CVE-2026-121735— blueprintUE Self-Hosted Edition before 4.3.4 Non-Expiring Account Confirmation Tokens

Quick assessment

Affected

blueprintue blueprintue-self-hosted-edition

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 4.3.4 版本之前的 BlueprintUE 自托管版中存在一个会话过期机制不足的漏洞。由于方法忽略了字段，攻击者可以利用过期的令牌来确认账户。若攻击者从被入侵的邮箱、备份文件或转发邮件中获取了旧的确认链接，即可激活未确认的账户，并绕过系统对未确认账户的自动清理任务。

CVSS 3.7 · Low Updated Nov 04, 2026

Possible ATT&CK Techniques 2 AI

T1552 · Unsecured Credentials T1190 · Exploit Public-Facing Application

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Vulnerability Information

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Vulnerability Title

blueprintUE Self-Hosted Edition before 4.3.4 Non-Expiring Account Confirmation Tokens

Source: CVE Program / CVE List V5

Vulnerability Description

blueprintUE self-hosted edition before 4.3.4 contains an insufficient session expiration vulnerability that allows attackers to confirm accounts using stale tokens because UserModel::findUserIDWithConfirmedToken ignores confirmed_sent_at. Attackers who obtain an old confirmation link from a compromised mailbox, backup, or forwarded mail can activate unconfirmed accounts and evade the unconfirmed-account cleanup job.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

Source: CVE Program / CVE List V5

Vulnerability Type

不充分的会话过期机制

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
blueprintue	blueprintue-self-hosted-edition	0 ~ 4.3.4	-

II. Public POCs for CVE-2026-121735

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2026-121735

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Other References for CVE-2026-121735 (7)

https://github.com/blueprintue/blueprintue-self-hosted-edition product
https://github.com/blueprintue/blueprintue-self-hosted-edition/blob/v4.3.3/app/models/UserModel.php#L361-L368 technical-description
https://github.com/blueprintue/blueprintue-self-hosted-edition/pull/266 patch issue-tracking
https://github.com/blueprintue/blueprintue-self-hosted-edition/commit/8bba1615bf76b144ac5cd72637c243490f08bc37 patch
https://github.com/blueprintue/blueprintue-self-hosted-edition/releases/tag/v4.3.4 release-notes
https://github.com/blueprintue/blueprintue-self-hosted-edition/security/advisories/GHSA-qp6g-7v4v-33r9 vendor-advisory
https://www.vulncheck.com/advisories/blueprintue-self-hosted-edition-before-4.3.4-non-expiring-account-confirmation-tokens third-party-advisory

https://www.cve.org/CVERecord?id=CVE-2026-121735

IV. Related Vulnerabilities

Same product: blueprintue-self-hosted-edition

Same vendor: blueprintue

Same weakness: CWE-613