CVE-2026-73054 json
SiYuan before v3.7.4 Authentication Bypass via WebSocket
published 2026-08-15 2 mo ago modified 2026-11-05 3 d ago also GHSA-c8w8-3pqp-wr83 , GO-2026-6831 , EUVD-2026-59803
- cvss
- 7.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 35%
- public exploits
- 0
- none known
Summary
SiYuan versions before v3.7.4 contain an authentication bypass vulnerability in the WebSocket endpoint caused by differential parsing of query parameters between authentication exemption and session quarantine checks. Unauthenticated attackers can craft a malicious WebSocket URI with duplicated query parameters to bypass access auth code validation and receive the live kernel event stream including document identifiers, titles, and operation logs.
Patch / fix
- go github.com/siyuan-note/siyuan/kernel 0.0.0-20260731131820-67bc300b6ea6
- siyuan-note siyuan 3.7.4
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 2 mo ago
Exploit prediction
0.41% chance of exploitation in the next 30 days, higher than 35% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/siyuan-note/siyuan/security/advisories/GHSA-c8w8-3pqp-wr83 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 8.7 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N |
| CNA | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
| CNA | 4.0 | 8.7 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
| GitHub | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| go | github.com/siyuan-note/siyuan/kernel | <0.0.0-20260731131820-67bc300b6ea6 |
0.0.0-20260731131820-67bc300b6ea6 |
Affected products
- siyuan-note siyuan
Classification
- Weakness
-
- CWE-287 Improper Authentication
References
-
github.com
/siyuan-note/siyuan/commit/67bc300b6ea6650d99dae55c827aeced419c8ac4
web
-
github.com
/siyuan-note/siyuan/security/advisories/GHSA-c8w8-3pqp-wr83
vendor-advisory, exploit, web, advisory
-
vulncheck.com
/advisories/siyuan-before-authentication-bypass-via-websocket
third-party-advisory, web
-
nvd.nist.gov
/vuln/detail/CVE-2026-73054
advisory
-
github.com
/siyuan-note/siyuan
package
-
github.com
/siyuan-note/siyuan/releases/tag/v3.7.4-alpha.4
web
Sources
- CVE List CVE-2026-73054
- GitHub Advisory GHSA-c8w8-3pqp-wr83
- NVD CVE-2026-73054
- OSV GO-2026-6831
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