Account takeover via mutable identity fields
Published Sep 3, 2026 · Updated Sep 3, 2026
Improper access control in SUSE Rancher before 2.15.1 allows remote authenticated users with users:update to hijack accounts. The Norman user store Update handler in pkg/auth/api/user/user_store.go accepts changes to username, principalIds, and displayName on existing User resources instead of enforcing immutability. Exploitation requires users.management.cattle.io update permission, a configured external identity provider, and a later login by the injected principal, which inherits the victim account's role bindings.
Summary
What happened
Improper access control in SUSE Rancher before 2.15.1 allows remote authenticated users with users:update to hijack accounts. The Norman user store Update handler in pkg/auth/api/user/user_store.go accepts changes to username, principalIds, and displayName on existing User resources instead of enforcing immutability. Exploitation requires users.management.cattle.io update permission, a configured external identity provider, and a later login by the injected principal, which inherits the victim account's role bindings.
The record
- CVE
- CVE-2026-71403
- Published
- Sep 3, 2026
- Updated
- Sep 3, 2026
- Vendor
- NeuVector
- Product
- Rancher
- Classifications
- CWE-639, CWE-284, T1098
- Attack vector
- network
- Privileges
- admin
Timeline
How it unfolded
- Sep 3, 2026CVE publishedPublication date reported by the CVE source.
- Sep 3, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <2.15.1
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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