CVE-2026-55997
Long-lived Rancher registration token exposed in plaintext
Description
Rancher issues long-lived registration tokens to authenticate nodes and agents joining a downstream cluster. These tokens were stored and exposed in plaintext with no expiration, so a malicious user could obtain one either through the Rancher API, etcd, stored automation, or direct file access on a node, and could use it at any time to register a rogue node into the cluster.
INFO
Published Date :
Aug. 5, 2026, 8:16 a.m.
Last Modified :
Aug. 5, 2026, 8:16 a.m.
Remotely Exploit :
No
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-55997
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | 404e59f5-483d-4b8a-8e7a-e67604dd8afb | ||||
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 3.1 | HIGH | MITRE-CVE |
Solution
- Rotate or revoke compromised registration tokens immediately.
- Enable token expiration for new tokens.
- Store tokens securely, avoiding plaintext.
- Restrict API access to registration tokens.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-55997.
| URL | Resource |
|---|---|
| https://bugzilla.suse.com/show_bug.cgi?id=CVE-2026-55997 | |
| https://github.com/rancher/rancher/security/advisories/GHSA-7r53-jvhg-9jq4 |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-55997 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-55997
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-55997 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-55997 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by [email protected]
Aug. 05, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'rancher', 'product': 'rancher', 'versions': [{'status': 'affected', 'version': '2.14.0', 'lessThan': '2.14.4', 'versionType': 'semver'}, {'status': 'affected', 'version': '2.13.0', 'lessThan': '2.13.8', 'versionType': 'semver'}], 'packageName': 'github.com/rancher/rancher', 'defaultStatus': 'unaffected'}] Added Description Rancher issues long-lived registration tokens to authenticate nodes and agents joining a downstream cluster. These tokens were stored and exposed in plaintext with no expiration, so a malicious user could obtain one either through the Rancher API, etcd, stored automation, or direct file access on a node, and could use it at any time to register a rogue node into the cluster. Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H Added CWE CWE-312 Added Reference https://bugzilla.suse.com/show_bug.cgi?id=CVE-2026-55997 Added Reference https://github.com/rancher/rancher/security/advisories/GHSA-7r53-jvhg-9jq4