Pocket ID up to 2.11.x Token Model email_verification_token.go SendEmailVerification/UpdateUser/VerifyEmail improper authentication

Summaryinfo

A vulnerability was found in Pocket ID up to 2.11.x and classified as critical. Affected by this vulnerability is the function SendEmailVerification/UpdateUser/VerifyEmail of the file backend/internal/model/email_verification_token.go of the component Token Model. Such manipulation leads to improper authentication. This vulnerability is listed as CVE-2026-115770. The attack may be performed from remote. There is no available exploit. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Pocket ID up to 2.11.x. It has been rated as critical. Affected by this issue is the function SendEmailVerification/UpdateUser/VerifyEmail of the file backend/internal/model/email_verification_token.go of the component Token Model. The manipulation with an unknown input leads to a improper authentication vulnerability. Using CWE to declare the problem leads to CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Pocket ID is an OIDC provider that allows users to authenticate with their passkeys to services. From 2.2.0 until 2.12.0, SendEmailVerification uses the token model in backend/internal/model/email_verification_token.go to bind an email-verification token only to the user's identifier, while UpdateUser can change the account email without invalidating the outstanding token and VerifyEmail marks the current address as verified. An ordinary user can request a token for an address they control, change the account to an arbitrary unused address, and redeem the old token so Pocket ID publishes the new address with email_verified set to true. The default affected configuration uses emailsVerified=false and allowOwnAccountEdit=true; the target address must not already belong to another Pocket ID user. A relying application that trusts a verified email for automatic account matching or provisioning can link the attacker's identity to another user's account, while applications that rely exclusively on the stable OIDC sub claim are not affected by that downstream consequence. This issue is fixed in version 2.12.0.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-115770 since 10/23/2026. The exploitation is known to be easy. The attack may be launched remotely. There are known technical details, but no exploit is available.

Upgrading to version 2.12.0 eliminates this vulnerability.

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Name

• Pocket ID

Version

• 2.0
• 2.1
• 2.2
• 2.3
• 2.4
• 2.5
• 2.6
• 2.7
• 2.8
• 2.9
• 2.10
• 2.11

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