Description
Authentication vulnerability found in Etcd-io v.3.4.10 allows remote attackers to escalate privileges via the debug function.
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 | 3.4.30-1 | — |
| Debian 13 | etcd | 3.4.30-1 | — |
| Debian 12 | etcd | No fix yet | — |
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 | 3.3.25+dfsg-7ubuntu0.22.04.1+esm1 | USN-6189-1 |
| Ubuntu Pro 20.04 LTS | etcd | 3.2.26+dfsg-6ubuntu0.2+esm1 | USN-6189-1 |
| Ubuntu Pro 18.04 LTS | etcd | 3.2.17+dfsg-1ubuntu0.1+esm2 | USN-6189-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat OpenStack 17 | etcd | 3.4.26-1.el9ost | RHSA-2023:3441 |
| Red Hat OpenStack 16 | etcd | 3.3.23-14.el8ost | RHSA-2023:3447, RHSA-2023:3445 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SUSE Package Hub 15 SP6 | etcd | 3.5.12-bp156.4.3.1 | openSUSE-SU-2025:0003-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | etcd | 3.5.8-1.1 | openSUSE-SU-2024:12896-1 |
| openSUSE Tumbleweed | etcd-for-k8s1.25 +2 | 3.5.9-1.1 | openSUSE-SU-2024:13371-1, openSUSE-SU-2024:13370-1, openSUSE-SU-2024:13369-1 |
| openSUSE Leap 15.6 | etcd | 3.5.12-bp156.4.3.1 | openSUSE-SU-2025:0003-1, SUSE-SU-2024:3656-1 |
| openSUSE Leap 15.5 | etcd | 3.5.12-150000.7.6.1 | SUSE-SU-2024:3656-1 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 2 (CBL-Mariner) | etcd | 3.5.4-6 | — |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
GitHub 1 repository
-
h3ck13r/CVE-2021-28235 ★ 0 · Jul 10, 2026
CVE-2021-28235 PoC
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Go | go.etcd.io/etcd/v3 | 3.4.10 | — | GHSA-gmph-wf7j-9gcm |
Advisories 11
- RHSA-2023:3447 Red Hat Security Advisory: Red Hat OpenStack Platform 16.1 (etcd) security update Red Hat Security Advisories (RHSA) · Oct 20, 2026
- RHSA-2023:3445 Red Hat Security Advisory: Red Hat OpenStack Platform 16.2 (etcd) security update Red Hat Security Advisories (RHSA) · Oct 20, 2026
- RHSA-2023:3441 Red Hat Security Advisory: Red Hat OpenStack Platform 17.0 (etcd) security update Red Hat Security Advisories (RHSA) · Aug 20, 2026
- USN-6189-1 etcd vulnerability Ubuntu Security Notices (USN) · Apr 27, 2026
- openSUSE-SU-2025:0003-1 Security update for etcd SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:13369-1 etcd-for-k8s1.25-3.5.9-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:3656-1 Security update for etcd SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:13370-1 etcd-for-k8s1.26-3.5.9-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:12896-1 etcd-3.5.8-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:13371-1 etcd-for-k8s1.27-3.5.9-1.1 on GA media SUSE / openSUSE Security Updates · May 7, 2025
- WID-SEC-2023-1373 Red Hat OpenStack Platform : Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 30, 2023