CVE-2026-72801
published 2026-08-12CVE-2026-72801: SiYuan versions before v3.7.4 disclose encrypted-notebook key-derivation material and wrapped data keys through unauthenticated endpoints in publish mode…
PriorityP345high7.5CVSS 3.1
AVNACLPRNUINSUCHINAN
EPSS
0.24%
15.6th percentile
SiYuan versions before v3.7.4 disclose encrypted-notebook key-derivation material and wrapped data keys through unauthenticated endpoints in publish mode. Attackers can retrieve Argon2id salt, cost parameters, password verifiers, and wrapped notebook keys to perform unlimited offline master-password cracking without rate limiting.
Affected
2 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| github.com | siyuan-note_siyuan_kernel | >= 0 < 0.0.0-20260724102025-3bc014c7dc32 | 0.0.0-20260724102025-3bc014c7dc32 |
| siyuan-note | siyuan | < 3.7.4 | 3.7.4 |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
nvdv4.08.7HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/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
ghsa7.5HIGH
Stop checking back — get the weekly exploitation signal.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
VulDB
SiYuan-Note SiYuan up to 3.7.3 Publish Mode information disclosure (EUVD-2026-57461)
vuldb·2026-09-04·CVSS 7.5
CVE-2026-72801 [HIGH] SiYuan-Note SiYuan up to 3.7.3 Publish Mode information disclosure (EUVD-2026-57461)
A vulnerability classified as problematic has been found in SiYuan-Note SiYuan up to 3.7.3. Impacted is an unknown function of the component Publish Mode. This manipulation causes information disclosure.
This vulnerability is registered as CVE-2026-72801. Remote exploitation of the attack is possible. No exploit is available.
It is recommended to upgrade the affected component.
GHSA
SiYuan: Encrypted-notebook key-derivation material and wrapped notebook keys disclosed to anonymous readers, enabling offline master-password cracking
ghsa·2026-09-03·CVSS 7.5
CVE-2026-72801 [HIGH] CWE-522 SiYuan: Encrypted-notebook key-derivation material and wrapped notebook keys disclosed to anonymous readers, enabling offline master-password cracking
SiYuan: Encrypted-notebook key-derivation material and wrapped notebook keys disclosed to anonymous readers, enabling offline master-password cracking
**CVE:** This vulnerability corresponds to [CVE-2026-72801](https://nvd.nist.gov/vuln/detail/CVE-2026-72801).
### Summary
Two `CheckAuth`-only endpoints disclose the complete offline attack material for the encrypted-notebook master password, plus the wrapped per-notebook key needed to use it. Both are reachable by the publish `RoleReader` token and by the anonymous account when `Publish.Auth.Enable` is `false`. An unauthenticated remote client can retrieve the Argon2id salt and cost parameters, a verifier that confirms a correct password offline, and the encrypted per-notebook data key reducing the security of every encrypted notebook to
GHSA
SiYuan versions before v3.7.4 disclose encrypted-notebook key-derivation material and wrapped data keys through unauthenticated endpoints in publish mode.
ghsa_unreviewed·2026-08-12
CVE-2026-72801 [HIGH] CWE-522 SiYuan versions before v3.7.4 disclose encrypted-notebook key-derivation material and wrapped data keys through unauthenticated endpoints in publish mode.
SiYuan versions before v3.7.4 disclose encrypted-notebook key-derivation material and wrapped data keys through unauthenticated endpoints in publish mode. Attackers can retrieve Argon2id salt, cost parameters, password verifiers, and wrapped notebook keys to perform unlimited offline master-password cracking without rate limiting.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2026-08-12
Published