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.
Metrics
Affected Vendors & Products
References
History
Fri, 28 Aug 2026 06:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
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Sun, 23 Aug 2026 17:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Siyuan
Siyuan siyuan |
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| Vendors & Products |
Siyuan
Siyuan siyuan |
Sat, 22 Aug 2026 12:45:00 +0000
| Type | Values Removed | Values Added |
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| 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. | |
| Title | SiYuan before v3.8.0 Secret Exfiltration via http_request URL | |
| First Time appeared |
B3log
B3log siyuan |
|
| Weaknesses | CWE-201 | |
| CPEs | cpe:2.3:a:b3log:siyuan:*:*:*:*:*:*:*:* | |
| Vendors & Products |
B3log
B3log siyuan |
|
| References |
| |
| Metrics |
cvssV3_1
|
Status: PUBLISHED
Assigner: VulnCheck
Published: 2026-08-22T12:26:35.098Z
Updated: 2026-08-26T16:16:52.009Z
Reserved: 2026-07-07T14:39:14.063Z
Link: CVE-2026-59809
Updated: 2026-08-26T15:55:27.332Z
Status : Deferred
Published: 2026-08-22T13:16:39.127
Modified: 2026-08-26T17:17:08.580
Link: CVE-2026-59809
No data.