CVE-2026-54917: SeaweedFS is a distributed storage system for object storage (S3), file systems, and Iceberg tables

Q: How do I fix CVE-2026-54917?

seaweedfs: upgrade to 4.30. Exact commands for each OS are on this page.

Q: Is CVE-2026-54917 being exploited?

CVE-2026-54917 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-54917 affect?

CVE-2026-54917 affects seaweedfs. Severity is critical (CVSS 10.0). SeaweedFS is a distributed storage system for object storage (S3), file systems, and Iceberg tables. Prior to 4.30, the S3 API gateway and the Iceberg REST catalog gateway construct their routers with mux.NewRouter().SkipClean(true). With p

Q: How urgent is CVE-2026-54917?

Priority 64/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

CRITICAL 10.0REMOTEUPGRADE

CVE-2026-54917 is a critical-severity flaw (CVSS 10.0) affecting seaweedfs. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

SeaweedFS is a distributed storage system for object storage (S3), file systems, and Iceberg tables. Prior to 4.30, the S3 API gateway and the Iceberg REST catalog gateway construct their routers with mux.NewRouter().SkipClean(true). With path cleaning disabled, a .. segment inside the URL survives routing, so a request such as `GET /bucket-A/../evil-bucket/key`, is matched as bucket=bucket-A, object=../evil-bucket/key. The captured object key is

Why this priority

Critical severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	10.0 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.6% (top 24%)
CISA exploited list	No
Weakness	CWE-22
Published	2026-06-25
Last modified	2026-06-29

Publisher (CNA): GitHub, Inc. · Vendor: seaweedfs

Last updated 2026-06-29 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-25 19:16 UTCPublished CVE record published
2026-06-29 21:21 UTCUpdated Record last modified

seaweedfs seaweedfs UPGRADE

Affected: < 4.30

Fixed in: 4.30

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy seaweedfs || rpm -q seaweedfs || seaweedfs --version

2. UPGRADE to 4.30 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade seaweedfs

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade seaweedfs

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Exact fixes by distribution

Go · github.com/seaweedfs/seaweedfs · FIXED · 0.0.0-20260526080459-dd1b4287899e · vulnerable: < 0.0.0-20260526080459-dd1b4287899e · source

go get github.com/seaweedfs/seaweedfs@v0.0.0-20260526080459-dd1b4287899e go list -m github.com/seaweedfs/seaweedfs

Fedora 46 · python3.11 · FIXED · 3.11.18-1.fc46 · FEDORA-2026-cc775894f4 · source

sudo dnf upgrade --advisory=FEDORA-2026-cc775894f4

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

GitHub PoC: BiiTts/CVE-2026-54917-SeaweedFS-Cross-Bucket-Traversal (0 stars)
Write-up: github.com/seaweedfs/seaweedfs/security/advisories/GHSA-w62w-66v9-vvgv
Nuclei scan template: SeaweedFS <= 4.29 - Path Traversal File Write

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-54917?

seaweedfs: upgrade to 4.30. Exact commands for each OS are on this page.

Is CVE-2026-54917 being exploited?

CVE-2026-54917 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-54917 affect?

CVE-2026-54917 affects seaweedfs. Severity is critical (CVSS 10.0). SeaweedFS is a distributed storage system for object storage (S3), file systems, and Iceberg tables. Prior to 4.30, the S3 API gateway and the Iceberg REST catalog gateway construct their routers with mux.NewRouter().SkipClean(true). With p

How urgent is CVE-2026-54917?

Priority 64/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

References

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