CVE-2026-118691 (CVSS 3.7)

Description

xianyu-auto-reply-fix through 2.0.7 contains a missing authorization vulnerability in the POST /send-message endpoint that allows unauthenticated attackers to send messages from other users' accounts using publicly known default API secrets. Attackers can supply the hard-coded api_key and another user's cookie_id, plus chosen chat_id, to_user_id and message values, to send arbitrary Xianyu messages to buyers from that merchant account.

Is your site exposed to CVE-2026-118691?

Run a free security scan — no signup, results in seconds.

CVSS v3.1 Score

3.7

LOW

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

Weakness Type (CWE)

CWE-1188 CWE-1188

References

Other References

https://github.com/GuDong2003/xianyu-auto-reply-fix https://github.com/GuDong2003/xianyu-auto-reply-fix/blob/v2.0.7/db_manager.py#L1011 https://github.com/GuDong2003/xianyu-auto-reply-fix/blob/v2.0.7/reply_server.py#L2347-L2475 https://github.com/GuDong2003/xianyu-auto-reply-fix/commit/999cfe61c401322d9893eb81ad1a76beabba6cfb https://github.com/GuDong2003/xianyu-auto-reply-fix/issues/116 https://www.vulncheck.com/advisories/xianyu-auto-reply-fix-through-2.0.7-unauthenticated-message-sending-via-send-message

Frequently Asked Questions

What is CVE-2026-118691? +

xianyu-auto-reply-fix through 2.0.7 contains a missing authorization vulnerability in the POST /send-message endpoint that allows unauthenticated attackers to send messages from other users' accounts using publicly known default API secrets. Attackers can supply the hard-coded api_key and another user's cookie_id, plus chosen chat_id, to_user_id and message values, to send arbitrary Xianyu messages to buyers from that merchant account. It has a CVSS v3.1 base score of 3.7 (LOW).

How severe is CVE-2026-118691? +

CVE-2026-118691 has a CVSS v3.1 score of 3.7 out of 10, rated LOW. This is a low-severity vulnerability with limited impact.

How do I check if I'm vulnerable to CVE-2026-118691? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

Related Vulnerabilities

CVE-2026-6866

CWE-1188 Initialization of a Resource with an Insecure Default vulnerability exists that could cause unauthorized disclosure of sensitive information when …

CVE-2024-8313

An Exposure of Sensitive System Information to an Unauthorized Control Sphere and Initialization of a Resource with an Insecure Default …

CVE-2024-5801

Enabled IP Forwarding feature in B&R Automation Runtime versions before 6.0.2 may allow remote attack-ers to compromise network security by …

CVE-2025-7353

A security issue exists due to the web-based debugger agent enabled on Rockwell Automation ControlLogix® Ethernet Modules. If a specific …

CVE-2024-51758

Filament is a collection of full-stack components for accelerated Laravel development. All Filament features that interact with storage use the …

CVE-2026-9039

A configuration weakness in the device’s remote management service allows an authenticated session to be established over a communication channel …

CVE-2026-118691