CVE-2026-56768

HIGHPre-NVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-06-25. a secondary CVSS source baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 8.8Exploit: None knownExposed: 0

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

Seahub before 13.0.23 does not enforce SHARE_LINK_LOGIN_REQUIRED on GET /api/v2.1/share-link-zip-task/, allowing unauthenticated users to bypass authentication. Attackers with a folder share-link token can call the GET endpoint to obtain a fileserver zip token and download entire shared directory trees.

CVSS v3
8.8
EG Score
8.8(medium)
EG Risk
40(Track)
EG Risk 40/100SSVC: 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
Severity88% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
52%
KEV
Not listed

Published

June 25, 2026

Last Modified

July 14, 2026

Advisory Details (5)

Auto-updated Jun 25, 2026
Upstream fix merged — awaiting tagged release. Sources: github_commit.
generic

Seahub < 13.0.23 - Authentication Bypass in ShareLinkZipTaskView GET Method | Advisories | VulnCheck

https://www.vulncheck.com/advisories/seahub-authentication-bypass-in-sharelinkziptaskview-get-method
generic

Seafile Wiki

https://plus.seafile.com/wiki/publish/seafile-wiki/v5D5/
generic

[Security] SHARE_LINK_LOGIN_REQUIRED bypass on GET /api/v2.1/share-link-zip-task/ · Issue #9050 · haiwen/seahub · GitHub

https://github.com/haiwen/seahub/issues/9050
github_commit

commit b609949cf64e (haiwen/seahub)

Fix landed in haiwen/seahub commit b609949cf64e — awaiting tagged release

https://github.com/haiwen/seahub/commit/b609949cf64ed6a15708d0fb5ea9c179962e23cc
github_commit

commit 162cddae0831 (haiwen/seahub)

Fix landed in haiwen/seahub commit 162cddae0831 — awaiting tagged release

https://github.com/haiwen/seahub/commit/162cddae0831188d02bb8d451dc2193e197dcc57

Vendor Advisories for CVE-2026-56768(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 5× in last 7d / 62× 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 219 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-56768?
CVE-2026-56768 is a high vulnerability published on June 25, 2026. Seahub before 13.0.23 does not enforce SHARELINKLOGIN_REQUIRED on GET /api/v2.1/share-link-zip-task/, allowing unauthenticated users to bypass authentication. Attackers with a folder share-link token can call the GET endpoint to obtain a fileserver zip token and download entire shared directory…
When was CVE-2026-56768 disclosed?
CVE-2026-56768 was first published in the National Vulnerability Database on June 25, 2026, with the most recent update on July 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-56768 actively exploited?
CVE-2026-56768 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 48.5% of all scored CVEs.
What is the CVSS score of CVE-2026-56768?
CVE-2026-56768 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-56768?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-56768, 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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