CVE-2026-74904

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-08-18. A secondary CVSS source baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 7.5Exploit: Elevated riskExposed services: Not assessed

A fix is available — apply it.

SiYuan before v3.7.4 is missing authorization checks in 17 block metadata/content endpoints in kernel/api/block.go (including getRefText, checkBlockExist, and getBlockBreadcrumb). These handlers are gated only by basic authentication (model.CheckAuth) and lack publish-access filtering, allowing anonymous publish-mode readers to disclose private block content-derived text, structural metadata, and existence information for arbitrary block IDs across the workspace.

CVSS v3
7.5
EG Score
7.5HIGHmedium confidence
EG Risk
65
EG Risk 65/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity75% × 45%
Exploitation40% × 40%
Automatability100% × 15%
CISA SSVC: Track at low or medium mission impact; Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.5%
EPSS %ILE
40th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 18, 2026

Last Modified

August 26, 2026

Advisory Details (2)

Auto-updated Aug 18, 2026
Patch available. Sources: github.
generic

SiYuan before v3.7.4 Missing Authorization via block API | Advisories | VulnCheck

https://www.vulncheck.com/advisories/siyuan-before-missing-authorization-via-block-api
github Patch Available

17 block metadata/content endpoints in kernel/api/block.go (getRefText, getBlockBreadcrumb, checkBlockExist, and 14 others) have zero publish-access filtering, reachable by anonymous publish-mode readers · Advisory · siyuan-note/siyuan · GitHub

https://github.com/siyuan-note/siyuan/security/advisories/GHSA-4vpg-gwqq-w44c

Vendor Advisories for CVE-2026-74904(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(1 across 1 ecosystem)
Go(1)
PackageVulnerable rangeFix by version rangeDependents
github.com/siyuan-note/siyuan/kernel—
  • every version up to 0.0.0-20260804015139-bd067a4fe9b2: fixed in 0.0.0-20260804015139-bd067a4fe9b2
—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 16× in last 7d / 94× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 170 total refreshes for this CVE.

  1. 2026-10-04 23:22 UTCEPSS rescore
  2. 2026-10-03 17:44 UTCEG score recompute
  3. 2026-10-03 14:26 UTCEPSS rescore
  4. 2026-10-02 15:43 UTCGHSA enrichment
  5. 2026-10-02 01:32 UTCEG score recompute
  6. 2026-10-02 01:32 UTCGHSA enrichment
  7. 2026-10-01 19:50 UTCEPSS rescore
  8. 2026-10-01 09:57 UTCGHSA enrichment
  9. 2026-09-30 21:56 UTCEG score recompute
  10. 2026-09-30 21:56 UTCGHSA enrichment
  11. 2026-09-30 09:55 UTCEG score recompute
  12. 2026-09-30 09:55 UTCGHSA enrichment
  13. 2026-09-29 15:24 UTCEPSS rescore
  14. 2026-09-28 21:58 UTCEG score recompute
  15. 2026-09-28 21:58 UTCGHSA enrichment
  16. 2026-09-28 13:52 UTCEPSS rescore
  17. 2026-09-28 09:37 UTCGHSA enrichment
  18. 2026-09-27 21:37 UTCEG score recompute
  19. 2026-09-27 21:36 UTCGHSA enrichment
  20. 2026-09-27 13:48 UTCEPSS rescore
  21. 2026-09-27 08:03 UTCEG score recompute
  22. 2026-09-27 08:03 UTCGHSA enrichment
  23. 2026-09-26 15:59 UTCEPSS rescore
  24. 2026-09-26 00:28 UTCEPSS rescore
  25. 2026-09-25 01:44 UTCEG score recompute
Show 75 more
  1. 2026-09-25 01:44 UTCGHSA enrichment
  2. 2026-09-24 14:04 UTCEPSS rescore
  3. 2026-09-24 12:13 UTCGHSA enrichment
  4. 2026-09-24 00:11 UTCEG score recompute
  5. 2026-09-24 00:11 UTCGHSA enrichment
  6. 2026-09-23 17:54 UTCEPSS rescore
  7. 2026-09-23 12:04 UTCGHSA enrichment
  8. 2026-09-23 00:03 UTCEG score recompute
  9. 2026-09-23 00:03 UTCGHSA enrichment
  10. 2026-09-22 16:01 UTCEPSS rescore
  11. 2026-09-22 12:02 UTCGHSA enrichment
  12. 2026-09-22 00:01 UTCEG score recompute
  13. 2026-09-22 00:01 UTCGHSA enrichment
  14. 2026-09-21 21:09 UTCEPSS rescore
  15. 2026-09-21 11:59 UTCGHSA enrichment
  16. 2026-09-20 23:45 UTCEG score recompute
  17. 2026-09-20 23:45 UTCGHSA enrichment
  18. 2026-09-20 20:16 UTCEPSS rescore
  19. 2026-09-20 11:00 UTCGHSA enrichment
  20. 2026-09-19 22:59 UTCEG score recompute
  21. 2026-09-19 22:59 UTCGHSA enrichment
  22. 2026-09-19 10:57 UTCGHSA enrichment
  23. 2026-09-18 22:05 UTCEG score recompute
  24. 2026-09-18 22:05 UTCGHSA enrichment
  25. 2026-09-18 19:28 UTCEPSS rescore
  26. 2026-09-18 10:03 UTCGHSA enrichment
  27. 2026-09-17 22:02 UTCEG score recompute
  28. 2026-09-17 22:02 UTCGHSA enrichment
  29. 2026-09-17 10:01 UTCGHSA enrichment
  30. 2026-09-16 21:59 UTCEG score recompute
  31. 2026-09-16 21:59 UTCGHSA enrichment
  32. 2026-09-16 14:08 UTCEPSS rescore
  33. 2026-09-16 05:15 UTCEPSS rescore
  34. 2026-09-16 04:53 UTCGHSA enrichment
  35. 2026-09-15 15:57 UTCGHSA enrichment
  36. 2026-09-15 03:56 UTCEG score recompute
  37. 2026-09-15 03:55 UTCGHSA enrichment
  38. 2026-09-15 03:12 UTCEPSS rescore
  39. 2026-09-14 15:53 UTCGHSA enrichment
  40. 2026-09-14 03:52 UTCEG score recompute
  41. 2026-09-14 03:52 UTCGHSA enrichment
  42. 2026-09-13 15:51 UTCGHSA enrichment
  43. 2026-09-13 03:50 UTCGHSA enrichment
  44. 2026-09-12 15:48 UTCEG score recompute
  45. 2026-09-12 15:48 UTCGHSA enrichment
  46. 2026-09-12 15:02 UTCEPSS rescore
  47. 2026-09-12 03:47 UTCGHSA enrichment
  48. 2026-09-11 15:46 UTCEG score recompute
  49. 2026-09-11 15:46 UTCGHSA enrichment
  50. 2026-09-11 14:53 UTCEPSS rescore
  51. 2026-09-11 03:45 UTCGHSA enrichment
  52. 2026-09-10 15:44 UTCEG score recompute
  53. 2026-09-10 15:44 UTCGHSA enrichment
  54. 2026-09-10 09:35 UTCEPSS rescore
  55. 2026-09-10 03:39 UTCGHSA enrichment
  56. 2026-09-09 15:37 UTCGHSA enrichment
  57. 2026-09-09 03:33 UTCEG score recompute
  58. 2026-09-09 03:33 UTCGHSA enrichment
  59. 2026-09-08 22:01 UTCEPSS rescore
  60. 2026-09-08 04:12 UTCGHSA enrichment
  61. 2026-09-07 16:10 UTCEG score recompute
  62. 2026-09-07 16:10 UTCGHSA enrichment
  63. 2026-09-07 00:40 UTCEG score recompute
  64. 2026-09-07 00:40 UTCGHSA enrichment
  65. 2026-09-06 13:48 UTCEPSS rescore
  66. 2026-09-06 12:39 UTCGHSA enrichment
  67. 2026-09-06 00:38 UTCEG score recompute
  68. 2026-09-06 00:38 UTCGHSA enrichment
  69. 2026-09-05 12:36 UTCGHSA enrichment
  70. 2026-09-05 00:11 UTCEG score recompute
  71. 2026-09-05 00:10 UTCGHSA enrichment
  72. 2026-09-04 11:08 UTCEG score recompute
  73. 2026-09-04 11:08 UTCGHSA enrichment
  74. 2026-09-04 05:07 UTCEPSS rescore
  75. 2026-09-03 22:36 UTCGHSA enrichment

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Frequently asked(5)

What is CVE-2026-74904?
CVE-2026-74904 is a high vulnerability published on August 18, 2026. SiYuan before v3.7.4 is missing authorization checks in 17 block metadata/content endpoints in kernel/api/block.go (including getRefText, checkBlockExist, and getBlockBreadcrumb). These handlers are gated only by basic authentication (model.CheckAuth) and lack publish-access filtering, allowing…
When was CVE-2026-74904 disclosed?
CVE-2026-74904 was first published on August 18, 2026, with the most recent update on August 26, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-74904 actively exploited?
CVE-2026-74904 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (40th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-74904?
CVE-2026-74904 has a CVSS base score of 7.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-74904?
A fix for CVE-2026-74904 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-74904 are linked in the Vendor Advisories panel on this page.

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