CVE-2026-33670Disclosure(b3log / siyuan)

LOWCVSS 7.5 · HIGH

Exploit discussion active in current signal (1 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, 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.

b3log CVEs Back to dashboard

2.0/ 10 priority

Sources & remediation

Exploit / PoC references

https://github.com/siyuan-note/siyuan/security/advisories/GHSA-xmw9-6r43-x9ww

Weakness type (CWE)

CWE-22

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 3 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: 4 classified signals
Peaked 2d ago at 3 mentions (2026-03-26); latest day: 1
5 total mentions across 3 days

Affected systems

Vendors

b3log

Products

siyuan

Deep dive

Activity timeline5 mentions / 3d

Signal classification2 categories

Disclosure

480.0%

Patch

120.0%

Referenced assets5 URLs

By indicator

Classification over time

Date	Total	Labels

2026-03-26	3	Disclosure2Patch1
2026-03-27	1	Disclosure1
2026-03-30	1	Disclosure1

Full discourse5 posts

0day Signal@0dayPublishing192d
Disclosure
🚨 CVE-2026-33670: SiYuan has directory traversal w... `/api/file/readDir` with no path sanitization = instant notebook enumeration and potential file system escape - persona... https://zerodaysignal.com/vulnerability/CVE-2026-33670 #netsec #vulnerability #CVE #sysadmin #zeroday
Post summary
The post announces a directory traversal vulnerability in SiYuan’s `/api/file/readDir` endpoint, providing a link to a detailed report and outlining the technical issue, but it does not mention exploit code, active exploitation, or patch information.
0000067
194 followersView on X
PulsePatch.io@pulsepatchio195d
Disclosure
A critical directory traversal vulnerability (CVE-2026-33670) has been identified in the `SiYuan` publishing service. This flaw may allow unauthorized file system access. Admins should monitor for official patches. #Security #Vulnerability #InfoSec https://www.pulsepatch.io/posts/cve-2026-33670-siyuan-directory-traversal
Post summary
A critical directory traversal flaw (CVE-2026-33670) in the SiYuan publishing service has been disclosed; administrators should keep an eye out for forthcoming official patches.
0000028
6 followersView on X
CVEFind.com@CveFindCom196d
Patch
[CVE-2026-33670: CRITICAL] SiYuan's recent update to version 3.6.2 addresses a security vulnerability in the /api/file/readDir interface, enhancing cyber security by patching the issue.#cve,CVE-2026-33670,#cybersecurity https://cvefind.com/CVE-2026-33670
Post summary
SiYuan released version 3.6.2 to patch CVE‑2026‑33670, fixing a vulnerability in the /api/file/readDir endpoint, with no exploitation details disclosed.
00000410
617 followersView on X
The Hacker Wire@TheHackerWire196d
Disclosure
🔴 CVE-2026-33670 - Critical 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 noteboo... https://www.thehackerwire.com/vulnerability/CVE-2026-33670/ https://t.co/VgaPIbaT4L
Post summary
CVE-2026-33670 is a critical directory traversal vulnerability in SiYuan’s /api/file/readDir endpoint, allowing enumeration of all document names prior to version 3.6.2.
0000039
163 followersView on X
CVE@CVEnew196d
Disclosure
CVE-2026-33670 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 docu… https://www.cve.org/CVERecord?id=CVE-2026-33670
Post summary
The CVE highlights a directory traversal flaw in SiYuan's /api/file/readDir endpoint prior to v3.6.2, allowing retrieval of file names, but no PoC, exploit, or patch information is provided.
0000061
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-2026-33670

0day Signal@0dayPublishingDisclosure

The post announces a directory traversal vulnerability in SiYuan’s `/api/file/readDir` endpoint, providing a link to a detailed report and outlining the technical issue, but it does not mention exploit code, active exploitation, or patch information.

PulsePatch.io@pulsepatchioDisclosure

A critical directory traversal flaw (CVE-2026-33670) in the SiYuan publishing service has been disclosed; administrators should keep an eye out for forthcoming official patches.

CVEFind.com@CveFindComPatch

SiYuan released version 3.6.2 to patch CVE‑2026‑33670, fixing a vulnerability in the /api/file/readDir endpoint, with no exploitation details disclosed.

The Hacker Wire@TheHackerWireDisclosure

CVE-2026-33670 is a critical directory traversal vulnerability in SiYuan’s /api/file/readDir endpoint, allowing enumeration of all document names prior to version 3.6.2.

CVE@CVEnewDisclosure

The CVE highlights a directory traversal flaw in SiYuan's /api/file/readDir endpoint prior to v3.6.2, allowing retrieval of file names, but no PoC, exploit, or patch information is provided.