Missing helmRepoURLRegex filter on SUSE Rancher Fleet 0.15 leaks BasicAuth
CVE-2026-44936 Published on July 6, 2026
Rancher Fleet SSRF in Bundle Reader via Unvalidated Helm Repository URL in fleet.yaml
Missing filtering when the helmRepoURLRegex field isn't set on a GitRepo resource in SUSE Rancher Fleet's bundle reader in 0.15 before 0.15.2, 0.14 before 0.14.6, 0.13 before 0.13.11 and 0.12 before 0.12.15 forwards Helm authentication credentials (BasicAuth) to any URL specified in the helm.repo field of a fleet.yaml file, allowing attackers able to push to fleet monitored git repos to leak helm access credentials.
Vulnerability Analysis
CVE-2026-44936 is exploitable with network access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have a small impact on confidentiality, a small impact on integrity and availability.
Weakness Type
What is a SSRF Vulnerability?
The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. By providing URLs to unexpected hosts or ports, attackers can make it appear that the server is sending the request, possibly bypassing access controls such as firewalls that prevent the attackers from accessing the URLs directly. The server can be used as a proxy to conduct port scanning of hosts in internal networks, use other URLs such as that can access documents on the system (using file://), or use other protocols such as gopher:// or tftp://, which may provide greater control over the contents of requests.
CVE-2026-44936 has been classified to as a SSRF vulnerability or weakness.
Products Associated with CVE-2026-44936
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Affected Versions
SUSE Rancher:- Version 0.15.0 and below 0.15.2 is affected.
- Version 0.14.0 and below 0.14.6 is affected.
- Version 0.13.0 and below 0.13.11 is affected.
- Version 0.12.0 and below 0.12.15 is affected.