VulnSocial

CVE-2026-34453Disclosure(b3log / siyuan)

LOWCVSS 7.5 · HIGH

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Patch b3log siyuan systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

SiYuan is a personal knowledge management system. Prior to version 3.6.2, the publish service exposes bookmarked blocks from password-protected documents to unauthenticated visitors. In publish/read-only mode, /api/bookmark/getBookmark filters bookmark results by calling FilterBlocksByPublishAccess(nil, ...). Because the filter treats a nil context as authorized, it skips the publish password check and returns bookmarked blocks from documents configured as Protected. As a result, anyone who can access the publish service can retrieve content from protected documents without providing the required password, as long as at least one block in the document is bookmarked. This issue has been patched in version 3.6.2.

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0.5/ 10 priority

Sources & remediation

Exploit / PoC references
Other references
Weakness type (CWE)
CWE-863

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

  • Patch or workaround signal is available
  • 2 mentions across 2 observed days
  • Momentum state: stable

What's happening

  • Patch or workaround mentioned in 1 signal
  • Technical details provided in 2 signals
  • Disclosure: 2 classified signals
  • Peaked 1d ago at 1 mentions (2026-04-01); latest day: 1
  • 2 total mentions across 2 days

Affected systems

Vendors
b3log
Products
siyuan

Deep dive

Activity timeline2 mentions / 2d
00111Mentions · 2026-04-01: 1Mentions · 2026-04-02: 1Patch / Workaround · 2026-04-01: 1Technical Details · 2026-04-01: 1Technical Details · 2026-04-02: 104-0104-02
Signal classification1 categories
Disclosure
2100.0%
Referenced assets2 URLs
Full discourse2 posts
  • pdnuclei-bot@pdnuclei_bot
    Disclosure

    🚨 CVE-2026-34453 - high 🚨 SiYuan <= v3.6.1 - Bookmark Data Disclosure > SiYuan v3.6.2 contains an information disclosure vulnerability caused by improper aut... 👾 https://cloud.projectdiscovery.io/library/CVE-2026-34453 @pdnuclei #NucleiTemplates #cve

    Post summary

    CVE‑2026‑34453 is disclosed as an information‑disclosure flaw in SiYuan versions ≤ v3.6.1, with a brief technical description and a link to ProjectDiscovery’s library for more details.

    00011189
    905 followersView on X
  • CVE@CVEnew
    Disclosure

    CVE-2026-34453 SiYuan is a personal knowledge management system. Prior to version 3.6.2, the publish service exposes bookmarked blocks from password-protected documents to unauthent… https://www.cve.org/CVERecord?id=CVE-2026-34453

    Post summary

    CVE‑2026‑34453 reveals that SiYuan’s publish service exposed bookmarked blocks from password‑protected documents to unauthenticated users prior to version 3.6.2; rolling the patch in v3.6.2 mitigates the issue.

    0000094
    56.9K followersView on X
CPE platform detail1 entries

1 of 1 entries

PartVendorProductVersionTarget SWTarget HW
Appb3logsiyuan---

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