Is there a public exploit for CVE-2026-118691?

No public exploit for CVE-2026-118691 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-118691?

CVE-2026-118691 scores CVSS 6.3 (v4.0), rated medium. EPSS puts the chance of exploitation in the next 30 days at 0.31%.

What does CVE-2026-118691 affect?

CVE-2026-118691 affects GuDong2003 xianyu-auto-reply-fix.

6.3 Medium

xianyu-auto-reply-fix through 2.0.7 contains a missing authorization vulnerability in the POST /send-message endpoint that allows…

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 apikey and another user's cookieid, plus chosen chatid, touserid and message values, to send arbitrary Xianyu messages to buyers from that merchant account.

Assessment

CVSS: 6.3 (v4.0)
Severity: Medium
EPSS: 0.31% chance of exploitation in the next 30 days
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 28 October 2026
Last updated: 3 November 2026
Affected: GuDong2003 · xianyu-auto-reply-fix
Weakness: CWE-1188
Assigner: disclosure@vulncheck.com

CVSS vectorCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

At the source

References

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