CVE-2026-72812

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

Score 6.5 from GitHub Security Advisory published 2026-08-14. a secondary CVSS source baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.5Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

SiYuan versions before v3.7.4 contain a missing authorization vulnerability in the /api/ref/refreshBacklink endpoint that allows anonymous readers to trigger persistent server-side writes. Attackers can invoke the endpoint with an attacker-controlled block ID to flush transaction queues, scan all references globally, and enqueue database writes, bypassing read-only protections and enabling resource amplification attacks.

CVSS v3
6.5
EG Score
6.5(medium)
EG Risk
34(Track)
EG Risk 34/100SSVC: Track

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
Severity65% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
20%
KEV
Not listed

Published

August 14, 2026

Last Modified

August 26, 2026

Advisory Details (2)

Auto-updated Aug 14, 2026
🔬 Proof of concept available. Patch available. Sources: github.
generic

SiYuan before v3.7.4 Missing Authorization via refreshBacklink | Advisories | VulnCheck

https://www.vulncheck.com/advisories/siyuan-before-missing-authorization-via-refreshbacklink
github Patch Available🟡 PoC Available

Missing authorization on refreshBacklink allows anonymous readers to trigger persistent server-side writes and unauthenticated resource amplification (publish mode) · Advisory · siyuan-note/siyuan · GitHub

https://github.com/siyuan-note/siyuan/security/advisories/GHSA-wgwx-479j-23vq

Vendor Advisories for CVE-2026-72812(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 rangeFixed inDependents
github.com/siyuan-note/siyuan/kernel—0.0.0-20260723002528-7d273c271ce1—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 65× 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.

  1. 2026-09-18 23:22 UTCEG score recompute
  2. 2026-09-18 19:28 UTCEPSS rescore
  3. 2026-09-18 00:24 UTCEG score recompute
  4. 2026-09-16 23:50 UTCEG score recompute
  5. 2026-09-16 14:08 UTCEPSS rescore
  6. 2026-09-16 05:15 UTCEPSS rescore
  7. 2026-09-15 21:52 UTCEG score recompute
  8. 2026-09-15 03:12 UTCEPSS rescore
  9. 2026-09-13 23:41 UTCEG score recompute
  10. 2026-09-13 00:43 UTCEG score recompute
  11. 2026-09-12 15:02 UTCEPSS rescore
  12. 2026-09-12 01:44 UTCEG score recompute
  13. 2026-09-11 14:53 UTCEPSS rescore
  14. 2026-09-11 02:46 UTCEG score recompute
  15. 2026-09-10 09:35 UTCEPSS rescore
  16. 2026-09-09 04:50 UTCEG score recompute
  17. 2026-09-08 22:01 UTCEPSS rescore
  18. 2026-09-07 23:44 UTCEG score recompute
  19. 2026-09-07 00:46 UTCEG score recompute
  20. 2026-09-06 13:48 UTCEPSS rescore
  21. 2026-09-06 01:16 UTCEG score recompute
  22. 2026-09-05 02:12 UTCEG score recompute
  23. 2026-09-04 05:07 UTCEPSS rescore
  24. 2026-09-03 03:32 UTCEG score recompute
  25. 2026-09-03 03:32 UTCGHSA enrichment
Show 62 more
  1. 2026-09-02 14:12 UTCEPSS rescore
  2. 2026-09-02 04:23 UTCEG score recompute
  3. 2026-09-02 04:22 UTCGHSA enrichment
  4. 2026-09-01 13:54 UTCEPSS rescore
  5. 2026-09-01 05:21 UTCEG score recompute
  6. 2026-09-01 05:21 UTCGHSA enrichment
  7. 2026-09-01 04:40 UTCEPSS rescore
  8. 2026-09-01 04:40 UTCEPSS rescore
  9. 2026-08-31 04:53 UTCEG score recompute
  10. 2026-08-31 04:53 UTCGHSA enrichment
  11. 2026-08-30 19:18 UTCEPSS rescore
  12. 2026-08-30 19:17 UTCEPSS rescore
  13. 2026-08-30 05:55 UTCEG score recompute
  14. 2026-08-30 05:55 UTCGHSA enrichment
  15. 2026-08-30 01:22 UTCEPSS rescore
  16. 2026-08-29 06:57 UTCEG score recompute
  17. 2026-08-29 06:57 UTCGHSA enrichment
  18. 2026-08-28 21:42 UTCEPSS rescore
  19. 2026-08-27 16:13 UTCGHSA enrichment
  20. 2026-08-26 17:14 UTCEG score recompute
  21. 2026-08-26 17:14 UTCGHSA enrichment
  22. 2026-08-26 14:47 UTCEPSS rescore
  23. 2026-08-26 07:52 UTCEG score recompute
  24. 2026-08-26 07:52 UTCGHSA enrichment
  25. 2026-08-25 13:49 UTCEPSS rescore
  26. 2026-08-25 08:54 UTCEG score recompute
  27. 2026-08-25 08:54 UTCGHSA enrichment
  28. 2026-08-24 09:56 UTCEG score recompute
  29. 2026-08-24 09:56 UTCGHSA enrichment
  30. 2026-08-23 10:58 UTCEG score recompute
  31. 2026-08-23 10:58 UTCGHSA enrichment
  32. 2026-08-23 00:19 UTCEPSS rescore
  33. 2026-08-22 12:00 UTCEG score recompute
  34. 2026-08-22 12:00 UTCGHSA enrichment
  35. 2026-08-21 23:49 UTCEPSS rescore
  36. 2026-08-21 13:02 UTCEG score recompute
  37. 2026-08-21 13:02 UTCGHSA enrichment
  38. 2026-08-20 22:56 UTCEPSS rescore
  39. 2026-08-20 14:03 UTCEG score recompute
  40. 2026-08-20 14:03 UTCGHSA enrichment
  41. 2026-08-19 17:04 UTCEPSS rescore
  42. 2026-08-19 14:35 UTCGHSA enrichment
  43. 2026-08-18 15:36 UTCEG score recompute
  44. 2026-08-18 15:36 UTCGHSA enrichment
  45. 2026-08-18 13:49 UTCEPSS rescore
  46. 2026-08-18 13:49 UTCEPSS rescore
  47. 2026-08-17 16:25 UTCEG score recompute
  48. 2026-08-17 16:25 UTCGHSA enrichment
  49. 2026-08-17 14:01 UTCEG score recompute
  50. 2026-08-17 14:01 UTCGHSA enrichment
  51. 2026-08-17 13:47 UTCEPSS rescore
  52. 2026-08-16 15:03 UTCEG score recompute
  53. 2026-08-16 15:03 UTCGHSA enrichment
  54. 2026-08-16 14:56 UTCEPSS rescore
  55. 2026-08-16 14:56 UTCEPSS rescore
  56. 2026-08-16 02:15 UTCEPSS rescore
  57. 2026-08-15 16:05 UTCGHSA enrichment
  58. 2026-08-14 17:07 UTCEG score recompute
  59. 2026-08-14 17:06 UTCGHSA enrichment
  60. 2026-08-14 12:22 UTCEG score recompute
  61. 2026-08-14 11:49 UTCEG score recompute
  62. 2026-08-14 11:49 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-72812?
CVE-2026-72812 is a medium vulnerability published on August 14, 2026. SiYuan versions before v3.7.4 contain a missing authorization vulnerability in the /api/ref/refreshBacklink endpoint that allows anonymous readers to trigger persistent server-side writes. Attackers can invoke the endpoint with an attacker-controlled block ID to flush transaction queues, scan all…
When was CVE-2026-72812 disclosed?
CVE-2026-72812 was first published in the National Vulnerability Database on August 14, 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-2026-72812 actively exploited?
CVE-2026-72812 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 79.9% of all scored CVEs.
What is the CVSS score of CVE-2026-72812?
CVE-2026-72812 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-72812?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-72812, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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