Read the docs
TI-2026-63019 Aliases CVE-2026-93539

Unauthenticated GitRepo Spec Mutation via Fleet Git Webhook Receiver

Priority LOW 24CWE-306Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
None · Low · Low
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-306.

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.  This only affects SUSE Rancher Fleet 0.16 before 0.16.2, older versions are not affected.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00233 14th percentileScored 2026-11-07
Fix Fixed Rancher (SUSE): 0.16.2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
SUSERancher0.16.0 to before 0.16.20.16.2Patch availableCNA
  • Rancher VendorSUSE Affected 0.16.0 to before 0.16.2 Fixed in 0.16.2 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:suse:rancher_fleet:*:*:*:*:*:*:*:*0.16.0 to before 0.16.2VulnerableSUSE
  • cpe:2.3:a:suse:rancher_fleet:*:*:*:*:*:*:*:* Versions 0.16.0 to before 0.16.2 Vulnerable ·SUSE

Remediation

  • Fix · CNA Rancher (SUSE) Fixed in 0.16.2

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-93539

References

Advisory 1

  • TI-2026-32801 Rancher Fleet vulnerable to cross namespace secret disclosure via unvalidated `valuesFrom` references in Helm Deployer CVSS 3.1CRITICAL 9.9
  • TI-2026-29689 Helm impersonation bypass of `RESTClientGetter` retains `cluster-admin` during template rendering CVSS 3.1CRITICAL 9.9
  • TI-2026-60216 Fleet agent copies downstream resources with cluster-admin privileges, allowing… CVSS 3.1HIGH 8.8
  • TI-2026-32804 Fleet has PSS Bypass through addLabelsFromOptions in Fleet Agent CVSS 3.1HIGH 8.8
  • TI-2026-32803 SUSE Rancher Fleet had an Unauthenticated Webhook: Regex Injection via Unsanitized Repository URL Components CVSS 4.0HIGH 8.3
  • TI-2026-63018 Authentication bypass by spoofing in SUSE Rancher CVSS 3.1HIGH 7.1
See all 11 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences