CVE-2026-100413
SeaweedFS: Hard-coded SSH host key can be presented by certain standalone SFTP Helm deployments
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.
INFO
Published Date :
Oct. 14, 2026, 6:17 p.m.
Last Modified :
Oct. 29, 2026, 6:43 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 4.0 | HIGH | [email protected] |
Solution
- Update SeaweedFS to version 4.41 or later.
- Review and update SFTP Helm chart configurations.
- Remove or secure the embedded private key.
- Ensure hostKeysFolder is properly configured.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-100413.
| URL | Resource |
|---|---|
| https://github.com/seaweedfs/seaweedfs/commit/742bd9f3aa9d9b83c9ad71389f66566f930acaa9 | Patch |
| https://github.com/seaweedfs/seaweedfs/pull/10390 | Issue Tracking Patch |
| https://github.com/seaweedfs/seaweedfs/releases/tag/4.41 | Release Notes |
| https://github.com/seaweedfs/seaweedfs/security/advisories/GHSA-hqp5-j79g-vr89 | Vendor Advisory Mitigation Exploit |
| https://github.com/seaweedfs/seaweedfs/security/advisories/GHSA-hqp5-j79g-vr89 | Vendor Advisory Mitigation Exploit |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-100413 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-100413
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-100413 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-100413 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Oct. 29, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N Added CPE Configuration OR *cpe:2.3:a:seaweedfs:seaweedfs:*:*:*:*:*:*:*:* versions from (including) 3.88 up to (excluding) 4.41 Added Reference Type GitHub, Inc.: https://github.com/seaweedfs/seaweedfs/commit/742bd9f3aa9d9b83c9ad71389f66566f930acaa9 Types: Patch Added Reference Type GitHub, Inc.: https://github.com/seaweedfs/seaweedfs/pull/10390 Types: Issue Tracking, Patch Added Reference Type GitHub, Inc.: https://github.com/seaweedfs/seaweedfs/releases/tag/4.41 Types: Release Notes Added Reference Type CISA-ADP: https://github.com/seaweedfs/seaweedfs/security/advisories/GHSA-hqp5-j79g-vr89 Types: Exploit, Mitigation, Vendor Advisory Added Reference Type GitHub, Inc.: https://github.com/seaweedfs/seaweedfs/security/advisories/GHSA-hqp5-j79g-vr89 Types: Exploit, Mitigation, Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Oct. 29, 2026
Action Type Old Value New Value Added Reference https://github.com/seaweedfs/seaweedfs/security/advisories/GHSA-hqp5-j79g-vr89 Added SSVC {'id': 'CVE-2026-100413', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-10-29T13:52:25.866438Z'} -
New CVE Received by [email protected]
Oct. 14, 2026
Action Type Old Value New Value Added 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. Added CVSS V4.0 AV:N/AC:H/AT:P/PR:N/UI:A/VC:H/VI:L/VA:N/SC:H/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-321 Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/100xxx/CVE-2026-100413.json">CVE-2026-100413</a> Added Reference https://github.com/seaweedfs/seaweedfs/commit/742bd9f3aa9d9b83c9ad71389f66566f930acaa9 Added Reference https://github.com/seaweedfs/seaweedfs/pull/10390 Added Reference https://github.com/seaweedfs/seaweedfs/releases/tag/4.41 Added Reference https://github.com/seaweedfs/seaweedfs/security/advisories/GHSA-hqp5-j79g-vr89