CVE-2026-72792
published 2026-08-12CVE-2026-72792: SiYuan before v3.7.4 contains an information disclosure vulnerability in the /api/tag/getTag endpoint that returns tag labels and occurrence counts from…
PriorityP430medium5.8CVSS 3.1
AVNACLPRNUINSCCLINAN
EPSS
0.24%
14.9th percentile
SiYuan before v3.7.4 contains an information disclosure vulnerability in the /api/tag/getTag endpoint that returns tag labels and occurrence counts from password-protected documents to unauthenticated readers. Attackers can enumerate tag vocabulary and internal terminology from password-protected documents by calling the tag endpoint without providing the document's publish password.
Affected
2 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| github.com | siyuan-note_siyuan_kernel | >= 0 < 0.0.0-20260726002639-4515fa257cfa | 0.0.0-20260726002639-4515fa257cfa |
| siyuan-note | siyuan | < 3.7.4 | 3.7.4 |
CVSS provenance
nvdv3.15.8MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N
nvdv4.06.9MEDIUMCVSS: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
ghsa5.8MEDIUM
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GHSA
SiYuan: Tag labels from password-protected documents are returned to readers who have not entered the password
ghsa·2026-09-04·CVSS 5.8
CVE-2026-72792 [MEDIUM] CWE-863 SiYuan: Tag labels from password-protected documents are returned to readers who have not entered the password
SiYuan: Tag labels from password-protected documents are returned to readers who have not entered the password
**CVE:** This vulnerability corresponds to [CVE-2026-72792](https://nvd.nist.gov/vuln/detail/CVE-2026-72792).
### Summary
`/api/tag/getTag` filters its results for reader roles through `FilterTagsByPublishIgnore`, which checks only the *visible* publish tier. Documents that are published but password-protected pass that check, so a reader who has never entered a document's publish password receives every tag label used inside it, together with occurrence counts.
The project has already treated this exact tier mismatch as a vulnerability on a sibling path: commit `82e9ded42` ("Enforce publish access for graph nodes") moved the graph endpoint off the visible-only filter and onto
GHSA
SiYuan before v3.7.4 contains an information disclosure vulnerability in the /api/tag/getTag endpoint that returns tag labels and occurrence counts from password-protected documents to unauthenticated
ghsa_unreviewed·2026-08-12
CVE-2026-72792 [MEDIUM] CWE-863 SiYuan before v3.7.4 contains an information disclosure vulnerability in the /api/tag/getTag endpoint that returns tag labels and occurrence counts from password-protected documents to unauthenticated
SiYuan before v3.7.4 contains an information disclosure vulnerability in the /api/tag/getTag endpoint that returns tag labels and occurrence counts from password-protected documents to unauthenticated readers. Attackers can enumerate tag vocabulary and internal terminology from password-protected documents by calling the tag endpoint without providing the document's publish password.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2026-08-12
Published