CVE-2026-72803

MEDIUMPre-NVD 5.85.8—
EchelonGraph scoreMEDIUM confidence

Score 5.8 from GitHub Security Advisory published 2026-08-12. A secondary CVSS source baseline 5.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Elevated
5.8EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 5.8Exploit: Elevated riskExposed services: Not assessed

A fix is available — apply it.

SiYuan versions before v3.7.4 fail to enforce publish-access checks in the getBlockAttrs and batchGetBlockAttrs endpoints. Attackers can retrieve block attributes including names, aliases, memos, and custom fields from protected documents by sending POST requests with block IDs.

CVSS v3
5.8
EG Score
5.8MEDIUMmedium confidence
EG Risk
57
EG Risk 57/100CISA 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
Severity58% × 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
0.3%
EPSS %ILE
23rd
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 12, 2026

Last Modified

August 26, 2026

Advisory Details (2)

Auto-updated Aug 12, 2026
🔬 Proof of concept available. Patch available. Sources: github.
generic

SiYuan before v3.7.4 Information Disclosure via getBlockAttrs | Advisories | VulnCheck

https://www.vulncheck.com/advisories/siyuan-before-information-disclosure-via-getblockattrs
github Patch Available🟡 PoC Available

Missing publish-access filter on getBlockAttrs and batchGetBlockAttrs discloses block attributes (name, alias, memo, custom fields) of protected documents (publish mode) · Advisory · siyuan-note/siyuan · GitHub

https://github.com/siyuan-note/siyuan/security/advisories/GHSA-qvq9-hq6p-v378

Vendor Advisories for CVE-2026-72803(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 0.0.0-20260724093256-229fdffd7e4a: fixed in 0.0.0-20260724093256-229fdffd7e4a
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 6× in last 7d / 42× 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 111 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-72803?
CVE-2026-72803 is a medium vulnerability published on August 12, 2026. SiYuan versions before v3.7.4 fail to enforce publish-access checks in the getBlockAttrs and batchGetBlockAttrs endpoints. Attackers can retrieve block attributes including names, aliases, memos, and custom fields from protected documents by sending POST requests with block IDs.
When was CVE-2026-72803 disclosed?
CVE-2026-72803 was first published on August 12, 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-2026-72803 actively exploited?
CVE-2026-72803 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (23rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-72803?
CVE-2026-72803 has a CVSS base score of 5.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-72803?
A fix for CVE-2026-72803 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-72803 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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