Pocketbase: Account pre-hijacking via OAuth2 unverfied->verified autolinking upgrade_CVE-2026-44166

6.1 / 10

MEDIUM

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:H/VA:L/SC:N/SI:N/SA:N

Description

Pocketbase is an open source web backend written in go. Prior to 0.22.42 and 0.37.4, in some situations, if an attacker knows the email address of the victim they can create and link an unverified PocketBase user in advance by authenticating with one of the OAuth2 app providers, e.g. "A". When the victim gets invited or decides to sign up to your app on their own with provider "B" (PocketBase OAuth2 auth requires to be with a different provider because we don't allow multiple OAuth2 accounts from the same provider to be associated to a single PocketBase user), the user created previously by the attacker will be autolinked, upgraded to "verified" and its old password reset. This vulnerability is fixed in 0.22.42 and 0.37.4.

Basic Information

ID CVE-2026-44166

Source GitHub_M

Published May 12, 2026 at 17:16

Affected Product

Vendor pocketbase

Product pocketbase

Version < 0.22.42

Affected Versions pocketbase pocketbase < 0.22.42
pocketbase pocketbase >= 0.30.0, < 0.37.4

CWE Classification

CWE-287

References

github.com /pocketbase/pocketbase/security/advisories/GHSA-pq7p-mc74-g65w

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    "published": "2026-05-12T17:16:59.613Z",
    "modified": "2026-05-12T17:16:59.613Z",
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