EUVD-2026-29915Published

Rancher Extensions have arbitrary file access via path traversal

Collected exploitation and prediction evidence

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.

cve-program · CVE-2026-25705

Published

A vulnerability has been identified in [Rancher's Extensions](https://ranchermanager.docs.rancher.com/integrations-in-rancher/rancher-extensions) where malicious code can be injected in Rancher through a path traversal in the `compressedEndpoint` field inside a `UIPlugin` deployment. A malicious UI extension could abuse that to: * Overwrite Rancher binaries or configuration to inject code. * Write to /var/lib/rancher/ to tamper with cluster state. * If hostPath volumes are mounted, write to the host node filesystem. * Use this issue to chain with other attack vectors.

Source published: 13 May 2026 08:00:46 UTC
Source modified: 14 May 2026 03:55:59 UTC
Observed here: 23 Oct 2026 15:48:27 UTC
Source terms: CVE Program Terms of Use

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CVSS 3.1 · 8.4 CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H

euvd · EUVD-2026-29915

Published

EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON.

Original publisher date fields

datePublished: May 13, 2026, 8:00:46 AM

dateUpdated: May 14, 2026, 3:55:59 AM

Source published: May 13, 2026, 8:00:46 AM (timezone not stated)
Source modified: May 14, 2026, 3:55:59 AM (timezone not stated)
Observed here: 28 Oct 2026 02:10:22 UTC
Source terms: ENISA EUVD · source terms and attribution apply

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EUVD CVSS 3.1 · 8.4 CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H

nvd · CVE-2026-25705

Published

NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON.

Source analysis status: Awaiting Analysis

Weakness classifications: CWE-35

Original publisher date fields

published: 2026-05-13T08:16:16.083

lastModified: 2026-10-26T14:10:00.130

Source published: 13 May 2026 08:16:16 UTC
Source modified: 26 Oct 2026 14:10:00 UTC
Observed here: 27 Oct 2026 07:23:16 UTC
Source terms: NIST NVD usage terms; underlying source attribution retained

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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: nvd · NIST NVD usage terms; underlying source attribution retained. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS 3.1 · [email protected] · Secondary · 8.4 CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H

osv · GHSA-5v3h-x4wf-5c35

Published

### Impact A vulnerability has been identified in [Rancher's Extensions](https://ranchermanager.docs.rancher.com/integrations-in-rancher/rancher-extensions) where malicious code can be injected in Rancher through a path traversal in the `compressedEndpoint` field inside a `UIPlugin` deployment. A malicious UI extension could abuse that to: - Overwrite Rancher binaries or configuration to inject code. - Write to `/var/lib/rancher/` to tamper with cluster state. - If `hostPath` volumes are mounted, write to the host node filesystem. - Use this issue to chain with other attack vectors. By default only the administrator can deploy UI extensions, unless permissions are granted to other users. It's always recommended to only install extensions that come from sources trusted by the user. Please consult the associated [MITRE CAPEC-126 - Technique - Path Traversal](https://capec.mitre.org/data/definitions/126.html) for further information about this category of attack. ### Patches This vulnerability is addressed by ensuring that: - The file defined by the UI Plugin CR's `compressedEndpoint` has to be created inside the cache directory and cannot contain `../`. If that is not possible, the installation will fail and the file won't be created. - The icons referenced by Cluster Repos' `index.yaml` file always resolves to a file inside the repository directory. Patched versions of Rancher include releases v2.14.1, v2.13.5, v2.12.9, v2.11.13. ### Workarounds There is no workaround. The user must be careful about which UI Plugins they install. ### Resources If there are 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 the [support matrix](https://www.suse.com/suse-rancher/support-matrix/all-supported-versions/) and [product support lifecycle](https://www.suse.com/lifecycle/).

Source published: 7 May 2026 01:23:59 UTC
Source modified: 10 Sep 2026 03:51:04 UTC
Observed here: 24 Oct 2026 13:19:41 UTC
Source terms: GitHub Advisory Database · CC-BY-4.0

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

Publisher rating · HIGH

osv · GO-2026-5154

Published

Rancher Extensions have arbitrary file access via path traversal 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 v2.10.11 before v2.11.13, from v2.12.0 before v2.12.9, from v2.13.0 before v2.13.5, from v2.14.0 before v2.14.1.

Source published: 25 Jun 2026 18:26:48 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

Original source record · Cite this exact observation · Complete original publisher JSON

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.