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CVE-2026-31813— Supabase Auth has insecure Apple and Azure authentication with ID tokens

Quick assessment

Affected
supabase 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是Supabase开源的一个用户认证与管理系统。 Supabase Auth 2.185.0之前版本存在安全漏洞，该漏洞源于启用Apple或Azure提供程序时，攻击者可使用特制的ID令牌为任意用户颁发会话，可能导致攻击者获得有效用户会话。

CVSS 4.8 · Medium EPSS 0.22% · P11

Possible ATT&CK Techniques 1 AI

T1528 · Steal Application Access Token
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I. Basic Information for CVE-2026-31813

Vulnerability Information
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Vulnerability Title
Supabase Auth has insecure Apple and Azure authentication with ID tokens
Source: CVE Program / CVE List V5
Vulnerability Description
Supabase Auth is a JWT based API for managing users and issuing JWT tokens. Prior to 2.185.0, a vulnerability has been identified that allows an attacker to issue sessions for arbitrary users using specially crafted ID tokens when the Apple or Azure providers are enabled. The attacker issues a valid, asymmetrically signed ID token from their issuer for each victim email address, which then is sent to the Supabase Auth token endpoint using the ID token flow. If the ID token is OIDC compliant, the Auth server would validate it against the attacker-controlled issuer and link the existing OIDC identity (Apple or Azure) of the victim to an additional OIDC identity based on the ID token contents. The Auth server would then issue a valid user session (access and refresh tokens) at the AAL1 level to the attacker. This vulnerability is fixed in 2.185.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
使用欺骗进行的认证绕过
Source: CVE Program / CVE List V5
Vulnerability Title
Auth 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Auth是Supabase开源的一个用户认证与管理系统。 Supabase Auth 2.185.0之前版本存在安全漏洞，该漏洞源于启用Apple或Azure提供程序时，攻击者可使用特制的ID令牌为任意用户颁发会话，可能导致攻击者获得有效用户会话。
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
supabase auth < 2.185.0 -

II. Public POCs for CVE-2026-31813

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III. Intelligence Information for CVE-2026-31813

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Vendor Advisories for CVE-2026-31813 (1)

IV. Related Vulnerabilities

Same product: auth
Same vendor: supabase
Same weakness: CWE-290

V. Comments for CVE-2026-31813

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