CVE-2026-33669Disclosure(b3log / siyuan)

LOWCVSS 7.5 · HIGH

Exploit discussion active in current signal (2 latest mentions)

Immediate actions

Patch b3log siyuan systems immediately
Hunt for exploitation attempts and persistence artifacts
Increase monitoring for publicly documented tradecraft

Recommended action window: High priority (within 72h)

NVD description

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.

b3log CVEs Back to dashboard

2.0/ 10 priority

Sources & remediation

Exploit / PoC references

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

Weakness type (CWE)

CWE-125

Priority

LOW

Exploitation

NONE

PoC

YES

Patch

AVAILABLE

Momentum

STABLE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

siyuan

Threat summary

Public PoC is present in monitored signal
Patch or workaround signal is available
5 mentions across 2 observed days
Momentum state: stable

What's happening

PoC mentioned or linked in 1 signal
Patch or workaround mentioned in 2 signals
Technical details provided in 4 signals
Disclosure: 3 classified signals
Peaked 1d ago at 3 mentions (2026-03-26); latest day: 2
5 total mentions across 2 days

Affected systems

Vendors

b3log

Products

siyuan

Deep dive

Activity timeline5 mentions / 2d

Signal classification2 categories

Disclosure

360.0%

Patch

240.0%

Referenced assets5 URLs

By indicator

Classification over time

Date	Total	Labels

2026-03-26	3	Disclosure2Patch1
2026-03-27	2	Disclosure1Patch1

Full discourse5 posts

0day Signal@0dayPublishing194d
Disclosure
🚨 CVE-2026-33669: SiYuan has Arbitrary Document Re... Publishing service exposes document enumeration via /api/file/readDir + content exfiltration through /api/block/getChil... https://zerodaysignal.com/vulnerability/CVE-2026-33669 #netsec #vulnerability #CVE #sysadmin #zeroday
Post summary
SiYuan’s publishing service is vulnerable to CVE-2026-33669, allowing arbitrary document enumeration and content exfiltration through specific API endpoints, as detailed in the linked zero days report.
0000061
194 followersView on X
PulsePatch.io@pulsepatchio195d
Patch
An arbitrary document reading vulnerability (CVE-2026-33669) affects the `SiYuan` publishing service. Review configurations to restrict access. #SiYuan #InfoSec #Vulnerability https://www.pulsepatch.io/posts/cve-2026-33669-siyuan-arbitrary-document-reading
Post summary
The text announces CVE‑2026‑33669 as an arbitrary document reading flaw in SiYuan and recommends restricting access configurations as a mitigation.
0000028
6 followersView on X
The Hacker Wire@TheHackerWire195d
Disclosure
🔴 CVE-2026-33669 - Critical 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... https://www.thehackerwire.com/vulnerability/CVE-2026-33669/ https://t.co/Z6zCortdPs
Post summary
A critical CVE-2026-33669 was disclosed for SiYuan, highlighting that document IDs were exposed via the /api/file/readDir and /api/block/getChildBlocks interfaces prior to the 3.6.2 update.
0000043
163 followersView on X
CVEFind.com@CveFindCom195d
Patch
[CVE-2026-33669: CRITICAL] Update to SiYuan version 3.6.2 for improved cyber security! Prior versions had a vulnerability allowing access to document IDs and content. Patched in the latest release.#cve,CVE-2026-33669,#cybersecurity https://cvefind.com/CVE-2026-33669
Post summary
The CVE-2026-33669 vulnerability exposed document IDs and content in earlier SiYuan versions, but the issue has been patched in release 3.6.2, with no evidence of active exploitation or PoC.
0000037
617 followersView on X
CVE@CVEnew195d
Disclosure
CVE-2026-33669 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/get… https://www.cve.org/CVERecord?id=CVE-2026-33669
Post summary
The text merely discloses that SiYuan versions prior to 3.6.2 allow document IDs to be retrieved through specific API endpoints, with no evidence of a Proof of Concept, exploit code, or active exploitation.
0000048
56.9K followersView on X

CPE platform detail1 entries

Part:

Vendor:

Product:

Version:

Target SW:

Target HW:

1 of 1 entries

Part	Vendor	Product	Version	Target SW	Target HW
App	b3log	siyuan	-	-	-

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Back to dashboard b3log CVEs siyuan vulnerabilities

What researchers are saying

CVE-2026-33669

0day Signal@0dayPublishingDisclosure

SiYuan’s publishing service is vulnerable to CVE-2026-33669, allowing arbitrary document enumeration and content exfiltration through specific API endpoints, as detailed in the linked zero days report.

PulsePatch.io@pulsepatchioPatch

The text announces CVE‑2026‑33669 as an arbitrary document reading flaw in SiYuan and recommends restricting access configurations as a mitigation.

The Hacker Wire@TheHackerWireDisclosure

A critical CVE-2026-33669 was disclosed for SiYuan, highlighting that document IDs were exposed via the /api/file/readDir and /api/block/getChildBlocks interfaces prior to the 3.6.2 update.

CVEFind.com@CveFindComPatch

The CVE-2026-33669 vulnerability exposed document IDs and content in earlier SiYuan versions, but the issue has been patched in release 3.6.2, with no evidence of active exploitation or PoC.

CVE@CVEnewDisclosure

The text merely discloses that SiYuan versions prior to 3.6.2 allow document IDs to be retrieved through specific API endpoints, with no evidence of a Proof of Concept, exploit code, or active exploitation.