What is GHSA-gfvp-wqxw-g8qp?

GHSA-gfvp-wqxw-g8qp is a security advisory published by GitHub Security Advisories with Critical severity. SiYuan 2.1.0 before 3.8.9 contains a flaw where the loginAuth CAPTCHA challenge lives in a signed...

Which CVE IDs does GHSA-gfvp-wqxw-g8qp cover?

GHSA-gfvp-wqxw-g8qp covers the following CVE IDs: CVE-2026-126265. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-gfvp-wqxw-g8qp?

GHSA-gfvp-wqxw-g8qp has a CVSS v3 base score of 7.4, published by GitHub Security Advisories.

GHSA-gfvp-wqxw-g8qpCriticalCVSS 7.4

SiYuan 2.1.0 before 3.8.9 contains a flaw where the loginAuth CAPTCHA challenge lives in a signed...

Vendor

GitHub Security Advisories

Published

November 13, 2026

Last Modified

November 13, 2026

🔗 CVE IDs covered (1)

CVE-2026-126265 →

📋 Description

SiYuan 2.1.0 before 3.8.9 contains a flaw where the loginAuth CAPTCHA challenge lives in a signed client-side cookie, allowing reuse of a solved challenge. Attackers can replay the original signed siyuan cookie with distinct wrong access codes to brute-force the code and gain an administrator session.

🔗 References (4)

https://github.com/siyuan-note/siyuan/security/advisories/GHSA-23g4-vqq8-5764
https://nvd.nist.gov/vuln/detail/CVE-2026-126265
https://www.vulncheck.com/advisories/siyuan-2.1.0-before-3.8.9-captcha-bypass-via-stale-login-cookie
https://github.com/advisories/GHSA-gfvp-wqxw-g8qp