CVE-2026-2709— busy Callback app.js redirect
Quick assessment
Affected
n/a busy
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.
Busy是Busy开源的一个社交网络系统。 Busy 2.5.5及之前版本存在输入验证错误漏洞，该漏洞源于对文件source-code/busy-master/src/server/app.js中参数state的错误操作，可能导致开放重定向。
Possible ATT&CK Techniques 1 AI
T1189 · Drive-by Compromise
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I. Basic Information for CVE-2026-2709
Vulnerability Information
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Vulnerability Title
busy Callback app.js redirect
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw has been found in busy up to 2.5.5. The affected element is an unknown function of the file source-code/busy-master/src/server/app.js of the component Callback Handler. Executing a manipulation of the argument state can lead to open redirect. It is possible to launch the attack remotely. The exploit has been published and may be used. The project was informed of the problem early through an issue report but has not responded yet.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
指向未可信站点的URL重定向(开放重定向)
Source: CVE Program / CVE List V5
Vulnerability Title
Busy 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Busy是Busy开源的一个社交网络系统。 Busy 2.5.5及之前版本存在输入验证错误漏洞，该漏洞源于对文件source-code/busy-master/src/server/app.js中参数state的错误操作，可能导致开放重定向。
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 |
|---|---|---|---|---|
| - | busy | 2.5.0 | - |
|
II. Public POCs for CVE-2026-2709
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · n/a · 2026-02-19 · 9 CVEs total
| CVE-2025-69725 | 4.7 MEDIUM | chi 安全漏洞 |
| CVE-2026-2704 | 4.3 MEDIUM | Open Babel CIF File transform3d.cpp DescribeAsString out-of-bounds |
| CVE-2026-2705 | 4.3 MEDIUM | Open Babel MOL2 File atom.h SetFormalCharge out-of-bounds |
| CVE-2026-26744 | FormaLMS 安全漏洞 | |
| CVE-2025-55853 | SoftVision webPDF 安全漏洞 | |
| CVE-2025-67304 | RUCKUS Network Director 安全漏洞 | |
| CVE-2025-67305 | RUCKUS Network Director 安全漏洞 | |
| CVE-2025-69674 | CDATA FD614GS3-R850 安全漏洞 |
IV. Related Vulnerabilities
Same weakness: CWE-601
-
CVE-2026-55252
OpenRun: Redirect URL validation bypass using //host paths -
CVE-2026-83589
Oauth-proxy: open redirect via /\ and /\t bypass in post-log -
CVE-2026-102090
Kiteworks Core content injection -
CVE-2026-103048
Open Redirect in Special:Book -
CVE-2026-53989
Dockhand < 1.0.36 Open Redirect via OIDC Initiation Endpoint
V. Comments for CVE-2026-2709
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