CVE-2026-33413 Details
etcd is a distributed key-value store for the data of a distributed system. Prior to versions 3.4.42, 3.5.28, and 3.6.9, unauthorized users may bypass authentication or authorization checks and call certain etcd functions in clusters that expose the gRPC API to untrusted or partially trusted clients. In unpatched etcd clusters with etcd auth enabled, unauthorized users are able to call MemberList and learn cluster topology, including member IDs and advertised endpoints; call Alarm, which can be abused for operational disruption or denial of service; use Lease APIs, interfering with TTL-based keys and lease ownership; and/or trigger compaction, permanently removing historical revisions and disrupting watch, audit, and recovery workflows. Kubernetes does not rely on etcd’s built-in authentication and authorization. Instead, the API server handles authentication and authorization itself, so typical Kubernetes deployments are not affected. Versions 3.4.42, 3.5.28, and 3.6.9 contain a patch. If upgrading is not immediately possible, reduce exposure by treating the affected RPCs as unauthenticated in practice. Restrict network access to etcd server ports so only trusted components can connect and/or require strong client identity at the transport layer, such as mTLS with tightly scoped client certificate distribution.
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Exploit prediction scoring system (EPSS) score for CVE-2026-33413
EPSS (Exploit Prediction Scoring System): EPSS predicts the likelihood that a vulnerability will be exploited in the wild. A higher percentage means a greater chance of an exploit occurring. The EPSS model produces a probability score between 0 and 1 (0 and 100%).
0.05 Probability of exploitation activity being observed over the next 30 days (15th percentile)
CVSS score for CVE-2026-33413
CVSS (Common Vulnerability Scoring System): An open framework owned and managed by FIRST.Org, Inc. that assigns a numerical score from 0 to 10 to software vulnerabilities to indicate their severity.
8.8 High
Products affected by CVE-2026-33413
Etcd 2.2.5
Etcd 2.3.0
Etcd 2.3.7
Etcd 2.3.8
Etcd 3.0.10
DVE Score by Bitsight AI
DVE scores complement traditional static scoring systems like CVSS with Bitsight AI powered real-time threat intelligence and underground cyber criminal activity so that security teams can reduce alert fatigue and focus on vulnerabilities most likely to be exploited.
Low
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CVE-2026-33413 Global Footprint

Top 10 Identified Countries

Country Observations Percentage
CN 354 36.95%
US 102 10.65%
DE 90 9.39%
HK 77 8.04%
BR 51 5.32%
SG 42 4.38%
RU 38 3.97%
FR 26 2.71%
FI 21 2.19%
VN 20 2.09%

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CVE-2026-33413 Industry Footprint

Top 10 Identified Industries

*Service provider organizations (typically Technology and Telecommunications) are disproportionally represented in the results given their upstream ownership of end-user infrastructure. See our FAQs.

Industry* Observations Percentage
Technology 517 87.04%
Telecommunications 58 9.76%
Retail 12 2.02%
Education 3 0.51%
Media/Entertainment 2 0.34%
Government/Politics 1 0.17%
Consumer Goods 1 0.17%

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