What’s Vulnerable › Vulnerabilities

CVE-2026-56768: Seahub < 13.0.23 - Authentication Bypass in ShareLinkZipTaskView GET Method

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-25 · updated 2026-10-25
• Weakness: CWE-862

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 products

• haiwen seahub: before 13.0.23 — fixed in 13.0.23

How to fix

Upgrade to a fixed version: haiwen seahub 13.0.23. Check the vendor advisory for mitigations.

References

• https://github.com/haiwen/seahub/commit/162cddae0831188d02bb8d451dc2193e197dcc57
• https://github.com/haiwen/seahub/commit/b609949cf64ed6a15708d0fb5ea9c179962e23cc
• https://github.com/haiwen/seahub/issues/9050
• https://plus.seafile.com/wiki/publish/seafile-wiki/v5D5/
• https://www.vulncheck.com/advisories/seahub-authentication-bypass-in-sharelinkziptaskview-get-method

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