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NVD CRITICAL: CVE-2026-39912 — V2Board 1.6.1 through 1.7.4 and Xboard through 0.1.9 expose authentication token...

·Source: NIST NVD

Updated:

Executive Summary

V2Board 1.6.1 through 1.7.4 and Xboard through 0.1.9 expose authentication tokens in HTTP response bodies of the loginWithMailLink endpoint when the login_with_mail_link_enable feature is active. Unauthenticated attackers can POST to the loginWithMailLink endpoint with a known email address to receive the full authentication URL in the response, then exchange the token at the token2Login endpoint

Analysis

V2Board 1.6.1 through 1.7.4 and Xboard through 0.1.9 expose authentication tokens in HTTP response bodies of the loginWithMailLink endpoint when the login_with_mail_link_enable feature is active. Unauthenticated attackers can POST to the loginWithMailLink endpoint with a known email address to receive the full authentication URL in the response, then exchange the token at the token2Login endpoint to obtain a valid bearer token with complete account access including admin privileges. CVSS Score: 9.1. Published: 2026-04-09T19:16:25.920.

Indicators of Compromise (1)

CVE (1)
CVE-2026-39912
NVDMITRE CVE
Source Attribution

Originally published by NIST NVD on Apr 9, 2026. Verified by: NIST.

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