CVE-2026-72805 json
SiYuan before v3.7.4 Information Disclosure via Block Endpoints
published 2026-08-12 2 mo ago modified 2026-10-24 15 d ago also GHSA-67x2-mq63-v9vm , GO-2026-6387 , EUVD-2026-57465
- cvss
- 5.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 22%
- public exploits
- 0
- none known
Summary
SiYuan versions before v3.7.4 fail to enforce publish-access checks on getBlockBreadcrumb, getRefText, and getBlockTreeInfos endpoints, allowing disclosure of protected document content and metadata. Anonymous readers or publish RoleReader accounts can retrieve document titles, ancestor block content snippets, reference text, and path metadata for publish-forbidden or password-protected documents by supplying block IDs.
Patch / fix
- go github.com/siyuan-note/siyuan/kernel 0.0.0-20260723163028-931ba693375e
- siyuan-note siyuan 3.7.4
- govulncheck-vulndb SLES 16.0, SLES for SAP applications 16.0 0.0.20260916T180043-160000.1.1
suse advisories SUSE-SU-2026:23855-1SUSE-SU-2026:23863-1
- govulncheck-vulndb openSUSE Leap 16.0 0.0.20260916T180043-160000.1.1
opensuse advisories openSUSE-SU-2026:21897-1
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 2 mo ago
Exploit prediction
0.30% chance of exploitation in the next 30 days, higher than 22% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/siyuan-note/siyuan/security/advisories/GHSA-67x2-mq63-v9vm referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 6.9 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N |
| CNA | 3.1 | 5.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N |
| CNA | 4.0 | 6.9 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
| GitHub | 3.1 | 5.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| go | github.com/siyuan-note/siyuan/kernel | <0.0.0-20260723163028-931ba693375e |
0.0.0-20260723163028-931ba693375e |
Affected products
- siyuan-note siyuan
Classification
- Weakness
-
- CWE-862 Missing Authorization
References
-
github.com
/siyuan-note/siyuan/commit/931ba693375ea9877b2ef74f9bfb632fad5bab3f
web
-
github.com
/siyuan-note/siyuan/security/advisories/GHSA-67x2-mq63-v9vm
vendor-advisory, exploit, web, advisory
-
vulncheck.com
/advisories/siyuan-before-information-disclosure-via-block-endpoints
third-party-advisory, web
-
nvd.nist.gov
/vuln/detail/CVE-2026-72805
advisory
-
github.com
/siyuan-note/siyuan
package
Sources
- CVE List CVE-2026-72805
- GitHub Advisory GHSA-67x2-mq63-v9vm
- NVD CVE-2026-72805
- OSV GO-2026-6387
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.