Authentication vulnerability found in Etcd-io v.3.4.10 allows remote attackers to…
Priority MEDIUM 52CWE-287Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Partial Red Hat: 3 fixed, 4 without a fix
Attack profile from CVSS 3.1 · NVD. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-287.
Summary
Authentication vulnerability found in Etcd-io v.3.4.10 allows remote attackers to escalate privileges via the debug function.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01618 76th percentileScored 2026-11-07
Fix Partial Red Hat: 3 advisoriesRed Hat: 3 fixed, 4 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
| — | go.etcd.io/etcd/v3 (Go) | — | — | No fix listed | GHSA-gmph-wf7j-9gcm |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
- go.etcd.io/etcd/v3 (Go) Vendor— Affected — Fixed in — No fix listed GHSA-gmph-wf7j-9gcm
Remediation
Red Hat 3 advisories
- RHSA-2023:3441 Released 2023-06-05 · Red Hat rating ImportantRed Hat OpenStack Platform 17.0 (etcd) security update
- Red Hat OpenStack Platform 17.0 etcd-3.4.26-1.el9ost
- RHSA-2023:3445 Released 2023-06-05 · Red Hat rating ImportantRed Hat OpenStack Platform 16.2 (etcd) security update
- Red Hat OpenStack Platform 16.2 etcd-3.3.23-14.el8ost
- RHSA-2023:3447 Released 2023-06-05 · Red Hat rating ImportantRed Hat OpenStack Platform 16.1 (etcd) security update
- Red Hat OpenStack Platform 16.1 etcd-3.3.23-14.el8ost
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Logging Subsystem for Red Hat OpenShift | Affected | No fix yet |
| Red Hat Enterprise Linux 7 | Affected | No fix planned: Will not fix |
| Red Hat OpenShift Container Platform 4 | Affected | No fix yet |
| Red Hat Storage 3 | Affected | No fix yet |
| Red Hat OpenStack Platform 16.1 | Fixed | RHSA-2023:3447 |
| Red Hat OpenStack Platform 16.2 | Fixed | RHSA-2023:3445 |
| Red Hat OpenStack Platform 17.0 | Fixed | RHSA-2023:3441 |
Not affected: 1 product
- OpenShift Serverless
Timeline
- 2026-10-02 Threatist record created from CVE-2021-28235
- 2026-10-03 Alias added: GHSA-gmph-wf7j-9gcm
References
More etcd-io Etcd vulnerabilities
- TI-2026-25810 etcd: Authorization bypasses in multiple APIs CVSS 4.0HIGH 8.8
- TI-2022-15016 Etcd v3.5.4 allows remote attackers to cause a denial of service via function… CVSS 3.1HIGH 7.5
- TI-2018-12096 Improper authentication in etcd: CVSS 3.1HIGH 8.1
- TI-2026-42635 etcd: gRPC client listener does not enforce `--client-crl-file` certificate revocation CVSS 3.1HIGH 8.1
- TI-2026-25749 etcd: Nested etcd transactions bypass RBAC authorization checks CVSS 3.1MEDIUM 6.5
- TI-2020-11888 Improper Preservation of Permissions in etcd CVSS 3.1HIGH 7.1
Sources
- CVE-2021-28235 · CVE Program
- CVE-2021-28235 · NVD
- FIRST EPSS
- GHSA-gmph-wf7j-9gcm · GitHub Advisory Database · CC BY 4.0
- CVE-2021-28235 · Red Hat security data · CC BY 4.0
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