Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-73419— NextAuth.js: OAuth state, nonce, and PKCE check cookies are not bound to the provider that created them

Quick assessment

Affected
nextauthjs next-auth
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Auth.js是Auth.js组织的一款提供身份验证功能的开发框架。 Auth.js 0.41.3之前版本、next-auth 4.24.15之前版本和5.0.0-beta.4及之后且5.0.0-beta.32之前版本存在安全漏洞，该漏洞源于Auth.js将OAuth/OIDC反CSRF校验状态、nonce和PKCE验证器存储在未绑定创建提供商的全局cookie中，且回调时未验证cookie与回调提供商的身份，导致一个提供商的校验值可被另一个提供商接受，在多提供商应用中攻击者可诱骗受害者发起合法同源流程并

CVSS 6.8 · Medium EPSS 0.25% · P15

Possible ATT&CK Techniques 1 AI

T1556 · Modify Authentication Process

Affected Version Matrix 3

VendorProduct Version RangeStatus
@auth core < 0.41.3 affected
nextauthjs next-auth < 4.24.15 affected
>= 5.0.0-beta.4, < 5.0.0-beta.32 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-73419

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
NextAuth.js: OAuth state, nonce, and PKCE check cookies are not bound to the provider that created them
Source: CVE Program / CVE List V5
Vulnerability Description
NextAuth.js provides authentication for Next.js. Prior to@auth/core 0.41.3 and next-auth 4.24.15 and 5.0.0-beta.32, Auth.js stores the OAuth/OIDC anti-CSRF checks state, nonce, and the PKCE verifier in global cookies that are not bound to the provider that created them. On callback, a check value minted during a sign-in started with one provider can satisfy the callback for a different provider because the stored cookie is not verified against the callback provider's identity, including the provider ID, issuer, client ID, or redirect URI. In a multi-provider application that permits account linking while logged in, when one provider's authorization request is observable and a target provider callback can be satisfied without a PKCE verifier, an attacker can lure a victim into starting a legitimate same-origin flow and link the attacker's target-provider account to the victim's Auth.js user. The linked provider grants the attacker persistent sign-in to the victim's account, while cross-site request forgery alone is insufficient. This issue is fixed in @auth/core 0.41.3 and next-auth 4.24.15 and 5.0.0-beta.32.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对数据真实性的验证不充分
Source: CVE Program / CVE List V5
Vulnerability Title
Auth.js 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Auth.js是Auth.js组织的一款提供身份验证功能的开发框架。 Auth.js 0.41.3之前版本、next-auth 4.24.15之前版本和5.0.0-beta.4及之后且5.0.0-beta.32之前版本存在安全漏洞，该漏洞源于Auth.js将OAuth/OIDC反CSRF校验状态、nonce和PKCE验证器存储在未绑定创建提供商的全局cookie中，且回调时未验证cookie与回调提供商的身份，导致一个提供商的校验值可被另一个提供商接受，在多提供商应用中攻击者可诱骗受害者发起合法同源流程并
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
nextauthjs next-auth < 4.24.15 -
@auth core < 0.41.3 -

II. Public POCs for CVE-2026-73419

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-73419

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-73419 (4)

Vendor Advisories for CVE-2026-73419 (1)

Vendor Pages for CVE-2026-73419 (2)

IV. Related Vulnerabilities

Same product: next-auth
Same vendor: nextauthjs
Same weakness: CWE-345

V. Comments for CVE-2026-73419

No comments yet

Leave a comment