Rancher sends sensitive information to external services through the `/meta/proxy` endpoint

CISA KEV is observed exploitation evidence. FIRST EPSS is a dated prediction of exploitation in the next 30 days. Missing scores are unknown. This collector requests predictions only for explicit CVE aliases in the public NuGet archive; Microsoft release views retain their existing prediction scope.

No collected risk observation for these identifiers. This does not establish absence of exploitation or a zero probability.

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.

Source published

2 Oct 2025 10:00:18 UTC

Source modified

2 Oct 2025 14:10:23 UTC

Observed here

23 Oct 2026 15:48:27 UTC

Source terms

CVE Program Terms of Use

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CVSS 3.1 · 4.7 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N

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.

Source published

Oct 2, 2025, 10:00:18 AM (timezone not stated)

Source modified

Oct 2, 2025, 2:10:23 PM (timezone not stated)

Observed here

9 Nov 2026 03:10:15 UTC

Source terms

ENISA EUVD · source terms and attribution apply

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EUVD CVSS 3.1 · 4.7 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N

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.

Source published

2 Oct 2025 10:15:39 UTC

Source modified

12 Oct 2026 15:10:00 UTC

Observed here

25 Oct 2026 02:25:06 UTC

Source terms

NIST NVD usage terms; underlying source attribution retained

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CVSS 3.1 · [email protected] · Secondary · 4.7 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N

### Impact 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. If the authentication provider is configured to have email or other sensitive and/or identifiable information as part of the username and principal ID then when a new cloud credential is being created in Rancher Manager this information is sent to an external entity such as `amazonaws.com`, in case of an AWS cloud credentials, in `Impersonate-Extra-Username` and/or `Impersonate-Extra-Principalid` headers. Please note that neither password, password hashes or Rancher’s related authentication tokens are leaked in those requests. The entities to which such information is sent to are limited by the whitelisted domains specified in `nodedrivers.management.cattle.io` objects. For example, the Amazon EC2 node driver contains the following whitelisted domains: - `iam.amazonaws.com` - `iam.us-gov.amazonaws.com` - `iam.%.amazonaws.com.cn` - `iam.global.api.aws` - `ec2.%.amazonaws.com` - `ec2.%.amazonaws.com.cn` - `ec2.%.api.aws` - `eks.%.amazonaws.com` - `eks.%.amazonaws.com.cn` - `eks.%.api.aws` - `kms.%.amazonaws.com` - `kms.%.amazonaws.com.cn` - `kms.%.api.aws` While the DigitalOcean driver contains the following whitelisted domain: - `api.digitalocean.com` ### Patches This vulnerability is addressed by filtering all `Impersonate-*` headers from the original request by the `/meta/proxy` endpoint. Patched versions of Rancher include releases v2.12.2, v2.11.6, v2.10.10, and v2.9.12. ### Workarounds There are no known workarounds for this issue. ### References If you have any questions or comments about this advisory: - Reach out to the [SUSE Rancher Security team](https://github.com/rancher/rancher/security/policy) for security related inquiries. - Open an issue in the [Rancher](https://github.com/rancher/rancher/issues/new/choose) repository. - Verify with our [support matrix](https://www.suse.com/suse-rancher/support-matrix/all-supported-versions/) and [product support lifecycle](https://www.suse.com/lifecycle/).

Source published

26 Sep 2025 13:02:38 UTC

Source modified

10 Sep 2026 03:50:28 UTC

Observed here

24 Oct 2026 13:19:41 UTC

Source terms

GitHub Advisory Database · CC-BY-4.0

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This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: osv · GitHub Advisory Database · CC-BY-4.0. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS_V3 · CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N

Publisher rating · MODERATE

Rancher sends sensitive information to external services through the `/meta/proxy` endpoint in github.com/rancher/rancher. NOTE: The source advisory for this report contains additional versions that could not be automatically mapped to standard Go module versions. (If this is causing false-positive reports from vulnerability scanners, please suggest an edit to the report.) The additional affected modules and versions are: github.com/rancher/rancher from v2.9.0 before v2.9.12, from v2.10.0 before v2.10.10, from v2.11.0 before v2.11.6, from v2.12.0 before v2.12.2.

Source published

23 Oct 2025 16:25:09 UTC

Source modified

2 Jul 2026 16:59:29 UTC

Observed here

24 Oct 2026 13:19:41 UTC

Source terms

OSV · upstream source license applies

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This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: osv · OSV · upstream source license applies. Source text is retained; field grouping and change labels are provided by ChangeIntel.