SiYuan is a personal knowledge management system. Prior to version 3.6.2, the Siyuan kernel exposes an unauthenticated file-serving endpoint under /appearance/*filepath. Due to improper path sanitization, attackers can perform directory traversal and read arbitrary files accessible to the server process. Authentication checks explicitly exclude this endpoint, allowing exploitation without valid credentials. Version 3.6.2 fixes this issue.
CVE-2026-33476
HIGHPre-NVD 7.57.5—Trending — 4 sources updated this weekElevated
EchelonGraph scoreMEDIUM confidence
Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-03-20. the CNA's CVSS baseline 7.5; sources differ by 0.0.
Triggered by: GitHub Security Advisory CVSS
Sources: cna:github_m, ghsa
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
- High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 3%CVSS: 7.5Exploit: Elevated riskExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 7.5
- EG Score
- 7.5(medium)
- EG Risk
- 65(Attend)EG Risk 65/100SSVC: Attend
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity75% × 45%Exploitation40% × 40%Automatability100% × 15%Action: Remediate soon — notable exploitation risk. - EPSS PROB
- 3%
- EPSS %ILE
- 87%
- KEV
- Not listed
Published
March 20, 2026
Last Modified
June 17, 2026
References (3)
- security-advisories@githubhttps://github.com/siyuan-note/siyuan/commit/009bb598b3beccc972aa5f1ed88b3b224326bf2a
- security-advisories@githubhttps://github.com/siyuan-note/siyuan/security/advisories/GHSA-hhgj-gg9h-rjp7
- 134c704f-9b21-4f2e-91b3-4a467353bcc0https://github.com/siyuan-note/siyuan/security/advisories/GHSA-hhgj-gg9h-rjp7
Patch Availability(1)
| Vendor / Ecosystem | Fixed in / Patch | Released | Source |
|---|---|---|---|
| go | github.com/siyuan-note/siyuan/kernel | — | ghsa |
Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.
Weakness Classification(2)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 4× in last 7d / 4× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-07-27 14:13 UTCEPSS rescore
- 2026-07-27 12:51 UTCEG score recompute
- 2026-07-27 12:51 UTCGHSA enrichment
- 2026-07-27 12:50 UTCOSV refresh
Publicly available exploits
(1 reference)Working exploit code is in the public domain. Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.
- Nucleihttp/cves/2026/CVE-2026-33476.yamlFirst seen Jan 1, 2026
SiYuan <= v3.6.1 - Path Traversal
Open source ↗
Related CVEs(same product + same CWE)
Same product
10 showngo:github.com/siyuan-note/siyuan/kernel
- CVE-2026-32938NVD 6.5EG 9.9CRITICAL
- CVE-2026-33670NVD 7.5EG 9.8CRITICAL
- CVE-2026-33669NVD 7.5EG 9.8CRITICAL
- CVE-2026-32767EG 9.8CRITICAL
- CVE-2024-55660EG 9.8CRITICAL
- CVE-2026-44588EG 9.4CRITICAL
- CVE-2026-32749EG 9.1CRITICAL
- CVE-2026-25539NVD 7.2EG 9.1CRITICAL
- CVE-2025-21609EG 9.1CRITICAL
- CVE-2026-45375EG 9.0CRITICAL
Frequently asked(5)
What is CVE-2026-33476?
CVE-2026-33476 is a high vulnerability published on March 20, 2026. SiYuan is a personal knowledge management system. Prior to version 3.6.2, the Siyuan kernel exposes an unauthenticated file-serving endpoint under /appearance/*filepath. Due to improper path sanitization, attackers can perform directory traversal and read arbitrary files accessible to the server…
When was CVE-2026-33476 disclosed?
CVE-2026-33476 was first published in the National Vulnerability Database on March 20, 2026, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-33476 actively exploited?
CVE-2026-33476 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 3% probability of exploitation in the next 30 days, which ranks it in the top 12.9% of all scored CVEs.
What is the CVSS score of CVE-2026-33476?
CVE-2026-33476 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-33476?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-33476, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-33476
Is Your Infrastructure Affected by CVE-2026-33476?
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