What is GHSA-27jw-6xjf-hgxj?

GHSA-27jw-6xjf-hgxj is a security advisory published by GitHub Security Advisories with Medium severity. SiYuan before v3.8.0 interpolates secret placeholders into the destination URL parameter of the...

Which CVE IDs does GHSA-27jw-6xjf-hgxj cover?

GHSA-27jw-6xjf-hgxj covers the following CVE IDs: CVE-2026-59809. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-27jw-6xjf-hgxj?

GHSA-27jw-6xjf-hgxj has a CVSS v3 base score of 4.9, published by GitHub Security Advisories.

GHSA-27jw-6xjf-hgxjMediumCVSS 4.9

SiYuan before v3.8.0 interpolates secret placeholders into the destination URL parameter of the...

Vendor

GitHub Security Advisories

Published

August 22, 2026

Last Modified

August 22, 2026

🔗 CVE IDs covered (1)

CVE-2026-59809 →

📋 Description

SiYuan before v3.8.0 interpolates secret placeholders into the destination URL parameter of the http_request MCP tool, allowing attackers to exfiltrate stored secrets. An MCP client can craft a request with an attacker-controlled URL containing secret placeholders to send plaintext secret values to any public host without confirmation.

🔗 References (4)

https://github.com/siyuan-note/siyuan/security/advisories/GHSA-853m-gvvm-6rvx
https://nvd.nist.gov/vuln/detail/CVE-2026-59809
https://www.vulncheck.com/advisories/siyuan-before-secret-exfiltration-via-http-request-url
https://github.com/advisories/GHSA-27jw-6xjf-hgxj