CVE-2026-23850 json
SiYuan vulnerable to arbitrary file read
published 2026-01-19 9 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-3292 , GHSA-cv54-7wv7-qxcw , GO-2026-4347
- cvss
- 7.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 49%
- public exploits
- 0
- none known
Summary
SiYuan is a personal knowledge management system. In versions prior to 3.5.4, the markdown feature allows unrestricted server side html-rendering which allows arbitrary file read (LFD). Version 3.5.4 fixes the issue.
Patch / fix
- go github.com/siyuan-note/siyuan/kernel 0.0.0-20260118092326-b2274baba2e1
- b3log siyuan 3.5.4
- govulncheck-vulndb openSUSE Leap 15.6 0.0.20260205T172317-150000.1.146.1
suse advisories SUSE-SU-2026:0403-1
- govulncheck-vulndb openSUSE Leap 16.0 0.0.20260723T184607-160000.1.1
opensuse advisories openSUSE-SU-2026:21483-1
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 9 mo ago
Exploit prediction
0.62% chance of exploitation in the next 30 days, higher than 49% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/siyuan-note/siyuan/security/advisories/GHSA-cv54-7wv7-qxcw referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 7.8 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:P |
| CNA | 4.0 | 7.8 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/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 |
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| go | github.com/siyuan-note/siyuan/kernel | <0.0.0-20260118092326-b2274baba2e1 |
0.0.0-20260118092326-b2274baba2e1 |
Affected products
- siyuan-note siyuan
Classification
- Weakness
-
- CWE-22 Improper Limitation of a Pathname to a Restricted Directory
References
-
github.com
/siyuan-note/siyuan/commit/b2274baba2e11c8cf8901b0c5c871e5b27f1f6dd
web, patch
-
github.com
/siyuan-note/siyuan/commit/f8f4b517077b92c90c0d7b51ac11be1b34b273ad
web, patch
-
github.com
/siyuan-note/siyuan/security/advisories/GHSA-cv54-7wv7-qxcw
web, exploit, patch, vendor-advisory, advisory
-
github.com
/siyuan-note/siyuan/issues/16860
web, issue-tracking, patch
-
github.com
/siyuan-note/siyuan/blob/master/kernel/model/file.go#L1035
web, product
-
github.com
/siyuan-note/siyuan/blob/v3.4.2/kernel/api/filetree.go#L799-L886
web, product
-
nvd.nist.gov
/vuln/detail/CVE-2026-23850
advisory
-
github.com
/siyuan-note/siyuan
package
Sources
- CVE List CVE-2026-23850
- GitHub Advisory GHSA-cv54-7wv7-qxcw
- NVD CVE-2026-23850
- OSV GO-2026-4347
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.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.