CVE-2026-100413 SeaweedFS: Hard-coded SSH host key can be presented by certain standalone SFTP Helm deployments
Attackers can impersonate SFTP endpoints using a hardcoded SSH key in specific Helm deployments, exposing credentials and data to interception.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-100413?
CVE-2026-100413 is a high-severity vulnerability in seaweedfs, published on 14 Oct 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
SeaweedFS is a distributed storage system for files and blobs. From 4.0.388 until 4.41, the SFTP Helm chart embedded one unencrypted Ed25519 private host key in k8s/charts/seaweedfs/templates/sftp/sftp-secret.yaml as stringData.seaweedfs_sftp_ssh_private_key. A standalone deployment presented that public key when sftp.enabled and sftp.enableAuth were true, sftp.existingConfigSecret was not supplied, the legacy sftp.sshPrivateKey path remained selected, a valid config-ssh Secret allowed startup, and hostKeysFolder did not provide a later Ed25519 signer. An attacker able to redirect or intercept client traffic could impersonate that SFTP endpoint to clients that trusted the published host identity, exposing password credentials or data sent to the rogue endpoint. Default all-in-one and non-authenticated standalone paths did not load the key. This issue is fixed in version 4.41.
Weakness: CWE-321
Which versions are affected by CVE-2026-100413?
1 open source package ship an affected version, including seaweedfs. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
seaweedfs Bitnami | From 4.0.388 | 4.41.0 |
Products include Seaweedfs Seaweedfs.
How do I fix CVE-2026-100413?
Upgrade seaweedfs to 4.41.0 or later.
Is CVE-2026-100413 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-100413 exists.
Other vulnerabilities in seaweedfs
Sources
Also known as BIT-seaweedfs-2026-100413, GHSA-hqp5-j79g-vr89.