CVE-2026-68586

HIGHPre-NVD 8.68.6—
EchelonGraph scoreMEDIUM confidence

Score 8.6 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-03. a secondary CVSS source baseline 8.6; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
8.6EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.6Exploit: None knownExposed: 0

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

SiYuan before v3.7.3 fails to apply publish-access filters to the getBacklinkDoc and getBackmentionDoc content endpoints (/api/ref/getBacklinkDoc and /api/ref/getBackmentionDoc). While the corresponding backlink list endpoints filter publish-forbidden documents, the content endpoints (gated only by CheckAuth) do not. A publish-mode reader — including an anonymous reader when publish Basic Auth is disabled — can call these endpoints directly with a publish-forbidden document's ID to retrieve its rendered DOM content and to determine whether the document references a given block (a reference-existence oracle).

CVSS v3
8.6
EG Score
8.6(medium)
EG Risk
54(Track)
EG Risk 54/100SSVC: 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
Severity86% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
16%
KEV
Not listed

Published

August 3, 2026

Last Modified

August 26, 2026

Advisory Details (2)

Auto-updated Aug 3, 2026
🔬 Proof of concept available. Patch available. Sources: github.
generic

SiYuan before v3.7.3 Content Disclosure via getBacklinkDoc | Advisories | VulnCheck

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

Cross-boundary content disclosure via getBacklinkDoc/getBackmentionDoc (publish mode): reader-reachable rendered DOM of publish-forbidden docs; sibling list endpoints are filtered · Advisory · siyuan-note/siyuan · GitHub

https://github.com/siyuan-note/siyuan/security/advisories/GHSA-36v8-mpjm-8j5r

Vendor Advisories for CVE-2026-68586(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—0.0.0-20260721014413-f45749a7ef6e—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 10× in last 7d / 68× 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 141 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-68586?
CVE-2026-68586 is a high vulnerability published on August 3, 2026. SiYuan before v3.7.3 fails to apply publish-access filters to the getBacklinkDoc and getBackmentionDoc content endpoints (/api/ref/getBacklinkDoc and /api/ref/getBackmentionDoc). While the corresponding backlink list endpoints filter publish-forbidden documents, the content endpoints (gated only by…
When was CVE-2026-68586 disclosed?
CVE-2026-68586 was first published in the National Vulnerability Database on August 3, 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-2026-68586 actively exploited?
CVE-2026-68586 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 84.4% of all scored CVEs.
What is the CVSS score of CVE-2026-68586?
CVE-2026-68586 has a CVSS v3 base score of 8.6 (NVD).
How do I remediate CVE-2026-68586?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-68586, 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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