Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

CVE-2026-72921— SeaweedFS: Filer JWT allowed_prefixes literal prefix match allows cross-tenant access to sibling paths

CVSS 8.1 · High EPSS 0.24% · P15

Possible ATT&CK Techniques 1AI

T1078.004 · Cloud Accounts

Affected Version Matrix 1

VendorProductVersion RangeStatus
seaweedfsseaweedfs< 4.24affected
Get alerts for future matching vulnerabilitiesLog in to subscribe

I. Basic Information for CVE-2026-72921

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
SeaweedFS: Filer JWT allowed_prefixes literal prefix match allows cross-tenant access to sibling paths
Source: CVE Program / CVE List V5
Vulnerability Description
SeaweedFS is a distributed storage system. Prior to 4.24, the weed/server/filer_server_handlers.go allowed_prefixes authorization check used strings.HasPrefix on raw path strings, so a filer JWT scoped to /tenant1 also authorized sibling paths such as /tenant1234, /tenant1-old, and /tenant1backup, enabling cross-tenant reads and writes with a valid scoped token. This issue is fixed in version 4.24.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
Source: CVE Program / CVE List V5

Affected Products

VendorProductAffected VersionsCPESubscribe
seaweedfsseaweedfs < 4.24 -

II. Public POCs for CVE-2026-72921

#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium
Qwen3.6-35B-A3B · 6372 chars
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
100+ AI POC generations per month

III. Intelligence Information for CVE-2026-72921

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-72921 (2)

Vendor Advisories for CVE-2026-72921 (1)

Vendor Pages for CVE-2026-72921 (1)

Same Patch Batch · seaweedfs · 2026-08-11 · 3 CVEs total

CVE-2026-729209.8 CRITICALSeaweedFS: Unauthenticated filer IAM gRPC service grants S3 administrative control
CVE-2026-730809.3 CRITICALSeaweedFS: Unauthenticated SSRF with response read-back via VolumeServer.FetchAndWriteNeed

IV. Related Vulnerabilities

Same product: seaweedfs
Same vendor: seaweedfs
Same weakness: CWE-863

V. Comments for CVE-2026-72921

No comments yet

Leave a comment