PT-2026-105543 · Go · Github.Com/Siyuan-Note/Siyuan/Kernel

Publicado

2026-10-01

·

Atualizado

2026-10-01

CVSS v3.1

5.8

Média

VetorAV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N

Summary

/api/block/getRefIDs filters its results for reader roles through a helper that checks only the visibility tiers. The password tier is not checked, because the helper does not receive the request context and therefore cannot evaluate the publish auth cookie. A reader who has not entered a document's publish password learns that the document references a given block.
A function ten lines away in the same file does perform the full check, on the same input type.

Details

Route, identical at eef105683 (kernel/api/router.go:235) and dev a7ae96ce (:245):
go
ginServer.Handle("POST", "/api/block/getRefIDs", model.CheckAuth, getRefIDs)
No CheckReadonly, no CheckAdminRole.
The filter chain. getRefIDs (kernel/api/block.go:631) checks isEncryptedNotebookDeniedForPublish, calls model.GetBlockRefsInBox, then for read-only roles:
go
publishIgnore := model.GetInvisiblePublishAccess(publishAccess)
refDefs, originalRefBlockIDs = model.FilterRefDefsByPublishIgnore(publishIgnore, refDefs)
FilterRefDefsByPublishIgnore (kernel/model/publish access.go:1324) collects the reference and definition identifiers, resolves their block trees, and delegates the decision to FilterBlockTreesByPublishIgnore (:1314), whose entire body is:
go
for id, bt := range bts {
  if CheckPathAccessableByPublishIgnore(bt.BoxID, bt.Path, publishIgnore) {
    ret[id] = bt
  }
}
Inside that helper, CheckPublishAuthCookie, GetPathPasswordByPublishAccess, checkBlockTreeAccessableByPublishAccess and password all appear zero times.
The complete check exists in the same file. kernel/model/publish access.go:431:
go
func checkBlockTreeAccessableByPublishAccess(c *gin.Context, publishAccess PublishAccess, bt *treenode.BlockTree) bool {
  if bt == nil || IsEncryptedBoxDeniedByPublishAccess(bt.BoxID) {
    return false
  }
  publishIgnore := filterDisablePublishAccess(publishAccess)
  passwordID, password := GetPathPasswordByPublishAccess(bt.BoxID, bt.Path, publishAccess)
  return CheckPathAccessableByPublishIgnore(bt.BoxID, bt.Path, publishIgnore) &&
      (password == "" || CheckPublishAuthCookie(c, passwordID, password))
}
Same package, same file, same *treenode.BlockTree input. One takes the context and evaluates the password; the other does not receive it and structurally cannot.
Route-level contrast. The adjacent getChildBlocks and getTailChildBlocks both carry model.CheckAdminRole.
Note on a prior assessment. getRefIDs has been described as correctly filtered because it calls a publish-access filter. It does. The filter it calls covers the visibility tiers only.

Proof of Concept

Kernel 3.7.2, publish mode on port 6808, Publish.Auth.Enable false, anonymous client. A public document referenced from a second document whose publish tier was changed between runs. getRefIDs was called anonymously each time.
Tier of the referring documentAnonymous result
Publicreference returned (baseline)
Password-protectedreference still returned
Hidden[], filtered
Forbidden[], filtered
The hidden and forbidden rows confirm the filter runs and works. The password-protected row is the defect.

Impact

An anonymous reader in publish mode, or any publish RoleReader, learns that a password-protected document contains a reference to a given block, without entering that document's password, and receives the block identifiers involved.
Scoped precisely: the response carries identifiers only. type RefDefs { RefID string; DefIDs []string }, returned alongside originalRefBlockIDs, a map of identifier to identifier. There is no reference text, title or content. The disclosure is the existence of a relationship, plus identifiers usable as input to other endpoints.
Confidentiality only.

Suggested fix

Thread *gin.Context into FilterRefDefsByPublishIgnore and FilterBlockTreesByPublishIgnore, and use checkBlockTreeAccessableByPublishAccess in place of the bare CheckPathAccessableByPublishIgnore call, so the password tier and the encrypted-box check are both applied.

Correção

Incorrect Authorization

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Enumeração de Fraquezas

CWE-863

Identificadores relacionados

GHSA-VG99-7GJ7-2FR5

Produtos afetados

Github.Com/Siyuan-Note/Siyuan/Kernel