🛡️ CVE-2026-39912
Description
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.
How this vulnerability can be exploited
This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity high, availability none.
Affected software
CVE-2026-39912 is recorded against 1 package.
- unknown
Timeline and source
Published on 9 April 2026 and last revised on 14 July 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.
References
chocapikk.com
github.com
github.com
github.com
github.com
github.com
github.com
www.vulncheck.com
Details
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Affected Packages
| Software | From version | Fixed in |
|---|---|---|
| unknown | — | — |
References
Similar Threats
- Unknown CVE-2022-0003
- Unknown CVE-2022-0303
- High CVE-2022-1206
- Unknown CVE-2022-0931
- Unknown CVE-2022-0094
More CVE 2026 advisories
Browse all of CVE 2026 in the advisory index.
Exploit Protection
Are you running the affected software?
CVE-2026-39912 carries CVSS 9.1 Critical rating. BotEraser checks your installation against this and other known CVE records, and blocks IPs associated with exploit activity.
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