CVE-2018-8012

Status: ModifiedHigh (7.5)—
No authentication/authorization is enforced when a server attempts to join a quorum in Apache ZooKeeper before 3.4.10, and 3.5.0-alpha through 3.5.3-beta. As a result an arbitrary end point could join the cluster and begin propagating counterfeit changes to the leader.
CVSS

Version: 3.1
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Base score: 7.5
Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 8.47%
Percentile among all scored CVEs: 95
Score date: 10/5/2026
EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).
Affected technologies (3)

Apache — Zookeeper Debian — Debian Linux Oracle — Goldengate Stream Analytics
CWEs

CWE-862
References

Raw JSON (NVD)

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{
  "id": "CVE-2018-8012",
  "cveTags": [],
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          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
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  "published": "2018-05-21T19:29:00.250",
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      "description": [
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          "value": "CWE-862"
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    {
      "lang": "en",
      "value": "No authentication/authorization is enforced when a server attempts to join a quorum in Apache ZooKeeper before 3.4.10, and 3.5.0-alpha through 3.5.3-beta. As a result an arbitrary end point could join the cluster and begin propagating counterfeit changes to the leader."
    },
    {
      "lang": "es",
      "value": "No se aplica autenticación/autorización cuando un servidor intenta unirse a un quorum en Apache ZooKeeper en versiones anteriores a la 3.4.10 y 3.5.0-alpha hasta 3.5.3-beta. Como resultado, un endpoint arbitrario podría unirse al clúster y comenzar a propagar cambios falsos al líder."
    }
  ],
  "lastModified": "2026-06-17T02:04:05.120",
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