CVE catalog
CVE-2018-16886
etcd: CVE-2018-16886
- Severity
- Medium · CVSS 6.8
CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 4.03% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | etcd | sid | 3.5.30-2 | fixed |
| Debian | etcd | forky | 3.5.30-2 | fixed |
| Debian | etcd | trixie | 3.5.16-4 | fixed |
| Debian | etcd | bookworm | 3.4.23-4 | fixed |
| Ubuntu | etcd | pro | 3.1.0-1 | vulnerable |
| Ubuntu | etcd | pro | 3.2.9+dfsg-2 | vulnerable |
| Ubuntu | etcd | pro | 3.2.9+dfsg-3 | vulnerable |
| Ubuntu | etcd | pro | 3.2.17+dfsg-1 | vulnerable |
| Ubuntu | etcd | pro | 3.2.17+dfsg-1ubuntu0.1~esm1 | vulnerable |
| Ubuntu | etcd | pro | 3.2.17+dfsg-1ubuntu0.1 | vulnerable |
| Ubuntu | etcd | pro | 3.2.17+dfsg-1ubuntu0.1+esm1 | vulnerable |
| Ubuntu | etcd | pro | 3.2.17+dfsg-1ubuntu0.1+esm2 | vulnerable |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | etcd | source | sid | 3.2.26+dfsg-1 | not yet assigned | Not reported | [923008] |
| Debian | etcd | source | forky | 3.2.26+dfsg-1 | not yet assigned | Not reported | [923008] |
| Debian | etcd | source | trixie | 3.2.26+dfsg-1 | not yet assigned | Not reported | [923008] |
| Debian | etcd | source | bookworm | 3.2.26+dfsg-1 | not yet assigned | Not reported | [923008] |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [etcd-client]Fixed
Source package: [etcd]
Details (2)
3.4.23-4+b4· amd64 · bookwormFixed · Fixed:
3.2.26+dfsg-1dsa · etcd · debian · bookworm; dsa · etcd · debian · 12
3.4.23-4+b4· arm64 · bookwormFixed · Fixed:
3.2.26+dfsg-1dsa · etcd · debian · bookworm; dsa · etcd · debian · 12
- [etcd-server]Fixed
Source package: [etcd]
Details (2)
3.4.23-4+b4· amd64 · bookwormFixed · Fixed:
3.2.26+dfsg-1dsa · etcd · debian · bookworm; dsa · etcd · debian · 12
3.4.23-4+b4· arm64 · bookwormFixed · Fixed:
3.2.26+dfsg-1dsa · etcd · debian · bookworm; dsa · etcd · debian · 12
- [golang-etcd-server-dev]Fixed
Source package: [etcd]
Details (2)
3.4.23-4· all · bookwormFixed · Fixed:
3.2.26+dfsg-1dsa · etcd · debian · bookworm; dsa · etcd · debian · 12
3.4.23-4· all · bookwormFixed · Fixed:
3.2.26+dfsg-1dsa · etcd · debian · bookworm; dsa · etcd · debian · 12
[Debian 13 (Trixie)]
- [etcd-client]Fixed
Source package: [etcd]
Details (2)
3.5.16-4· amd64 · trixieFixed · Fixed:
3.2.26+dfsg-1dsa · etcd · debian · 13
3.5.16-4· arm64 · trixieFixed · Fixed:
3.2.26+dfsg-1dsa · etcd · debian · 13
- [etcd-server]Fixed
Source package: [etcd]
Details (2)
3.5.16-4· amd64 · trixieFixed · Fixed:
3.2.26+dfsg-1dsa · etcd · debian · 13
3.5.16-4· arm64 · trixieFixed · Fixed:
3.2.26+dfsg-1dsa · etcd · debian · 13
- [golang-etcd-server-dev]Fixed
Source package: [etcd]
Details (2)
3.5.16-4· all · trixieFixed · Fixed:
3.2.26+dfsg-1dsa · etcd · debian · 13
3.5.16-4· all · trixieFixed · Fixed:
3.2.26+dfsg-1dsa · etcd · debian · 13
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/suse-su-2024_3656-1.json]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2018-16886]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2018-16886]
- [https://security-tracker.debian.org/tracker/CVE-2018-16886]
- [https://security.access.redhat.com/data/csaf/v2/vex/2018/cve-2018-16886.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2022/wid-sec-w-2022-0510.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]