CVE-2026-82651

MEDIUMPre-NVD 4.94.9—
EchelonGraph scoreMEDIUM confidence

Score 4.9 from GitHub Security Advisory published 2026-08-30. A secondary CVSS source baseline 4.9; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
4.9EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 4.9Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

SiYuan before v3.8.1 does not apply the IsForbiddenAbsPath guard (introduced in GHSA-c8r8-95hg-mp34) to the /history/*path and /repo/diff/*path endpoints in kernel/server/serve.go. These routes require admin authentication but construct file paths independently, so an authenticated administrator can retrieve historical snapshots of sensitive files that the guard is meant to block, including data/.siyuan/publishAccess.json (plaintext publish-mode passwords) and files under data/templates/.

CVSS v3
4.9
EG Score
4.9MEDIUMmedium confidence
EG Risk
22
EG Risk 22/100CISA 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
Severity49% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.5%
EPSS %ILE
39th
KEV
Not listed

CISA SSVCTrack at every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (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 30, 2026

Last Modified

August 31, 2026

Advisory Details (2)

Auto-updated Aug 30, 2026
Patch available. Sources: github.
generic

SiYuan before v3.8.1 Missing Authorization via /history and /repo/diff | Advisories | VulnCheck

https://www.vulncheck.com/advisories/siyuan-before-3.8.1-missing-authorization-via-history-and-repo-diff
githubMentions a patch (unverified)

/history/*path and /repo/diff/*path were not updated to use the new IsForbiddenAbsPath guard added in GHSA-c8r8-95hg-mp34, potentially exposing historical snapshots of data/.siyuan/publishAccess.json (plaintext publish passwords) and data/templates/* · Advisory · siyuan-note/siyuan · GitHub

https://github.com/siyuan-note/siyuan/security/advisories/GHSA-3cm4-ccvw-6xr6

Vendor Advisories for CVE-2026-82651(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 0.0.0-20260816034002-035bf9a8c311: fixed in 0.0.0-20260816034002-035bf9a8c311
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 18× in last 7d / 80× 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. 2026-10-10 03:45 UTCEG score recompute
  3. 2026-10-10 03:44 UTCGHSA enrichment
  4. 2026-10-09 20:07 UTCEPSS rescore
  5. 2026-10-09 02:31 UTCEG score recompute
  6. 2026-10-09 02:31 UTCGHSA enrichment
  7. 2026-10-08 17:13 UTCEPSS rescore
  8. 2026-10-08 00:43 UTCEG score recompute
  9. 2026-10-08 00:43 UTCGHSA enrichment
  10. 2026-10-07 23:48 UTCEPSS rescore
  11. 2026-10-06 21:38 UTCEG score recompute
  12. 2026-10-06 21:38 UTCGHSA enrichment
  13. 2026-10-06 15:18 UTCEPSS rescore
  14. 2026-10-05 20:36 UTCEG score recompute
  15. 2026-10-05 20:36 UTCGHSA enrichment
  16. 2026-10-05 17:43 UTCEPSS rescore
  17. 2026-10-04 23:22 UTCEPSS rescore
  18. 2026-10-04 19:35 UTCGHSA enrichment
  19. 2026-10-03 16:00 UTCEG score recompute
  20. 2026-10-03 16:00 UTCGHSA enrichment
  21. 2026-10-03 14:26 UTCEPSS rescore
  22. 2026-10-02 17:57 UTCEPSS rescore
  23. 2026-10-02 14:46 UTCEG score recompute
  24. 2026-10-02 14:46 UTCGHSA enrichment
  25. 2026-10-01 19:50 UTCEPSS rescore
Show 75 more
  1. 2026-10-01 13:14 UTCEG score recompute
  2. 2026-10-01 13:14 UTCGHSA enrichment
  3. 2026-09-30 15:04 UTCEPSS rescore
  4. 2026-09-30 12:12 UTCEG score recompute
  5. 2026-09-30 12:12 UTCGHSA enrichment
  6. 2026-09-29 11:10 UTCEG score recompute
  7. 2026-09-29 11:10 UTCGHSA enrichment
  8. 2026-09-28 13:52 UTCEPSS rescore
  9. 2026-09-28 09:57 UTCEG score recompute
  10. 2026-09-28 09:57 UTCGHSA enrichment
  11. 2026-09-27 13:48 UTCEPSS rescore
  12. 2026-09-27 08:55 UTCEG score recompute
  13. 2026-09-27 08:55 UTCGHSA enrichment
  14. 2026-09-26 15:59 UTCEPSS rescore
  15. 2026-09-26 07:52 UTCEG score recompute
  16. 2026-09-26 07:52 UTCGHSA enrichment
  17. 2026-09-24 22:06 UTCEG score recompute
  18. 2026-09-24 22:06 UTCGHSA enrichment
  19. 2026-09-24 14:04 UTCEPSS rescore
  20. 2026-09-23 20:09 UTCEG score recompute
  21. 2026-09-23 20:09 UTCGHSA enrichment
  22. 2026-09-23 17:54 UTCEPSS rescore
  23. 2026-09-22 19:07 UTCEG score recompute
  24. 2026-09-22 19:07 UTCGHSA enrichment
  25. 2026-09-22 16:01 UTCEPSS rescore
  26. 2026-09-21 21:09 UTCEPSS rescore
  27. 2026-09-21 18:05 UTCEG score recompute
  28. 2026-09-21 18:05 UTCGHSA enrichment
  29. 2026-09-20 20:16 UTCEPSS rescore
  30. 2026-09-20 17:03 UTCGHSA enrichment
  31. 2026-09-19 16:01 UTCEG score recompute
  32. 2026-09-19 16:01 UTCGHSA enrichment
  33. 2026-09-18 19:28 UTCEPSS rescore
  34. 2026-09-18 14:51 UTCEG score recompute
  35. 2026-09-18 14:51 UTCGHSA enrichment
  36. 2026-09-17 13:49 UTCEG score recompute
  37. 2026-09-17 13:49 UTCGHSA enrichment
  38. 2026-09-16 14:08 UTCEPSS rescore
  39. 2026-09-16 12:47 UTCEG score recompute
  40. 2026-09-16 12:46 UTCGHSA enrichment
  41. 2026-09-16 05:15 UTCEPSS rescore
  42. 2026-09-15 11:45 UTCEG score recompute
  43. 2026-09-15 11:45 UTCGHSA enrichment
  44. 2026-09-15 03:12 UTCEPSS rescore
  45. 2026-09-15 03:12 UTCEPSS rescore
  46. 2026-09-14 10:43 UTCEG score recompute
  47. 2026-09-14 10:43 UTCGHSA enrichment
  48. 2026-09-13 09:41 UTCEG score recompute
  49. 2026-09-13 09:41 UTCGHSA enrichment
  50. 2026-09-12 08:40 UTCEG score recompute
  51. 2026-09-12 08:40 UTCGHSA enrichment
  52. 2026-09-11 14:53 UTCEPSS rescore
  53. 2026-09-11 14:53 UTCEPSS rescore
  54. 2026-09-11 07:38 UTCEG score recompute
  55. 2026-09-11 07:37 UTCGHSA enrichment
  56. 2026-09-10 06:35 UTCGHSA enrichment
  57. 2026-09-09 05:33 UTCEG score recompute
  58. 2026-09-09 05:33 UTCGHSA enrichment
  59. 2026-09-08 22:01 UTCEPSS rescore
  60. 2026-09-08 04:28 UTCEG score recompute
  61. 2026-09-08 04:28 UTCGHSA enrichment
  62. 2026-09-07 03:25 UTCEG score recompute
  63. 2026-09-07 03:25 UTCGHSA enrichment
  64. 2026-09-06 13:48 UTCEPSS rescore
  65. 2026-09-06 02:23 UTCEG score recompute
  66. 2026-09-06 02:23 UTCGHSA enrichment
  67. 2026-09-05 15:31 UTCEPSS rescore
  68. 2026-09-05 01:21 UTCEG score recompute
  69. 2026-09-05 01:21 UTCGHSA enrichment
  70. 2026-09-04 05:07 UTCEPSS rescore
  71. 2026-09-04 00:18 UTCGHSA enrichment
  72. 2026-09-02 23:13 UTCEG score recompute
  73. 2026-09-02 23:13 UTCGHSA enrichment
  74. 2026-09-02 14:12 UTCEPSS rescore
  75. 2026-09-01 22:11 UTCEG score recompute

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Frequently asked(5)

What is CVE-2026-82651?
CVE-2026-82651 is a medium vulnerability published on August 30, 2026. SiYuan before v3.8.1 does not apply the IsForbiddenAbsPath guard (introduced in GHSA-c8r8-95hg-mp34) to the /history/path and /repo/diff/path endpoints in kernel/server/serve.go. These routes require admin authentication but construct file paths independently, so an authenticated administrator can…
When was CVE-2026-82651 disclosed?
CVE-2026-82651 was first published on August 30, 2026, with the most recent update on August 31, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-82651 actively exploited?
CVE-2026-82651 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (39th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-82651?
CVE-2026-82651 has a CVSS base score of 4.9 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-82651?
A fix for CVE-2026-82651 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-82651 are linked in the Vendor Advisories panel on this page.

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