vulntracker.iovulntracker.io
© 2026 vulntracker.io

CVE-2018-16886

HIGH
8.1
CVSS Score
Published: January 14, 2019 at 07:00 PM UTC
Updated: June 17, 2026 at 01:44 AM UTC
5 products affected across 3 vendorsFedoraEnterprise Linux DesktopEnterprise Linux Server

Using etcd: by The etcd Project?

Get instant alerts when new vulnerabilities affect etcd: - before attackers find them.

Real-time alertsTrack your software stackFree plan available
Start FreeSign In
Severity
HIGH8.1
Exploit prediction
EPSS 4%

Description

etcd versions 3.2.x before 3.2.26 and 3.3.x before 3.3.11 are vulnerable to an improper authentication issue when role-based access control (RBAC) is used and client-cert-auth is enabled. If an etcd client server TLS certificate contains a Common Name (CN) which matches a valid RBAC username, a remote attacker may authenticate as that user with any valid (trusted) client certificate in a REST API request to the gRPC-gateway.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Etcd:· Etcd
95%
v < 3.2.263.2.0 ≤ v < 3.2.263.3.0 ≤ v < 3.3.11
Affected range stops below 3.2.26, so it looks safe — our inference, not a vendor statement
Affected range stops below 3.3.11, so it looks safe — our inference, not a vendor statement
Fedora· Fedora Projectrpm
95%
30
Enterprise Linux Desktop· Red Hatrubygems
95%
7.0
Enterprise Linux Server· Red Hatrubygems
95%
7.0
Enterprise Linux Workstation· Red Hatrubygems
95%
7.0

References (8)

VDB Entryx_refsource_BIDThird Party Advisory
Source: [email protected]
http://www.securityfocus.com/bid/106540
Vendor Advisoryx_refsource_REDHATThird Party Advisory
Source: [email protected]
https://access.redhat.com/errata/RHSA-2019:0237
Vendor Advisoryx_refsource_REDHATThird Party Advisory
Source: [email protected]
https://access.redhat.com/errata/RHSA-2019:1352
x_refsource_CONFIRMIssue TrackingPatchThird Party Advisory
Source: [email protected]
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16886
x_refsource_MISCRelease Notes
Source: [email protected]
https://github.com/etcd-io/etcd/blob/1eee465a43720d713bb69f7b7f5e120135fdb1ac/CHANGELOG-3.2.md#security-authentication
x_refsource_MISCRelease Notes
Source: [email protected]
https://github.com/etcd-io/etcd/blob/1eee465a43720d713bb69f7b7f5e120135fdb1ac/CHANGELOG-3.3.md#security-authentication
Vendor Advisoryx_refsource_FEDORA
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JX7QTIT465BQGRGNCE74RATRQLKT2QE4/
Vendor Advisoryx_refsource_FEDORA
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UPGYHMSKDPW5GAMI7BEP3XQRVRLLBJKS/

CVSS

8.1HIGH[email protected]
Attack Vector
NETWORK
Complexity
HIGH
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-287

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Create accountSign in
Free plan, no card