CVE-2026-122139— blueprintUE Self-Hosted Edition before 4.3.3 Account Enumeration via Password Reset

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 4.3.3 版本之前的 blueprintUE 自托管版中，ForgotPasswordMiddleware.php 文件存在一个账户枚举漏洞，允许未认证的攻击者识别已注册的电子邮件地址。攻击者可以通过比较不同提交邮箱所对应的密码重置重定向目标来探测账户是否存在，且失败的查询请求从未受到速率限制，从而使得攻击者能够进行无限制的枚举尝试。

CVSS 5.3 · Medium Updated Nov 05, 2026

Possible ATT&CK Techniques 1 AI

T1087 · Account Discovery

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Vulnerability Information

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Vulnerability Title

blueprintUE Self-Hosted Edition before 4.3.3 Account Enumeration via Password Reset

Source: CVE Program / CVE List V5

Vulnerability Description

blueprintUE Self-Hosted Edition before 4.3.3 contains an account enumeration vulnerability in ForgotPasswordMiddleware.php that allows unauthenticated attackers to identify registered email addresses. Attackers can compare password reset redirect targets for submitted emails, and failed lookups are never rate-limited, enabling unlimited enumeration attempts.

Source: CVE Program / CVE List V5

CVSS Information

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

Source: CVE Program / CVE List V5

Vulnerability Type

响应差异性信息暴露

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
blueprintue	blueprintue-self-hosted-edition	0 ~ 4.3.3	-

II. Public POCs for CVE-2026-122139

#	POC Description	Source Link	Shenlong Link

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No public POC found.

III. Intelligence Information for CVE-2026-122139

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Other References for CVE-2026-122139 (6)

https://github.com/blueprintue/blueprintue-self-hosted-edition/commit/45832742182a6c4438a0d58de95ba9c7686851f2 patch
https://github.com/blueprintue/blueprintue-self-hosted-edition/pull/265 patch issue-tracking
https://github.com/blueprintue/blueprintue-self-hosted-edition/blob/v4.3.2/app/middlewares/ForgotPasswordMiddleware.php#L130-L157 technical-description
https://github.com/blueprintue/blueprintue-self-hosted-edition/security/advisories/GHSA-fwgq-c3c6-p67j vendor-advisory
https://github.com/blueprintue/blueprintue-self-hosted-edition/releases/tag/v4.3.3 release-notes
https://www.vulncheck.com/advisories/blueprintue-self-hosted-edition-before-4.3.3-account-enumeration-via-password-reset third-party-advisory

https://www.cve.org/CVERecord?id=CVE-2026-122139

IV. Related Vulnerabilities

Same product: blueprintue-self-hosted-edition

Same vendor: blueprintue

Same weakness: CWE-204