VulnerabilityPublished 12 Aug 2026Updated 14 Aug 2026

CVE-2026-72797: siyuan · Missing Authorization

Affects siyuanSource CVE Database V5

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Not known to be exploited · CVSS 6.9 Medium : upgrade to 3.7.4 when convenient.

Data as of 11 Nov 2026, 23:24 UTC

CVSS 4.0 base score

6.9Medium

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.2% chance of exploitation in 30 days – higher than 22% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 3.7.4

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

Attack Vector: Network
Attack Complexity: Low
Attack Requirements: None
Privileges Required: None
User Interaction: None
Vulnerable system confidentiality: Low
Vulnerable system integrity: None
Vulnerable system availability: None
Subsequent system confidentiality: Low
Subsequent system integrity: None
Subsequent system availability: None

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable system is bound to the network stack and the set of possible attackers extends beyond the other options listed below, up to and including the entire Internet. Such a vulnerability is often termed “remotely exploitable” and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system.
Attack Requirements: None: The successful attack does not depend on the deployment and execution conditions of the vulnerable system. The attacker can expect to be able to reach the vulnerability and execute the exploit under all or most instances of the vulnerability.
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files of the vulnerable system to carry out an attack.
User Interaction: None: The vulnerable system can be exploited without interaction from any human user, other than the attacker.
Vulnerable system confidentiality: Low: There is some loss of confidentiality. Access to some restricted information is obtained, but the attacker does not have control over what information is obtained, or the amount or kind of loss is limited. The information disclosure does not cause a direct, serious loss to the Vulnerable System.
Vulnerable system integrity: None: There is no loss of integrity within the Vulnerable System.
Vulnerable system availability: None: There is no impact to availability within the Vulnerable System.
Subsequent system confidentiality: Low: There is some loss of confidentiality. Access to some restricted information is obtained, but the attacker does not have control over what information is obtained, or the amount or kind of loss is limited. The information disclosure does not cause a direct, serious loss to the Subsequent System.
Subsequent system integrity: None: There is no loss of integrity within the Subsequent System or all integrity impact is constrained to the Vulnerable System.
Subsequent system availability: None: There is no impact to availability within the Subsequent System or all availability impact is constrained to the Vulnerable System.

Definitions: FIRST CVSS v4.0 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 12 Aug 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 11 Nov 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade siyuan to 3.7.4.

Affected software

Product	Affected	Fixed in
siyuan-notesiyuan	Affected <3.7.4	Fixed in 3.7.4

AI-suggested

If you cannot patch yet, restrict access to the getEncryptedNotebookStatus endpoint to trusted users only, if possible, and monitor for unusual access patterns related to notebook enumeration.

Description

**CVE:** This vulnerability corresponds to [CVE-2026-72797](https://nvd.nist.gov/vuln/detail/CVE-2026-72797). ### Summary `POST /api/notebook/getEncryptedNotebookStatus` returns the identifier, name, and current lock state of every encrypted notebook, with no publish-access filtering. The route is registered `CheckAuth` only, no `CheckReadonly`, no `CheckAdminRole` so it is reachable by the publish `RoleReader` token and by the anonymous account when `Publish.Auth.Enable` is `false`. Encrypted notebooks are private by design; their names frequently reveal the sensitive topic that motivated encrypting them. ### Details Route registration (`kernel/api/router.go:131`): ```go ginServer.Handle("POST", "/api/notebook/getEncryptedNotebookStatus", model.CheckAuth, getEncryptedNotebookStatus) ``` The handler (`kernel/api/notebook.go`) accepts no arguments and contains no `IsReadOnlyRoleContext` branch and no publish-access filter of any kind. It returns, for every encrypted notebook, `{id, name, unlocked}`, the notebook's `box.Name` and its live lock state together with `enabled`, `count`, `migrationPending`, `migrationBoxes`, and `hasHistoryDependency`. **Guarded-sibling asymmetry.** The primary notebook listing `lsNotebooks`, in the same file and also reader-reachable, *does* filter: it skips notebooks that are `Closed` and any notebook whose `publishAccess` entry is not `Visible`. The project therefore publish-scopes notebook listings but `getEncryptedNotebookStatus` enumerates all encrypted notebooks unconditionally. **Still unfixed at HEAD.** The encrypted-notebook hardening series (issue #18034 idle auto-lock, lock-on-background, key handling, atomic unlock) is local-threat work. Commit `f2d966659` ("Expose encrypted notebook unlock status to plugins") introduced this exposure, and no subsequent commit gates it for the publish/reader boundary. **Secondary effect.** `unlocked: true` is a live indicator of exactly when an encrypted notebook's plaintext is resident in memory, the window during which reader-reachable code paths that accept a notebook argument can read its decrypted content. ### Proof of Concept Precondition: publish mode enabled (default port 6808); anonymous when `Publish.Auth.Enable` is `false`, otherwise any publish reader account. At least one encrypted notebook exists. ``` POST http://127.0.0.1:6808/api/notebook/getEncryptedNotebookStatus {} ``` Returns the full set of encrypted notebooks with their IDs, names, and current `unlocked` state including notebooks that `lsNotebooks` withholds from the same reader session. No arguments and no privileged access are required. ### Impact An anonymous reader (publish mode with auth disabled) or any publish `RoleReader` learns which encrypted notebooks exist, what they are called, and whether each is currently unlocked. Notebook names are themselves sensitive: a user encrypts a notebook precisely because its subject matter is private, and the name commonly states that subject. Disclosing existence and naming to unauthenticated parties defeats that expectation, and the live lock state additionally reveals when the notebook's contents are decrypted in memory. Confidentiality-only. ### Suggested fix For `IsReadOnlyRoleContext` sessions, either reject the request or restrict the response to notebooks that are publish-visible, mirroring the filtering already applied in `lsNotebooks`. Encrypted notebooks arguably should never be enumerated to a reader at all.

Impact

The vulnerability allows unauthorized users, including anonymous readers and publish-mode accounts, to enumerate encrypted notebooks and view their names and unlock states. This leads to information disclosure of sensitive notebook metadata and decryption status, potentially compromising user privacy. There is no indication of direct code execution or data modification impact.

Summary

CVE-2026-72797 is an information disclosure vulnerability affecting SiYuan note-taking software versions prior to v3.7.4. The vulnerability exists in the getEncryptedNotebookStatus endpoint, which fails to enforce publish-access filtering. This allows unauthenticated or publish-mode users to retrieve encrypted notebook identifiers, names, and lock states, thereby enumerating all encrypted notebooks and revealing their current unlock status. The exposure of sensitive notebook metadata and decryption state information could lead to privacy concerns. The CVSS 4.0 base score is 6.9, indicating a medium severity vulnerability.

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Affected software

Description

AI analysisMachine-generated, updated 12 Aug 2026, 19:43 UTC

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