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rancher vulnerability

A vulnerability has been identified within Rancher Manager whereby `Impersonate-Extra-*` headers are being sent to an external entity, for example `amazonaws.com`, via the `/meta/proxy` Rancher endpoint. These headers may contain identifiable and/or sensitive information e.g. email addresses.

Published 2 Oct 2025Updated 12 Oct 20262 sources
CVSS 4.7
Overview Sources History

What happened

A vulnerability has been identified within Rancher Manager whereby `Impersonate-Extra-*` headers are being sent to an external entity, for example `amazonaws.com`, via the `/meta/proxy` Rancher endpoint. These headers may contain identifiable and/or sensitive information e.g. email addresses.

Affected versions

rancher: 2.12.0 through before 2.12.2 (semver); 2.11.0 through before 2.11.6 (semver); 2.10.0 through before 2.10.10 (semver); 2.9.0 through before 2.9.12 (semver) Fixed: See vendor advisory.

Why it matters

Review the vendor advisory and exposure of the affected product to determine operational impact.

Detection & mitigation

  • Apply vendor-provided updates or mitigations.
  • Review affected product exposure and access logs.

Public PoC references

No public PoC reference has passed the current publication threshold.

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