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No exploitation reportedFix available

CVE-2026-72921

No exploitation reported by the sources we read.

  • Published2026-08-11
  • Fixed in4.24.0
  • WeaknessCWE-863

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC
  1. 2026-08-1115:17CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-30 09:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2026-72921?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-72921?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

OSV
seaweedfs
BranchAffectedFixed in
4.24< 4.24.04.24.0
seaweedfs/seaweedfs
BranchAffectedFixed in
0.0< 0.0.0-20260512171048-05ed5c9ae8a20.0.0-20260512171048-05ed5c9ae8a2

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

  1. Update seaweedfs to 4.24.0

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub

Sources

  • NVDCVE recordread 2026-10-23
  • CISA-ADPSSVC decisionnone2026-08-13
  • OpenCVESSVC decisionnone—
  • CNACVSS 3.18.1read 2026-10-23
  • CNAweakness (CWE)CWE-863read 2026-10-23
  • FIRST EPSSEPSS score0.4 %2026-10-29
  • OSVaffected packages—

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Published
2026-08-11
Last Modified
2026-09-09
NVD status
Deferred

Frequently asked questions

What is CVE-2026-72921?

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.

Is CVE-2026-72921 actively exploited?

Active exploitation of CVE-2026-72921 has not been confirmed. Its EPSS score was 0.4% on 2026-10-29, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-72921?

CVE-2026-72921 has a CVSS v3 base score of 8.1 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.

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