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CVE-2026-40039— Pachno 1.0.6 Open Redirection via return_to Parameter

Quick assessment

Affected
Pachno Pachno
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.

Pachno是Pachno开源的一个用于协作的开源平台。 Pachno 1.0.6版本存在安全漏洞，该漏洞源于未验证return_to参数，可能导致开放重定向和钓鱼攻击。

CVSS 6.5 · Medium EPSS 0.40% · P32

Affected Version Matrix 1

VendorProduct Version RangeStatus
Pachno Pachno 1.0.6 affected
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I. Basic Information for CVE-2026-40039

Vulnerability Information
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Vulnerability Title
Pachno 1.0.6 Open Redirection via return_to Parameter
Source: CVE Program / CVE List V5
Vulnerability Description
Pachno 1.0.6 contains an open redirection vulnerability that allows attackers to redirect users to arbitrary external websites by manipulating the return_to parameter. Attackers can craft malicious login URLs with unvalidated return_to values to conduct phishing attacks and steal user credentials.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
使用基本弱点进行的认证绕过
Source: CVE Program / CVE List V5
Vulnerability Title
Pachno 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Pachno是Pachno开源的一个用于协作的开源平台。 Pachno 1.0.6版本存在安全漏洞，该漏洞源于未验证return_to参数，可能导致开放重定向和钓鱼攻击。
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
Pachno Pachno 1.0.6 -

II. Public POCs for CVE-2026-40039

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III. Intelligence Information for CVE-2026-40039

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Same Patch Batch · Pachno · 2026-04-13 · 6 CVEs total

CVE-2026-40042 9.8 CRITICAL Pachno 1.0.6 Wiki TextParser XML External Entity Injection
CVE-2026-40044 9.8 CRITICAL Pachno 1.0.6 FileCache Deserialization Remote Code Execution
CVE-2026-40040 8.8 HIGH Pachno 1.0.6 Unrestricted File Upload Remote Code Execution
CVE-2026-40038 7.2 HIGH Pachno 1.0.6 Stored Cross-Site Scripting via Multiple Parameters
CVE-2026-40041 4.3 MEDIUM Pachno 1.0.6 Cross-Site Request Forgery via State-Changing Endpoints

IV. Related Vulnerabilities

Same product: Pachno
Same vendor: Pachno
Same weakness: CWE-305

V. Comments for CVE-2026-40039

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