Public proof of conceptFix available

CVE-2018-1002105

Q: Is CVE-2018-1002105 actively exploited?

Active exploitation of CVE-2018-1002105 has not been confirmed. Its EPSS score was 87.0% on 2026-11-04, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2018-1002105?

CVE-2018-1002105 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

A public proof of concept exists; no exploitation attested.

Published2018-12-05
Fixed in1.12.3 · 1.11.5 · 1.10.11
WeaknessCWE-388

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC

2018-12-0521:29CVE publishedNVD
2018-12-10Exploit-DB entryExploit-DB

Versions per branch

OSV · NVD

kubernetes/kubernetes

Branch	Affected	Fixed in	Source
1.12	≥ 1.12.0, < 1.12.3	1.12.3	OSV
1.11	≥ 1.11.0, < 1.11.5	1.11.5	OSV
1.10	< 1.10.11	1.10.11	OSV

Redhat openshift container platform

Branch	Affected	Fixed in	Source
3.2	= 3.2	no fix published	NVD
3.3	= 3.3	no fix published	NVD
3.4	= 3.4	no fix published	NVD
3.5	= 3.5	no fix published	NVD
3.6	= 3.6	no fix published	NVD
3.8	= 3.8	no fix published	NVD
3.10	= 3.10	no fix published	NVD
3.11	= 3.11	no fix published	NVD

Kubernetes

Branch	Affected	Fixed in	Source
1.x	≥ 1.0.0, ≤ 1.9.11	no fix published	NVD
1.10	≥ 1.10.0, ≤ 1.10.10	no fix published	NVD
1.11	≥ 1.11.0, ≤ 1.11.4	no fix published	NVD
1.12	≥ 1.12.0, ≤ 1.12.2	no fix published	NVD
1.9	= 1.9.12	no fix published	NVD

1 more product in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

atomic-enterprise-service-catalogRed Hat:openshift:3.10::el7all versions · fixed in 1:3.10.72-1.git.1450.7d3f435.el7and 1 other package
atomic-openshiftRed Hat:openshift:3.11::el7all versions · fixed in 0:3.11.43-1.git.0.647ac05.el7and 11 other packages
atomic-openshiftRed Hat:openshift:3.10::el7all versions · fixed in 0:3.10.72-1.git.0.3cb2fdc.el7and 12 other packages
atomic-openshiftRed Hat:openshift:3.9::el7all versions · fixed in 0:3.9.51-1.git.0.dc3a40b.el7and 13 other packages
atomic-openshiftRed Hat:openshift:3.8::el7all versions · fixed in 0:3.8.44-1.git.0.9be0abd.el7and 14 other packages
atomic-openshiftRed Hat:openshift:3.7::el7all versions · fixed in 0:3.7.72-1.git.0.925b9cd.el7and 15 other packages
atomic-openshiftRed Hat:openshift:3.6::el7all versions · fixed in 0:3.6.173.0.140-1.git.0.9686d52.el7and 14 other packages
atomic-openshiftRed Hat:openshift:3.5::el7all versions · fixed in 0:3.5.5.31.80-1.git.0.c4a0780.el7and 11 other packages

29 more package ranges on OSV.dev

Vendor advisories

CVE-2018-1002105 Red Hat Product Security236 products fixed · 7 known affected
kubernetes: authentication/authorization bypass in the handling of non-101 responses
openshift as a component of Red Hat OpenShift Enterprise 3.0 · openshift-clients as a component of Red Hat OpenShift Enterprise 3.0 · openshift-master as a component of Red Hat OpenShift Enterprise 3.0 · +4 more
RHSA-2018:3624 Red Hat Product Security25 products fixed
Red Hat Security Advisory: OpenShift Container Platform 3.5 security update
RHSA-2018:3598 Red Hat Product Security25 products fixed
Red Hat Security Advisory: OpenShift Container Platform 3.6 security update
RHSA-2018:3752 Red Hat Product Security22 products fixed
Red Hat Security Advisory: OpenShift Container Platform 3.4 security update
RHSA-2018:3754 Red Hat Product Security22 products fixed
Red Hat Security Advisory: OpenShift Container Platform 3.3 security update
RHSA-2018:3742 Red Hat Product Security14 products fixed
Red Hat Security Advisory: OpenShift Container Platform 3.2 security update

5 more advisories

Full record on NVD

Fix

Update kubernetes/kubernetes to 1.12.3 · 1.11.5 · 1.10.11
Vendor fix Red Hat Product Security RHSA-2018:3624 · 25 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
Workaround from the vendor Red Hat Product Security RHSA-2018:3624 · 25 productsSee the vulnerability article for mitigation procedures.

Advisories and patches

github.comMitigation · Patch
www.coalfire.comMitigation

Detection

read 2026-11-01 01:02 UTC

Nuclei template: none so far
Exploit-DB: EDB-46052 EDB-46053
Proof of concept: PoC-in-GitHub5 repositories, unverifiedknown since 2026-11-01gravitational/cve-2018-1002105evict/poc_CVE-2018-1002105imlzw/Kubernetes-1.12.3-all-auto-installbgeesaman/cve-2018-1002105sh-ubh/CVE-2018-1002105
Metasploit modules: none listed

Sources

CNACVSS 3.09.8known since 2026-10-23
NVDCVSS 3.09.8read 2026-10-23
NVDCVSS 2.07.5read 2026-10-23
NVDweakness (CWE)CWE-388read 2026-10-23
FIRST EPSSEPSS score87.0 %read 2026-11-04
PoC-in-GitHubproof of concept5known since 2026-11-01
Exploit-DBdetectionread 2026-11-04
OSVaffected packages—
GitHub AdvisoriesadvisoryCRITICAL2021-05-20

Identifiers

CGA-8576-x69q-j9q5same flawChainguard · CC-BY-NC-ND-4.0
CGA-qfg4-9pmj-wm22same flawChainguard · CC-BY-NC-ND-4.0
EUVD-2022-0831same flawENISA EUVD · LicenseRef-ENISA-legal-notice
GHSA-579h-mv94-g4gpsame flawGitHub Advisory Database · CC-BY-4.0
GO-2022-0792same flawGo Vulnerability Database · CC-BY-4.0
openSUSE-SU-2020:0554-1advisory covering several CVEsopenSUSE · LicenseRef-unstated
RHSA-2018:2906advisory covering several CVEsRed Hat · CC-BY-4.0
RHSA-2018:2908advisory covering several CVEsRed Hat · CC-BY-4.0
RHSA-2018:3537advisory covering several CVEsRed Hat · CC-BY-4.0
RHSA-2018:3549advisory covering several CVEsRed Hat · CC-BY-4.0
RHSA-2018:3551advisory covering several CVEsRed Hat · CC-BY-4.0
RHSA-2018:3598advisory covering several CVEsRed Hat · CC-BY-4.0
RHSA-2018:3624advisory covering several CVEsRed Hat · CC-BY-4.0
RHSA-2018:3742advisory covering several CVEsRed Hat · CC-BY-4.0
RHSA-2018:3752advisory covering several CVEsRed Hat · CC-BY-4.0
RHSA-2018:3754advisory covering several CVEsRed Hat · CC-BY-4.0

Technical details

CVSS v3 Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: 2018-12-05
Last Modified: 2026-06-17
NVD status: Modified
GitHub Advisory: GHSA-579h-mv94-g4gp

Frequently asked questions

What is CVE-2018-1002105?

Is CVE-2018-1002105 actively exploited?

Active exploitation of CVE-2018-1002105 has not been confirmed. Its EPSS score was 87.0% on 2026-11-04, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2018-1002105?

CVE-2018-1002105 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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