CVE-2026-27949

Plane Exposes User Email (PII and part of credential) in GET Parameter

State: Published
Severity: 2.0 Low
Published: Apr 7, 2026
Updated: Apr 8, 2026
Reserved: Feb 25, 2026

Description

Plane is an an open-source project management tool. Prior to 1.3.0, a vulnerability was identified in Plane's authentication flow where a user's email address is included as a query parameter in the URL during error handling (e.g., when an invalid magic code is submitted). Transmitting personally identifiable information (PII) via GET request query strings is classified as an insecure design practice. The affected code path is located in the authentication utility module (packages/utils/src/auth.ts). This vulnerability is fixed in 1.3.0.

Scores

CVSS	Score	Vector	Source
3.1	2.0 Low	CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:N/A:N	GitHub_M

Weaknesses

CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
CWE-598 Use of GET Request Method With Sensitive Query Strings

Affected Products

Product	Versions
planemakeplane	< 1.3.0Affected

References

https://github.com/makeplane/plane/security/advisories/GHSA-8rvg-7w43-p2w2

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