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: 0.4%CVSS: 6.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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
6.5MEDIUMmedium confidence
EG Risk
34
EG Risk 34/100CISA 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
Severity65% × 45%
Exploitation0% × 40%
Automatability30% × 15%
CISA SSVC: Track at low or medium mission impact; Track or 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
0.4%
EPSS %ILE
29th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track or 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 none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact partial (CVSS below 9.0). 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 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
githubMentions a patch (unverified)🟡 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 rangeFix by version rangeDependents
github.com/siyuan-note/siyuan/kernel—
  • every version up to 0.0.0-20260723002528-7d273c271ce1: fixed in 0.0.0-20260723002528-7d273c271ce1
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 41× 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 114 total refreshes for this CVE.

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

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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 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 0.4% probability of exploitation in the next 30 days (29th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-72812?
CVE-2026-72812 has a CVSS base score of 6.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-72812?
A fix for CVE-2026-72812 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-72812 are linked in the Vendor Advisories panel on this page.

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