CVE-2026-33476

Q: How do I fix CVE-2026-33476?

Upgrade siyuan to 3.6.2 or later.

Q: Is CVE-2026-33476 being actively exploited?

Not that we know of. CVE-2026-33476 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 3.3% is the estimated probability that it will be exploited in the next 30 days. That is higher than 87% of all scored CVEs.

Q: How severe is CVE-2026-33476?

CVE-2026-33476 has a CVSS v3 base score of 7.5, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

Q: What does CVE-2026-33476 affect?

Published advisories record a fix for siyuan (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

HIGHEPSS 87th pctl

7.5

CVSS v3

NVD

Description

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.

CWE-22Path Traversal CWE-73External Control of File Name or Path

How to fix

Remediation Available

siyuanNVD

Affected:< 3.6.2Fixed in:3.6.2CVE-2026-33476derived from NVD

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Exploit Intelligence

3.26%probability of exploitation in 30 days

87thpercentile

Elevated risk: more likely to be exploited than 87% of all known CVEs.

References

Patch1

github.com

Exploit1

github.com

Related Vulnerabilities

Other CWE-22 (Path Traversal) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-23897	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2023-32315	High	8.6	100%	KEV	Fix
CVE-2022-29464	Critical	9.8	100%	KEV + Ransom	-
CVE-2021-26086	Medium	5.3	100%	KEV	Fix
CVE-2021-22005	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2020-5902	Critical	9.8	100%	KEV + Ransom	Fix

Common questions

How do I fix CVE-2026-33476?

Upgrade siyuan to 3.6.2 or later.

Is CVE-2026-33476 being actively exploited?

Not that we know of. CVE-2026-33476 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 3.3% is the estimated probability that it will be exploited in the next 30 days. That is higher than 87% of all scored CVEs.

How severe is CVE-2026-33476?

CVE-2026-33476 has a CVSS v3 base score of 7.5, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2026-33476 affect?

Published advisories record a fix for siyuan (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

Embed a live status badge for CVE-2026-33476

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-03-23.