CVE-2026-68586: SiYuan before v3.7.3 fails to apply publish-access filters to the getBacklinkDoc and getBackmentionDoc content

Q: How do I fix CVE-2026-68586?

No fixed release is listed yet. Watch the vendor advisory and apply any mitigation shown on this page.

Q: Is CVE-2026-68586 being exploited?

CVE-2026-68586 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-2026-68586 affect?

CVE-2026-68586 affects affected software. Severity is high (CVSS 8.6). SiYuan before v3.7.3 fails to apply publish-access filters to the getBacklinkDoc and getBackmentionDoc content endpoints (/api/ref/getBacklinkDoc and /api/ref/getBackmentionDoc). While the corresponding backlink list endpoints filter publis

Q: How urgent is CVE-2026-68586?

Priority 44/100. High severity; Remotely exploitable, no login, no user action

This month

HIGH 8.6REMOTE

CVE-2026-68586 is a high-severity flaw (CVSS 8.6) affecting affected software. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

SiYuan before v3.7.3 fails to apply publish-access filters to the getBacklinkDoc and getBackmentionDoc content endpoints (/api/ref/getBacklinkDoc and /api/ref/getBackmentionDoc). While the corresponding backlink list endpoints filter publish-forbidden documents, the content endpoints (gated only by CheckAuth) do not. A publish-mode reader — including an anonymous reader when publish Basic Auth is disabled — can call these endpoints directly with

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	8.6 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 66%)
CISA exploited list	No
Weakness	CWE-862
Published	2026-08-03
Last modified	2026-10-23

Publisher (CNA): VulnCheck

Last updated 2026-10-23 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Timeline

2026-08-03 14:16 UTCPublished CVE record published
2026-10-23 21:10 UTCUpdated Record last modified

Exact fixes by distribution

Go · github.com/siyuan-note/siyuan/kernel · FIXED · 0.0.0-20260721014413-f45749a7ef6e · vulnerable: < 0.0.0-20260721014413-f45749a7ef6e · source

go get github.com/siyuan-note/siyuan/kernel@v0.0.0-20260721014413-f45749a7ef6e go list -m github.com/siyuan-note/siyuan/kernel

Fedora 46 · kwin-zones · FIXED · 1.0.13-1.fc46 · FEDORA-2026-95888f332b · source

sudo dnf upgrade --advisory=FEDORA-2026-95888f332b

Fedora ELN · nginx-mod-brotli · FIXED · 1.0.0~rc-16.eln159 · FEDORA-2026-501a6a8273 · source

sudo dnf upgrade --advisory=FEDORA-2026-501a6a8273

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-36v8-mpjm-8j5r

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-2026-68586?

No fixed release is listed yet. Watch the vendor advisory and apply any mitigation shown on this page.

Is CVE-2026-68586 being exploited?

CVE-2026-68586 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-2026-68586 affect?

CVE-2026-68586 affects affected software. Severity is high (CVSS 8.6). SiYuan before v3.7.3 fails to apply publish-access filters to the getBacklinkDoc and getBackmentionDoc content endpoints (/api/ref/getBacklinkDoc and /api/ref/getBackmentionDoc). While the corresponding backlink list endpoints filter publis

How urgent is CVE-2026-68586?

Priority 44/100. High severity; Remotely exploitable, no login, no user action

References

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