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CVE-2026-54166— Shelf Vulnerable to Server-Side Request Forgery (SSRF) via Asset CSV Import imageUrl Validation Bypass

Quick assessment

Affected
Shelf-nu shelf.nu
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.

Shelf 是一个用于追踪实物资产的平台。在 1.20.3 版本之前，拥有 权限的已认证用户可以通过“资产 CSV 内容导入”功能，触发服务器向攻击者控制的 URL 发起 HTTP 请求。 的校验逻辑可通过多种技术绕过，包括：使用图像扩展名后缀、与图像相关的路径关键字、域名子串匹配，以及重定向链。校验通过后，服务器会对提供的 URL 执行无限制的 请求。由此导致服务端请求伪造（SSRF）漏洞，使攻击者能够从应用程序的网络上下文中访问内部网络服务、云元数据端点以及任意外部主机。此外，响应体在大小校验之前被完全缓冲，从

CVSS 7.1 · High EPSS 0.25% · P17

Possible ATT&CK Techniques 1 AI

T1041 · Exfiltration Over C2 Channel

Affected Version Matrix 1

VendorProduct Version RangeStatus
Shelf-nu shelf.nu < 1.20.3 affected
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I. Basic Information for CVE-2026-54166

Vulnerability Information
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Vulnerability Title
Shelf Vulnerable to Server-Side Request Forgery (SSRF) via Asset CSV Import imageUrl Validation Bypass
Source: CVE Program / CVE List V5
Vulnerability Description
Shelf is a platform for tracking physical assets. Prior to version 1.20.3, authenticated users with the `asset:import` permission can trigger server-side HTTP requests to attacker-controlled URLs through the Asset CSV Content Import feature. The `imageUrl` validation logic can be bypassed through multiple techniques, including image-extension suffixes, image-related path keywords, domain substring matching, and redirect chains. After validation, the server performs an unrestricted `fetch()` request to the supplied URL. This results in a Server-Side Request Forgery (SSRF) vulnerability that allows attackers to reach internal network services, cloud metadata endpoints, and arbitrary external hosts from the application's network context. Additionally, response bodies are fully buffered before size validation, creating a potential memory exhaustion vector. Version 1.20.3 patches the issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Shelf-nu shelf.nu < 1.20.3 -

II. Public POCs for CVE-2026-54166

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III. Intelligence Information for CVE-2026-54166

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Vendor Advisories for CVE-2026-54166 (1)

IV. Related Vulnerabilities

Same product: shelf.nu
Same vendor: Shelf-nu
Same weakness: CWE-918

V. Comments for CVE-2026-54166

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