CVE-2026-55652: Wekan: Header-login IP allowlist bypass via X-Forwarded-For spoofing in Wekan allows unauthenticated full account takeover (incl. admin)

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-07-15 · updated 2026-07-17
Weakness: CWE-287

Description

Wekan is open source kanban built with Meteor. Prior to 9.46, header-login with HEADER_LOGIN_TRUSTED_IPS uses getRequestIp() in server/lib/headerLoginAuth.js to trust the client-supplied X-Forwarded-For header before the real socket address, allowing an unauthenticated attacker to send HEADER_LOGIN_ID for any username and receive a meteor_login_token session, including for admin. This issue is fixed in version 9.46.

Affected products

WeKan: before 9.46

References

https://github.com/wekan/wekan/commit/b181889a565254bc9bf79379a34fc7f617ccda28
https://github.com/wekan/wekan/releases/tag/v9.46
https://github.com/wekan/wekan/security/advisories/GHSA-jggc-qvfc-jr6x
https://github.com/wekan/wekan/security/advisories/GHSA-jggc-qvfc-jr6x

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