VulnerabilityPublished 12 Aug 2026Updated 14 Aug 2026

CVE-2026-72799: 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 9 Nov 2026, 23:24 UTC

CVSS 4.0 base score

6.9Medium

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

EPSS: 0.3% chance of exploitation in 30 days – higher than 25% 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 10 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
GitHubsiyuan-note/siyuan`pkg:github/siyuan-note/siyuan`Other threats	Affected <=3.7.2	Fixed in–

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Description

**CVE:** This vulnerability corresponds to [CVE-2026-72799](https://nvd.nist.gov/vuln/detail/CVE-2026-72799). ### Summary Five filetree endpoints resolve arbitrary document IDs and paths with no publish-access check of any kind. All are `CheckAuth`-only, so they are reachable by the publish `RoleReader` token and by the anonymous account when `Publish.Auth.Enable` is `false`. An anonymous reader can map the complete private document tree every notebook, folder, and document title, and which notebook holds each document for documents marked hidden, password-protected, or publish-forbidden, and can resolve titles to document IDs. ### Details None of the following handlers invokes `IsReadOnlyRoleContext`, `CheckBlockIdAccessableByPublishAccess`, or `CheckPathAccessableByPublishIgnore`: | Endpoint | Returns | Discloses | |---|---|---| | `getFullHPathByID` (router 159) | `GetFullHPathByID(id)` | full title path including notebook, e.g. `/MySecretNotebook/Confidential/Q3 Layoffs Plan` | | `getHPathByID` (router 157) | `GetHPathByID(id)` | document-relative title path | | `getPathByID` (router 158) | `{path, notebook}` | which notebook a document lives in, plus its `.sy` storage path | | `getIDsByHPath` (router 160) | `GetIDsByHPath(path, notebook)` | title-path → document-ID enumeration | | `getHPathByPath` (router 155) | HPath from a storage path | title path from a storage path | Each accepts an arbitrary ID or HPath and resolves it identically for hidden, publish-forbidden, and password-protected documents. This enables two operations for an unauthenticated caller: 1. **Map the private document tree**: `getFullHPathByID` and `getPathByID` yield every notebook/folder/document title and its containing notebook. 2. **Resolve titles to IDs**: `getIDsByHPath` converts a known or guessed title path into document IDs, which are the required input for other block-read endpoints. Document titles and HPaths are precisely the block metadata that the project's block-metadata restriction (commit `ffde3b21e`) set out to protect; that change gated `getBlockInfo`, `getDocInfo`, and `getDocsInfo` but left this entire path-resolution family open. **Guarded-sibling asymmetry.** `getRecentDocs` (`FilterRecentDocsByPublishAccess`), `getCriteria` (`FilterCriteriaByPublishAccess`), and `getLocalStorage` (`FilterLocalStorageByPublishAccess`) all filter document references for reader sessions. The codebase clearly publish-scopes reader-visible metadata elsewhere; these five endpoints do not. Verified at `origin/master` (`eef105683`): all five handler bodies contain no publish-access call; the storage-family siblings contain their filters; all five routes are registered `CheckAuth` without `CheckAdminRole`. ### Proof of Concept Precondition: publish mode enabled (default port 6808); anonymous when `Publish.Auth.Enable` is `false`, otherwise any publish reader account. A document exists in a notebook marked publish-forbidden or password-protected. **Resolve a private document's full title path:** ``` POST http://127.0.0.1:6808/api/filetree/getFullHPathByID {"id":"<DOC_ID>"} → /MySecretNotebook/Confidential/Q3 Layoffs Plan ``` **Identify its notebook and storage path:** ``` POST http://127.0.0.1:6808/api/filetree/getPathByID {"id":"<DOC_ID>"} → {"path":"/....sy","notebook":"<BOX_ID>"} ``` **Enumerate IDs from a title path:** ``` POST http://127.0.0.1:6808/api/filetree/getIDsByHPath {"path":"/Confidential","notebook":"<BOX_ID>"} → document IDs under a folder the reader cannot otherwise access ``` Each returns data for documents excluded from publishing; no password or membership is required. ### Impact An anonymous reader (publish mode with auth disabled) or any publish `RoleReader` can enumerate the complete private document structure: notebook names, folder hierarchy, and document titles for content the administrator marked hidden, password-protected, or excluded from publishing. Document titles alone are frequently sensitive (project names, personnel actions, client identifiers). The ID-resolution direction additionally supplies valid document IDs, removing the "attacker must know an ID" precondition for other block-read endpoints. Confidentiality-only. ### Suggested fix For `IsReadOnlyRoleContext` sessions, gate each of the five handlers with `CheckBlockIdAccessableByPublishAccess` (or restrict resolution to publish-visible documents), mirroring the treatment already applied in `getRecentDocs`, `getCriteria`, and `getLocalStorage`.

Impact

An attacker without authentication can map the entire private document tree structure, exposing sensitive metadata such as notebook names, folder hierarchies, and document titles. This includes documents intended to be hidden or protected, potentially leading to privacy breaches and information disclosure. However, the vulnerability does not indicate direct document content exposure or modification capabilities.

Summary

CVE-2026-72799 describes a missing authorization vulnerability in SiYuan note-taking software versions up to 3.7.2. The flaw affects five filetree path-resolution endpoints (getFullHPathByID, getHPathByID, getPathByID, getIDsByHPath, and getHPathByPath) where publish-access filters are not enforced when Publish.Auth.Enable is false in publish mode. This allows unauthenticated or any publish reader token users to enumerate the complete private document tree, revealing notebook names, folder hierarchies, document titles, and resolving title paths to document IDs, including those documents that are hidden, password-protected, or marked as publish-forbidden.

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Affected software

Description

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

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