CVE-2026-56768 json
Seahub < 13.0.23 - Authentication Bypass in ShareLinkZipTaskView GET Method
published 2026-06-25 4 mo ago modified 2026-10-25 14 d ago also EUVD-2026-39520
- cvss
- 8.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.7%
- EPSS 0.7% chance of exploitation in 30 days, percentile 53%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- haiwen seahub 13.0.23
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 4 mo ago
Exploit prediction
0.71% chance of exploitation in the next 30 days, higher than 53% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 8.7 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N |
| CNA | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| CNA | 4.0 | 8.7 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
Affected products
- haiwen seahub
Classification
- Weakness
-
- CWE-862 Missing Authorization
References
-
github.com
/haiwen/seahub/commit/b609949cf64ed6a15708d0fb5ea9c179962e23cc
patch
-
github.com
/haiwen/seahub/commit/162cddae0831188d02bb8d451dc2193e197dcc57
patch
-
plus.seafile.com
/wiki/publish/seafile-wiki/v5D5/
release-notes
-
github.com
/haiwen/seahub/issues/9050
issue-tracking
-
vulncheck.com
/advisories/seahub-authentication-bypass-in-sharelinkziptaskview-get-method
third-party-advisory
Sources
- CVE List CVE-2026-56768
- NVD CVE-2026-56768
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.