CVE-2026-33669: SiYuan is a personal knowledge management system

Q: How do I fix CVE-2026-33669?

siyuan: upgrade to 3.6.2. Exact commands for each OS are on this page.

Q: Is CVE-2026-33669 being exploited?

CVE-2026-33669 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-33669 affect?

CVE-2026-33669 affects siyuan. Severity is critical (CVSS 9.8). SiYuan is a personal knowledge management system. Prior to version 3.6.2, document IDs were retrieved via the /api/file/readDir interface, and then the /api/block/getChildBlocks interface was used to view the content of all documents. Versi

Q: How urgent is CVE-2026-33669?

Priority 55/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

CRITICAL 9.8REMOTEUPGRADE

CVE-2026-33669 is a critical-severity flaw (CVSS 9.8) affecting siyuan. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

SiYuan is a personal knowledge management system. Prior to version 3.6.2, document IDs were retrieved via the /api/file/readDir interface, and then the /api/block/getChildBlocks interface was used to view the content of all documents. Version 3.6.2 patches the issue.

Why this priority

Critical severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.5% (top 55%)
CISA exploited list	No
Weakness	CWE-125
Published	2026-03-26
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: b3log

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-03-26 22:16 UTCPublished CVE record published
2026-06-17 10:37 UTCUpdated Record last modified

b3log siyuan UPGRADE

Affected: < 3.6.2

Fixed in: 3.6.2

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy siyuan || rpm -q siyuan || siyuan --version

2. UPGRADE to 3.6.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade siyuan

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade siyuan

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Exact fixes by distribution

Go · github.com/siyuan-note/siyuan/kernel · NO FIX YET · vulnerable: <= 0.0.0-20260317012524-fe4523fff2c8 · source

Fedora ELN · fonttools · FIXED · 4.68.0-1.eln159 · FEDORA-2026-37fa4b964c · source

sudo dnf upgrade --advisory=FEDORA-2026-37fa4b964c

Fedora 46 · fonttools · FIXED · 4.68.0-1.fc46 · FEDORA-2026-65d6c01c75 · source

sudo dnf upgrade --advisory=FEDORA-2026-65d6c01c75

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Write-up: github.com/siyuan-note/siyuan/security/advisories/GHSA-34xj-66v3-6j83

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-33669?

siyuan: upgrade to 3.6.2. Exact commands for each OS are on this page.

Is CVE-2026-33669 being exploited?

CVE-2026-33669 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-33669 affect?

CVE-2026-33669 affects siyuan. Severity is critical (CVSS 9.8). SiYuan is a personal knowledge management system. Prior to version 3.6.2, document IDs were retrieved via the /api/file/readDir interface, and then the /api/block/getChildBlocks interface was used to view the content of all documents. Versi

How urgent is CVE-2026-33669?

Priority 55/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2026-39846 CRITICAL 9.0 UPGRADE SiYuan is a personal knowledge management system
CVE-2026-40922 MEDIUM 5.4 UPGRADE SiYuan is an open-source personal knowledge management system
CVE-2026-40322 CRITICAL 9.0 UPGRADE SiYuan is an open-source personal knowledge management system
CVE-2026-40318 HIGH 8.5 UPGRADE SiYuan is an open-source personal knowledge management system
CVE-2026-40259 HIGH 8.1 UPGRADE SiYuan is an open-source personal knowledge management system

References

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