CVE-2026-33670: b3log siyuan Path Traversal
CVSS: 9.8v3.1CriticalAnalyzed
AliasesGHSA-xmw9-6r43-x9wwGO-2026-4843
Published 26-03-2026Last modified 30-03-2026
Vulnerability summary
CVE-2026-33670 is a critical (CVSS 9.8) Path Traversal vulnerability in b3log siyuan. EPSS estimates a 0.62% chance of exploitation in the next 30 days, higher than 49% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)EPSS score
0.62%
0%100%
Low · -0.04 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github
Advisory lineage
Upstream 0 · Downstream 2 · Related 2Timeline
- 26-03-2026PublishedVulnerability first disclosed.
- 30-03-2026Last modifiedVulnerability information updated.
Description
SiYuan is a personal knowledge management system. Prior to version 3.6.2, the /api/file/readDir interface was used to traverse and retrieve the file names of all documents under a notebook. Version 3.6.2 patches the issue.
CVSS metrics
3 scores · 3 sources · 1 versionCritical 9.8Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HSources3 sources · 7.5–9.8
- OSV · GoEcosystem advisory · calculated9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- NVDNIST7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:NDiffers
EPSS trend
Probability
0.62%
Chance of exploitation in the next 30 days
Percentile
49%
Versus all other CVEs
30-day change
-0.04 pp
From 0.66% on 20-09-2026
20-09-202620-10-2026
EPSS score0.62%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundSiyuan
Maturity: poc
Weaknesses
CWE · root causeAffected systems
B3log1 product
- siyuan< 3.6.2
Github.com/siyuan-note/siyuan1 product
- kernel≤ 0.0.0-20260317012524-fe4523fff2c8 | All versions (No fix recorded)
Siyuan-note1 product
- siyuan< 3.6.2
3 vendors · 3 products
References
3 links- github.com/siyuan-note/siyuan/security/advisories/GHSA-xmw9-6r43-x9wwX Refsource CONFIRMWEBAdvisoryExploitVendor Advisory
