Rancher: Improper Validation of Specified Type of Input
CVE-2026-44935 is a critical-severity improper validation of specified type of input vulnerability in Rancher from SUSE, with a CVSS 3.1 base score of 9.9 out of 10. It can be exploited remotely over the network by an attacker with a low-privileged account, without any action from a user. The record lists versions 0.15.2, 0.14.6, 0.13.11 as the first without the flaw, so updating Rancher to one of those releases or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.49% chance of exploitation within 30 days, which is low compared with other CVEs.
Critical severity: a successful attack would have severe impact.
What to do
- Update Rancher to 0.15.2 or 0.14.6 or 0.13.11 or 0.12.15, whichever matches your release line, or a later version.
- Update Rancher Fleet to 0.12.15 or 0.13.11 or 0.14.6 or 0.15.2, whichever matches your release line, or a later version.
- Read the advisory on github.com for workarounds and exact fixed builds.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| SUSE | Rancher | 0.15.0 up to, but not including, 0.15.2; 0.14.0 up to, but not including, 0.14.6; 0.13.0 up to, but not including, 0.13.11; 0.12.0 up to, but not including, 0.12.15 | 0.15.2, 0.14.6, 0.13.11, 0.12.15 |
| SUSE | Rancher Fleet | 0.12.0 up to, but not including, 0.12.15; 0.13.0 up to, but not including, 0.13.11; 0.14.0 up to, but not including, 0.14.6; 0.15.0 up to, but not including, 0.15.2 | 0.12.15, 0.13.11, 0.14.6, 0.15.2 |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- LowA basic user account is enough.
- User interaction
- NoneNo action by a victim is required.
- Scope
- ChangedThe attack can reach beyond the vulnerable component into other systems.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- HighData or code can be modified at will.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H. Scored by CNA (suse.de).
Official description
Missing validation of "valuesFrom" references in Helm Deployer of SUSE Rancher Fleet 0.15 before 0.15.2, 0.14 before 0.14.6, 0.13 before 0.13.11 and 0.12 before 0.12.15 could be used by owners of one tenant to access fleet credentials of other tenants.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Validation of Specified Type of Input
The product receives input that is expected to be of a certain type, but it does not validate or incorrectly validates that the input is actually of the expected type.
More Improper Validation of Specified Type of Input vulnerabilities (CWE-1287)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Other vulnerabilities in Rancher
- 9.1 Critical severity
- 7.2 High severity
- 9.1 Critical severity
- 7.6 High severity
- 7.9 High severity
- 8.5 High severity
Recent Improper Validation of Specified Type of Input vulnerabilities
- 7.1 High severity
- 8.4 High severity
- 7.3 High severity
- 7.5 High severity
- 7.7 High severity
- 8.6 High severity
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