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CVE-2026-40585— blueprintUE: Password Reset Tokens Have No Expiry Window

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.

blueprintUE self-hosted edition是blueprintUE开源的一个自托管的数据建模与可视化工具。 blueprintUE self-hosted edition 4.2.0之前版本存在安全漏洞，该漏洞源于密码重置令牌生成后，findUserIDFromEmailAndToken函数仅查询匹配的电子邮件和密码重置令牌对，未检查password_reset_at时间戳是否超过任何最大窗口，可能导致生成的重置令牌在明确使用或被后续重置请求覆盖之前无限期有效。

CVSS 7.4 · High EPSS 0.32% · P23

Possible ATT&CK Techniques 1 AI

T1528 · Steal Application Access Token
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I. Basic Information for CVE-2026-40585

Vulnerability Information
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Vulnerability Title
blueprintUE: Password Reset Tokens Have No Expiry Window
Source: CVE Program / CVE List V5
Vulnerability Description
blueprintUE is a tool to help Unreal Engine developers. Prior to 4.2.0, when a password reset is initiated, a 128-character CSPRNG token is generated and stored alongside a password_reset_at timestamp. However, the token redemption function findUserIDFromEmailAndToken() queries only for a matching email + password_reset token pair — it does not check whether the password_reset_at timestamp has elapsed any maximum window. A generated reset token is valid indefinitely until it is explicitly consumed or overwritten by a subsequent reset request. This vulnerability is fixed in 4.2.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
忘记口令恢复机制弱
Source: CVE Program / CVE List V5
Vulnerability Title
blueprintUE self-hosted edition 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
blueprintUE self-hosted edition是blueprintUE开源的一个自托管的数据建模与可视化工具。 blueprintUE self-hosted edition 4.2.0之前版本存在安全漏洞，该漏洞源于密码重置令牌生成后，findUserIDFromEmailAndToken函数仅查询匹配的电子邮件和密码重置令牌对，未检查password_reset_at时间戳是否超过任何最大窗口，可能导致生成的重置令牌在明确使用或被后续重置请求覆盖之前无限期有效。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
blueprintue blueprintue-self-hosted-edition < 4.2.0 -

II. Public POCs for CVE-2026-40585

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III. Intelligence Information for CVE-2026-40585

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Vendor Advisories for CVE-2026-40585 (1)

Same Patch Batch · blueprintue · 2026-04-21 · 4 CVEs total

CVE-2026-40588 8.1 HIGH blueprintUE: Authenticated Password Change Does Not Verify Current Password
CVE-2026-40586 7.5 HIGH blueprintUE: Login Endpoint Has No Rate Limiting, Lockout, or Brute-Force Protection
CVE-2026-40587 6.5 MEDIUM blueprintUE: Active Sessions Are Not Invalidated After Password Change or Reset

IV. Related Vulnerabilities

Same product: blueprintue-self-hosted-edition
Same vendor: blueprintue
Same weakness: CWE-640

V. Comments for CVE-2026-40585

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