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CVE-2026-56768

Seahub < 13.0.23 - Authentication Bypass in ShareLinkZipTaskView GET Method

HIGH
8.8
CVSS Score
Published: June 25, 2026 at 06:05 PM UTC
Updated: October 25, 2026 at 10:10 PM UTC
1 product affected across 1 vendorSeahub

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Severity
HIGH8.8
Exploit prediction
EPSS 0.7%
SSVC
No known exploit

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Seahub· Haiwen
90%
v < 13.0.23
Affected range stops below 13.0.23, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (5)

Release Notes
Source: cverecord
https://plus.seafile.com/wiki/publish/seafile-wiki/v5D5/
Issue Tracking
Source: cverecord
https://github.com/haiwen/seahub/issues/9050
Patch
Source: cverecord
https://github.com/haiwen/seahub/commit/b609949cf64ed6a15708d0fb5ea9c179962e23cc
Patch
Source: cverecord
https://github.com/haiwen/seahub/commit/162cddae0831188d02bb8d451dc2193e197dcc57
Third Party Advisory
Source: cverecord
https://www.vulncheck.com/advisories/seahub-authentication-bypass-in-sharelinkziptaskview-get-method

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.8HIGHVulnCheck
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-862

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