--- title: "CVE-2018-1002105: Kubernetes vulnerability | CubePath" description: "In all Kubernetes versions prior to v1.10.11, v1.11.5, and v1.12.3, incorrect handling of error responses to proxied upgrade requests…" language: en source: https://cubepath.com/security/cve/CVE-2018-1002105 --- # CVE-2018-1002105: Kubernetes vulnerability | CubePath ## Description In all Kubernetes versions prior to v1.10.11, v1.11.5, and v1.12.3, incorrect handling of error responses to proxied upgrade requests in the kube-apiserver allowed specially crafted requests to establish a connection through the Kubernetes API server to backend servers, then send arbitrary requests over the same connection directly to the backend, authenticated with the Kubernetes API server's TLS credentials used to establish the backend connection. Official description from the CVE record, published by kubernetes. Copyright © 1999-2026 The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CVE license. [View the record on cve.org](https://www.cve.org/CVERecord?id=CVE-2018-1002105) ## Key data ### CVSS 3.0 Critical 9.8 Score published by kubernetes in the CVE record. CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | Metric | Value | What it means | | ---------------------- | --------- | ----------------------------------------------------------------------------------- | | Attack vector | Network | The vulnerable component can be reached over a network, possibly from the Internet. | | Attack complexity | Low | No special conditions are needed. The attack can be repeated at will. | | Privileges required | None | No account or privileges are needed. | | User interaction | None | No action from any user is needed. | | Scope | Unchanged | The impact stays within the vulnerable component. | | Confidentiality impact | High | Serious or total effect on the secrecy of data. | | Integrity impact | High | Serious or total effect on the trustworthiness of data. | | Availability impact | High | Serious or total effect on availability. | CVSS is owned and managed by FIRST.Org, Inc. (FIRST) and is used by permission. Each CVSS score on this site is shown together with its vector string, as published in the CVE record by the source named next to it. Learn more at [first.org/cvss](https://www.first.org/cvss/) . ### EPSS Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days. Score 0.86978 (87.0% probability) Percentile 99.8% Scores of Nov 10, 2026 Model v2026.06.15 ## Affected products Products listed in the CVE record, as the CNA published them. - Kubernetes - affected: v1.0.x - affected: v1.1.x - affected: v1.2.x - affected: v1.3.x - affected: v1.4.x - affected: v1.5.x - affected: v1.6.x - affected: v1.7.x - affected: v1.8.x - affected: v1.9.x - affected: unspecified up to before v1.10.11 - affected: unspecified up to before v1.11.5 - affected: unspecified up to before v1.12.3 ## References Links listed in the CVE record. They lead to other sites, which CubePath does not control. - [groups.google.com/forum](https://groups.google.com/forum/#%21topic/kubernetes-announce/GVllWCg6L88) - [46053](https://www.exploit-db.com/exploits/46053/) (exploit-db.com) exploit - [RHSA-2018:3549](https://access.redhat.com/errata/RHSA-2018:3549) (access.redhat.com) vendor-advisory - [RHSA-2018:3752](https://access.redhat.com/errata/RHSA-2018:3752) (access.redhat.com) vendor-advisory - [46052](https://www.exploit-db.com/exploits/46052/) (exploit-db.com) exploit - [RHSA-2018:3624](https://access.redhat.com/errata/RHSA-2018:3624) (access.redhat.com) vendor-advisory - [coalfire.com/The-Coalfire-Blog/December-2018/Kubernetes-Vul…](https://www.coalfire.com/The-Coalfire-Blog/December-2018/Kubernetes-Vulnerability-What-You-Can-Should-Do) - [github.com/kubernetes/kubernetes/issues/71411](https://github.com/kubernetes/kubernetes/issues/71411) - [RHSA-2018:3742](https://access.redhat.com/errata/RHSA-2018:3742) (access.redhat.com) vendor-advisory - [RHSA-2018:3754](https://access.redhat.com/errata/RHSA-2018:3754) (access.redhat.com) vendor-advisory - [RHSA-2018:3537](https://access.redhat.com/errata/RHSA-2018:3537) (access.redhat.com) vendor-advisory - [github.com/evict/poc\_CVE-2018-1002105](https://github.com/evict/poc%5FCVE-2018-1002105) - [RHSA-2018:3598](https://access.redhat.com/errata/RHSA-2018:3598) (access.redhat.com) vendor-advisory - [RHSA-2018:3551](https://access.redhat.com/errata/RHSA-2018:3551) (access.redhat.com) vendor-advisory - [106068](http://www.securityfocus.com/bid/106068) (securityfocus.com) vdb-entry - [security.netapp.com/advisory/ntap-20190416-0001](https://security.netapp.com/advisory/ntap-20190416-0001/) - [\[oss-security\] 20190628 Re: linux-distros membership application - Microsoft](http://www.openwall.com/lists/oss-security/2019/06/28/2) (openwall.com) mailing-list - [\[oss-security\] 20190706 Re: linux-distros membership application - Microsoft](http://www.openwall.com/lists/oss-security/2019/07/06/3) (openwall.com) mailing-list - [\[oss-security\] 20190706 Re: linux-distros membership application - Microsoft](http://www.openwall.com/lists/oss-security/2019/07/06/4) (openwall.com) mailing-list - [openSUSE-SU-2020:0554](http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00041.html) (lists.opensuse.org) vendor-advisory ## Timeline 1. ID reserved Dec 5, 2018 2. Record published Dec 5, 2018 3. Record last updated Aug 5, 2024 ## Look up another CVE ## About CubePath CubePath is a cloud provider with data centers in Europe and the United States. It offers VPS, bare metal servers and DDoS protection. [Cloud VPS](https://cubepath.com/vps) [DDoS protection](https://cubepath.com/ddos-protection) Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 20:03 UTC. [Sources and licenses](https://cubepath.com/security/cve/legal)