VulnerabilityPublished 3 Aug 2026Updated 14 Aug 2026

CVE-2026-69083: siyuan · SQL Injection

Affects siyuanSource CVE Database V5

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Not known to be exploited · CVSS 9.9 Critical : upgrade to 3.7.3 as a priority.

Data as of 1 Nov 2026, 22:58 UTC

CVSS 4.0 base score

9.9Critical

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

EPSS: 0.4% chance of exploitation in 30 days – higher than 41% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 3.7.3

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N

Attack Vector: Network
Attack Complexity: Low
Attack Requirements: None
Privileges Required: None
User Interaction: None
Vulnerable system confidentiality: High
Vulnerable system integrity: High
Vulnerable system availability: None
Subsequent system confidentiality: High
Subsequent system integrity: High
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: High: There is a total loss of confidentiality, resulting in all information within the Vulnerable System being divulged to the attacker. Alternatively, access to only some restricted information is obtained, but the disclosed information presents a direct, serious impact. For example, an attacker steals the administrator's password, or private encryption keys of a web server.
Vulnerable system integrity: High: There is a total loss of integrity, or a complete loss of protection. For example, the attacker is able to modify any/all files protected by the vulnerable system. Alternatively, only some files can be modified, but malicious modification would present a direct, serious consequence to the vulnerable system.
Vulnerable system availability: None: There is no impact to availability within the Vulnerable System.
Subsequent system confidentiality: High: There is a total loss of confidentiality, resulting in all resources within the Subsequent System being divulged to the attacker. Alternatively, access to only some restricted information is obtained, but the disclosed information presents a direct, serious impact. For example, an attacker steals the administrator's password, or private encryption keys of a web server.
Subsequent system integrity: High: There is a total loss of integrity, or a complete loss of protection. For example, the attacker is able to modify any/all files protected by the Subsequent System. Alternatively, only some files can be modified, but malicious modification would present a direct, serious consequence to the Subsequent 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 3 Aug 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: evidence found.
Public exploit code: GitHub proofs of concept
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), GitHub proofs of concept, the Metasploit, Exploit-DB and nuclei-templates index as of 1 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 3.7.3.

Affected software

Product	Affected	Fixed in
siyuan-notesiyuan	Affected <3.7.3	Fixed in 3.7.3

AI-suggested

If you cannot patch yet, restricting access to the vulnerable endpoint or implementing web application firewall rules to detect and block SQL injection attempts may help mitigate risk.

Description

**CVE:** This vulnerability corresponds to [CVE-2026-69083](https://nvd.nist.gov/vuln/detail/CVE-2026-69083). ### Summary The `/api/search/fullTextSearchAssetContent` endpoint exposes two SQL flaws on the asset-content database, both reachable by the publish `RoleReader` token and by the anonymous account when `Publish.Auth.Enable` is `false`: 1. **method 2** passes a client-supplied SQL statement to the read-write asset-content DB with no single-statement or read-only guard, and without the admin restriction its sibling `fullTextSearchBlock` applies to the same SQL method. 2. **method 3** builds a `REGEXP` clause by concatenating the client expression with no quote-escaping, permitting SQL breakout while the equivalent block-search builder does escape. Both run on a read-write handle through a statement-stacking-capable driver, spanning the cross-notebook asset-content store. ### Details **Route / auth tier.** `router.go`: `Handle("POST", "/api/search/fullTextSearchAssetContent", model.CheckAuth, fullTextSearchAssetContent)`, `CheckAuth` only. Anonymous/reader reachable on the publish surface. `parseSearchAssetContentArgs` reads `method` and `query` straight from the JSON body with no constraint, so both are fully client-controlled. **Missing admin guard (contrast with the sibling).** `fullTextSearchBlock` rejects the SQL method for non-admins (`if method == 2 && !IsAdminRoleContext(c)`). `fullTextSearchAssetContent` has no such check on its handler, so the SQL method is reachable by a reader. **method 2 : raw SQL, no statement guard.** Dispatch: `FullTextSearchAssetContent` case 2 → `searchAssetContentBySQL(query, …)`. After `filterQueryInvisibleChars` + `TrimSpace`, the statement is passed to `sql.SelectAssetContentsRawStmt(stmt, …)` → `queryAssetContent` → `assetContentDB.Query(query)` directly, with no `CheckSingleStatement`/`CheckReadonlyStatement`. The `assetContentDB` DSN sets no `mode=ro`/`_query_only`, so the handle is read-write (same `88250/go-sqlite3` fork). **method 3 : unescaped REGEXP concatenation.** Dispatch → `assetContentFieldRegexp(exp)`, which writes `(name REGEXP '<exp>' OR content REGEXP '<exp>')` by concatenation with **no** `'` escaping. `exp` reaches it after only `filterQueryInvisibleChars` (strips invisible characters, not quotes). The parallel block-search builder `fieldRegexp` performs `ReplaceAll(regexp, "'", "''")` before wrapping, this asset builder omits that step. A single quote in `exp` breaks out of the literal into SQL context. The result runs via `SelectAssetContentsRawStmtNoParse` → `queryAssetContent` → direct `assetContentDB.Query`, again with no single/read-only guard. **Post-hoc filter.** `FilterAssetContentByPublishAccess` runs on the results after the query executes; it filters rows and does not constrain the statement (same timing as the accepted `searchDocs`/`searchEmbedBlock` findings). **Handle / stacking / scope.** Read-write asset-content DB, `88250/go-sqlite3` stacking-capable driver, `ATTACH` available. The asset-content store spans notebooks cross-boundary. ### Impact An unauthenticated request (publish mode with auth disabled) or any publish `RoleReader` can, via method 2, execute arbitrary SQL on the read-write asset-content database, and via method 3, inject SQL through the unescaped `REGEXP` clause. Both permit cross-notebook read disclosure of asset-content data and, via the read-write handle and statement stacking, modification of database content and `ATTACH`-reachable files. No admin role or write permission through the normal API is required. Code execution is not reachable in the default build (no `load_extension`). ### PoC Steps 1. Create a doc with a heading and secret body (6806, admin token) `curl -s -X POST http://127.0.0.1:6806/api/notebook/createNotebook -H "Content-Type: application/json" -H "Authorization: Token g4wj3r04ntobe9m4" -d "{\"name\":\"F3\"}"` Take the returned notebook id as BOX, then: `curl -s -X POST http://127.0.0.1:6806/api/filetree/createDocWithMd -H "Content-Type: application/json" -H "Authorization: Token g4wj3r04ntobe9m4" -d "{\"notebook\":\"BOX\",\"path\":\"/f3-secret\",\"markdown\":\"## SecretSection\n\nUNIQUE_MARKER_99 hidden body text\"}"` The returned string is the doc root id → DOC. 2. Get the heading block id (admin SQL on 68 `curl -s -X POST http://127.0.0.1:6806/api/notebook/createNotebook -H "Content-Type: application/json" -H "Authorization: Token g4wj3r04ntobe9m4" -d "{\"name\":\"F3\"}"` Take the returned notebook id as BOX, then: `curl -s -X POST http://127.0.0.1:6806/api/fintent-Type: application/json" -H"Authorization: Token g4wj3r04ntobe9m4" -d "{\"notebook\":\"BOX\",\"path\":\"/f3-secret\",\"markdown\":\"## SecretSection\n\nUNIQUE_MARKER_99 hidden body text\"}"` The returned string is the doc root id → DOC. 2. Get the heading block id (admin SQL on 6806) `curl -s -X POST http://127.0.0.1:6806/api/query/sql -H "Content-Type: application/json" -H "Authorization: Token g4wj3r04ntob

Impact

An attacker can remotely exploit this vulnerability without authentication to execute arbitrary SQL commands on the database. This can result in unauthorized disclosure, modification, or deletion of data across notebooks, severely compromising data confidentiality, integrity, and availability.

Summary

CVE-2026-69083 describes an SQL injection vulnerability in SiYuan note-taking software versions prior to v3.7.3. The issue exists in the fullTextSearchAssetContent endpoint, which is reachable by unauthenticated users. Attackers can exploit unescaped method parameters and REGEXP clauses to execute arbitrary SQL commands on the read-write asset-content database. This can lead to unauthorized reading, modification, or deletion of cross-notebook data. The vulnerability has a CVSS 4.0 score of 9.9, indicating critical severity with network attack vector, no privileges required, no user interaction, and high impact on confidentiality, integrity, and availability.

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 10 Aug 2026, 15:19 UTC

Public exploits and detectionGitHub proofs of concept

Technical details

References

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