CVE-2026-93539Suse Rancher Fleet Missing Authentication for Critical Function
NVDCVSS scored by meissner@suse.de
Vulnerability Summary
A vulnerability was discovered in Fleet's Git webhook receiver (the gitjob webhook service). When a webhook secret is not configured, incoming webhook requests are accepted without verification, and processing a request can change the spec.pollingInterval field of a matching GitRepo resource in any namespace. A caller with network access to the webhook service and no Kubernetes credentials can therefore alter GitRepo configuration outside
the namespaces they are authorized for.Β This only affects SUSE Rancher Fleet 0.16 before 0.16.2, older versions are not affected.
the namespaces they are authorized for.Β This only affects SUSE Rancher Fleet 0.16 before 0.16.2, older versions are not affected.
CVSS v3.1 Base Metrics — Score 5.4 (MEDIUM)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:LAttack VectorNetwork
Attack ComplexityLow
Privileges RequiredLow
User InteractionNone
ScopeUnchanged
ConfidentialityNone
IntegrityLow
AvailabilityLow
Affected & Patched Versions
- Suse Rancher Fleet >= 0.16.0 and < 0.16.2
- Suse Rancher Fleet 0.16.2
What to do
Fix it during your normal patch cycle. No exploitation is confirmed yet.
- Check whether you run Suse Rancher Fleet and which version.
- Update to a patched version listed above, then confirm the new version.
Timeline
- Sep 28, 2026Published
- Oct 7, 2026Record last modified
Score, severity and exploitation changes are tracked from the day Watchtower started logging them.
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External References
Data last checked: Nov 14, 2026 13:06 UTC