NVD / CVE Program· CNA VulnCheck

CVE-2026-65607: SiYuan before v3.7.2 Path Traversal via /export/temp/

Noroxi assessment

Priority: Monitor (action score 28/100)

The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
Probability of exploitation in the next 30 days: 0.58% (FIRST EPSS).
Anyone who can reach it over the internet can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
Fixed version: siyuan-note siyuan 3.7.2.

Low priority for now. Upgrade to siyuan-note siyuan 3.7.2 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

SiYuan before v3.7.2 contains a path traversal vulnerability in the /export/temp/ short-circuit branch of the serveExport handler (kernel/server/serve.go). Unlike the main export branch, this branch joins the raw, percent-decoded request path with util.TempDir and serves the file without the IsSubPath or IsSensitivePath checks added in the earlier export-disclosure hardening (GHSA-6865-qjcf-286f). An authenticated attacker can send percent-encoded traversal sequences (e.g. /export/temp/%2e%2e/.../etc/passwd, where %2e%2e is decoded to '..') to read arbitrary files outside TempDir, including /etc/passwd, SSH keys (~/.ssh/*), and SiYuan workspace *.db and *.log files, bypassing the sensitive-file protection.

HighCVSS 7.1 · v4.0—No exploit Fix available

Path traversal

Published: Jul 23, 2026
Updated: Oct 24, 2026
EPSS: 0.5% · 47th percentile
CWE: CWE-22

Report tools

JSON

Action score

Monitor

Low priority for now.

CVSS: 28 / 40 · 7.1 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.5%

CISA SSVC decision

Exploitation: none
Automatable: no
Technical impact: partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD: —
CNA · VulnCheck: 7.1; NVD has not scored this yet; the score shown is the CNA’s.

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

Not in KEV: no record of exploitation in the wild
No public exploit code on record
A fix has been released

If any of these changes, we'll tell you in the daily email digest.

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

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Versions reported by the vendor

Affected version ranges reported by the assigning authority (VulnCheck). Independent of NVD's CPE analysis and usually ahead of it.

siyuan-note siyuan
- 3.7.2not affected
- before 3.7.2affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Ecosystem	Package	Affected range	Fix
Go	github.com/siyuan-note/siyuan/kernel	before 0.0.0-20260510110132-b763d787d1f2	0.0.0-20260510110132-b763d787d1f2

Same product

siyuan-note: all records

Other highest-scoring records for the same primary product.

CVE-2026-66012SiYuan before v3.7.2 Unauthenticated Administrator Takeover via MCP
40Plan
CVE-2026-72811SiYuan before v3.7.4 SQL Injection via backlink search
39Monitor
CVE-2026-69085SiYuan before v3.7.3 SQL Injection via searchDocs
39Monitor

Published before and after this one in the same product

← EarlierCVE-2026-65606Jul 23, 2026 · SiYuan before v3.7.2 Cross-Site Scripting to RCE
37Monitor
← EarlierCVE-2026-65605Jul 23, 2026 · SiYuan before v3.7.2 Stored XSS to RCE via Attribute View
37Monitor
Later →CVE-2026-66394Jul 27, 2026 · SiYuan before v3.7.3 Stored and Reflected XSS via SVG Sanitizer Bypass
37Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
siyuan-note siyuan	3.7.2	Vendor (CNA)
Go:github.com/siyuan-note/siyuan/kernel	0.0.0-20260510110132-b763d787d1f2	Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

siyuan-note/siyuancommit bb481e1

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

sec-reexreporter

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

CVE-2026-7479825 days apartSiYuan kernel Path Traversal via database_clean MCP tool
37Monitor
CVE-2026-7708629 days apartSiYuan before v3.7.4 Path Traversal via packageName
37Monitor
CVE-2026-11617194 days apartSiYuan 3.5.4 before 3.8.7 Sensitive Path Bypass via Windows Extended-Length Prefix
34Monitor
CVE-2026-6908611 days apartSiYuan before v3.7.3 Path Traversal via unvalidated avID
33Monitor
CVE-2026-6008430 days apartSiYuan before v3.7.4 Arbitrary File Deletion via removeTemplate
33Monitor
CVE-2026-10063665 days apartSiYuan before v3.8.4 Path Traversal via exportBrowserHTML folder
33Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

CVE-2026-6858411 days apartSiYuan before v3.7.3 Authentication Bypass via Content Endpoints
36Monitor

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

Anyone who can reach it over the internet can trigger it.
A low-privileged account is enough.
No user action is required.
No special conditions are required; it is repeatable.

If successful

Confidentiality
Integrity
Availability

Attack vector: Network
Attack complexity: Low
Privileges required: Low
User interaction: None
Scope: X

Weakness class (CWE)

CWE-22 · Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/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

nvd-secondary

Root cause

A user-supplied file name is joined with the allowed directory, but the result is never checked to confirm it is still inside that directory.

The bug in code

The whole CWE-22 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

1const file = path.join(ROOT, req.query.name);
2res.sendFile(file);

Fixed

1const file = path.resolve(ROOT, req.query.name);
2if (!file.startsWith(ROOT + path.sep)) {
3  return res.sendStatus(400);
4}
5res.sendFile(file);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Attack patterns (CAPEC)

ATT&CK techniques

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Change log

Fix✗ → ✓Sep 28, 2026, 10:11 PM UTC

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References

github.com/siyuan-note/siyuan/commit/bb481e1290c4a34255652ede85a546504505d2a7

Show all references (2 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records