2026-03-10CVE-2026-29792: 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…
PriorityP264critical9.8CVSS 3.1
AVNACLPRNUINSUCHIHAH
EPSS
0.52%
40.1th percentile
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.
Affected
4 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| feathersjs | authentication-oauth | — | — |
| feathersjs | authentication-oauth | >= 5.0.0 < 5.0.42 | 5.0.42 |
| feathersjs | feathers | — | — |
| feathersjs | feathers | >= 5.0.0 < 5.0.42 | 5.0.42 |
CVSS provenance
nvdv3.19.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
nvdv4.09.3CRITICALCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Stop checking back — get the weekly exploitation signal.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
OSV
Feathers has an OAuth Callback Account Takeover issue
osv·2026-03-10
CVE-2026-29792 [CRITICAL] Feathers has an OAuth Callback Account Takeover issue
Feathers has an OAuth Callback Account Takeover issue
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. Critical (CVSS 9.8)
GHSA
Feathers has an OAuth Callback Account Takeover issue
ghsa·2026-03-10
CVE-2026-29792 [CRITICAL] CWE-287 Feathers has an OAuth Callback Account Takeover issue
Feathers has an OAuth Callback Account Takeover issue
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. Critical (CVSS 9.8)
No detection rules found.
No public exploits indexed.
2026-03-10
Published