Description
In ectd before versions 3.4.10 and 3.3.23, gateway TLS authentication is only applied to endpoints detected in DNS SRV records. When starting a gateway, TLS authentication will only be attempted on endpoints identified in DNS SRV records for a given domain, which occurs in the discoverEndpoints function. No authentication is performed against endpoints provided in the --endpoints flag. This has been fixed in versions 3.4.10 and 3.3.23 with improved documentation and deprecation of the functionality.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| etcd-io | etcd | >= 3.4.0, < 3.4.10, < 3.3.23 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | etcd | 3.3.25+dfsg-5 | — |
| Debian 13 | etcd | 3.3.25+dfsg-5 | — |
| Debian 12 | etcd | 3.3.25+dfsg-5 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | etcd | No fix yet | — |
| Ubuntu 25.10 | etcd | No fix yet | — |
| Ubuntu 16.04 LTS | etcd | No fix yet | — |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 26.04 LTS | etcd | No fix yet | — |
| Ubuntu Pro 24.04 LTS | etcd | No fix yet | — |
| Ubuntu Pro 22.04 LTS | etcd | No fix yet | — |
| Ubuntu Pro 20.04 LTS | etcd | No fix yet | — |
| Ubuntu Pro 18.04 LTS | etcd | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat OpenStack 16 | etcd | 3.3.23-1.el8ost | RHSA-2021:0916 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 2 (CBL-Mariner) | etcd | 3.5.0-3 | — |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | dgraph | 23.1.0-r6 | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Go | go.etcd.io/etcd | >= 3.4.0-rc.0, < 3.4.10 | 3.4.10 | GHSA-wr2v-9rpq-c35q |
| Go | go.etcd.io/etcd | < 3.3.23 | 3.3.23 | GHSA-wr2v-9rpq-c35q |
Advisories 1
- RHSA-2021:0916 Red Hat Security Advisory: Red Hat OpenStack Platform 16.1.4 (etcd) security update Red Hat Security Advisories (RHSA) · Jun 27, 2026