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CVE-2018-16886
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…
Medium6.8EPSS 4.1%
- Published
- Updated
- Reserved
- Assigned by
- redhat
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| redhatCNA (assigner) | 3.0 | Medium6.8 | CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N |
| NVDNVD · Modified | 3.1 | High8.1 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 4.1% · top 9.3% of all CVEs (6 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.8.
Weakness
Affected products
- affected versions 3.2.x before 3.2.26 and 3.3.x before 3.3.11
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- Gogo.etcd.io/etcdGHSA-h6xx-pmxh-3wgp (opens in a new tab)
- Gogo.etcd.io/etcd/v3GHSA-h6xx-pmxh-3wgp (opens in a new tab)
References (8)
- https://github.com/etcd-io/etcd/blob/1eee465a43720d713bb69f7b7f5e120135fdb1ac/CHANGELOG-3.3.md#security-authentication (opens in a new tab)x_refsource_MISCx_transferred
- 106540 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- https://github.com/etcd-io/etcd/blob/1eee465a43720d713bb69f7b7f5e120135fdb1ac/CHANGELOG-3.2.md#security-authentication (opens in a new tab)x_refsource_MISCx_transferred
- RHSA-2019:0237 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16886 (opens in a new tab)x_refsource_CONFIRMx_transferred
- FEDORA-2019-833466697f (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- FEDORA-2019-219b0b0b6a (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- RHSA-2019:1352 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-h6xx-pmxh-3wgp (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2018-16886)Record last updated .