CVE-2026-55998
Last modified
CVE-2026-55998 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. The endpoint /v3/import/{token}_{clusterId}.yaml retrieves the cluster object before validating the token. When a valid cluster ID references a cluster that has private registry secrets configured, a nil pointer dereference in pkg/systemtemplate/private_registry.go causes the request to return HTTP 502 Bad Gateway.
Description
The endpoint /v3/import/{token}_{clusterId}.yaml retrieves the cluster object before validating the token. When a valid cluster ID references a cluster that has private registry secrets configured, a nil pointer dereference in pkg/systemtemplate/private_registry.go causes the request to return HTTP 502 Bad Gateway. For cluster IDs that do not exist, the endpoint returns HTTP 200. This observable difference in response codes constitutes a reliable enumeration oracle.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Weakness Enumeration
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| SUSE | Rancher | >= 2.14.0, < 2.14.4; >= 2.13.0, < 2.13.8; >= 2.12.0, < 2.12.12; >= 2.11.0, < 2.11.16 |
References
Timeline
- Published
- Last Modified
- Status
- Received
Frequently Asked Questions
What is CVE-2026-55998?
How severe is CVE-2026-55998?
How do I fix CVE-2026-55998?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-55991In NLnet Labs Unbound 1.22.0 up to and including 1.25.1, a r…5.9
- CVE-2026-55993Improper Input Validation, Exposure of Sensitive Information…7.5
- CVE-2026-55994Improper Input Validation, Exposure of Sensitive Information…7.5
- CVE-2026-55995A Double Free vulnerability in open-iscsi allows an unauthen…8.7
- CVE-2026-55996A denial-of-service vulnerability was identified in multiple…4.3
- CVE-2026-55997Rancher issues long-lived registration tokens to authenticat…8.8
- CVE-2026-55999Local attackers with a X connection able to provide PCX font…7.8
- CVE-2026-5600A new API endpoint introduced in pretix 2025 that is suppose…4.3
- CVE-2026-56000Local attackers with a X connection able to provide GLX comm…7.8
- CVE-2026-56001A heap buffer overflow in BitmapScaleBitmaps in libXfont2 be…8.8
- CVE-2026-56002A heap bufferflow in pcfReadFont() due to missing glyph boun…8.8
- CVE-2026-56003A heap buffer overflow due to missing size checking in the p…8.8
Are you affected by CVE-2026-55998?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST