Description
DNS rebinding vulnerability found in etcd 3.3.1 and earlier. An attacker can control his DNS records to direct to localhost, and trick the browser into sending requests to localhost (or any other address).
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Red Hat | etcd | 3.3.1 and earlier | — |
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 | 3.4.23-1 | — |
| Debian 13 | etcd | 3.4.23-1 | — |
| Debian 12 | etcd | 3.4.23-1 | — |
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 | — |
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 | 3.4.0 | GHSA-wf43-55jj-vwq8 |
Advisories 1
- WID-SEC-2022-0510 IBM DB2: Mehrere Schwachstellen BSI CERT-Bund (WID) · May 18, 2026
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1552717
- https://github.com/coreos/etcd/issues/9353
- FEDORA-2019-833466697f vendor-advisory
- FEDORA-2019-219b0b0b6a vendor-advisory