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CVE-2026-49996— securedrop-proxy origin limitation can be bypassed with redirects

Quick assessment

Affected
freedomofpress securedrop-client
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.

SecureDrop Client 是专为记者设计的桌面应用程序，用于在 SecureDrop Workstation 上安全地与线人沟通并处理提交内容。在 1.3.1 版本之前，恶意的 SecureDrop 服务器可以通过响应跨域重定向来绕过 securedrop-proxy 的源限制。SecureDrop 服务器本身具备多层内置加固措施，且为一台专用物理设备，仅通过 Tor 隐藏服务向互联网暴露线人和记者接口，可选地还通过另一个 Tor 隐藏服务进行远程 SSH 访问。新闻编辑室的 SecureDrop Wor

CVSS 3.7 · Low EPSS 0.24% · P15

Affected Version Matrix 1

VendorProduct Version RangeStatus
freedomofpress securedrop-client < 1.3.1 affected
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I. Basic Information for CVE-2026-49996

Vulnerability Information
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Vulnerability Title
securedrop-proxy origin limitation can be bypassed with redirects
Source: CVE Program / CVE List V5
Vulnerability Description
SecureDrop Client is a desktop app for journalists to securely communicate with sources and handle submissions on the SecureDrop Workstation. Prior to version 1.3.1, a malicious SecureDrop Server could bypass securedrop-proxy's origin limitation by responding with cross-origin redirects. SecureDrop Server itself has multiple layers of built-in hardening, and is a dedicated physical machine exposed on the internet only via Tor hidden services for the Source and Journalist interfaces, and optionally via remote SSH access over another Tor hidden service. A newsroom's SecureDrop Workstation communicates only with its own dedicated SecureDrop Server. Version 1.3.1 fixes the issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/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

Affected Products

Vendor Product Affected Versions CPE Subscribe
freedomofpress securedrop-client < 1.3.1 -

II. Public POCs for CVE-2026-49996

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III. Intelligence Information for CVE-2026-49996

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Patches & Fixes for CVE-2026-49996 (1)

Vendor Advisories for CVE-2026-49996 (1)

IV. Related Vulnerabilities

Same product: securedrop-client
Same vendor: freedomofpress
Same weakness: CWE-601

V. Comments for CVE-2026-49996

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