9.8

CVE-2026-33669: b3log siyuan Out-of-bounds Read

CVSS: 9.8v3.1CriticalAnalyzed
AliasesGHSA-34xj-66v3-6j83GO-2026-4842
Published 26-03-2026Last modified 27-03-2026
Open JSON

Vulnerability summary

CVE-2026-33669 is a critical (CVSS 9.8) Out-of-bounds Read vulnerability in b3log siyuan. EPSS estimates a 0.52% chance of exploitation in the next 30 days, higher than 42.7% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)
EPSS score
0.52%
0%100%
Low · -0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github

Advisory lineage

Upstream 0 · Downstream 2 · Related 2
OPENSUSE-SU-2026:21483-1SUSE-SU-2026:1135-1

Timeline

  1. 26-03-2026
    PublishedVulnerability first disclosed.
  2. 27-03-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.52%

Chance of exploitation in the next 30 days

Percentile

43%

Versus all other CVEs

30-day change

-0.01 pp

From 0.52% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.52%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • githubUnverified

    Siyuan

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

B3log1 product
Github.com/siyuan-note/siyuan1 product
  • kernel≤ 0.0.0-20260317012524-fe4523fff2c8 | All versions (No fix recorded)
Siyuan-note1 product

3 vendors · 3 products

References

3 links