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Vulnerability record · CVE-2020-15112 · published 5 August 2020

CVE-2020-15112: Etcd improper input validation vulnerability

Etcd · Etcd

In etcd before versions 3.3.23 and 3.4.10, it is possible to have an entry index greater then the number of entries in the ReadAll method in wal/wal.go. This could cause issues when WAL entries are being read during consensus as an arbitrary etcd consensus participant could go down from a runtime panic when reading the entry.

6.5 CVSS 3.1 Medium EPSS 1.3% · top 31.7% CWE-20 · Improper input validationCWE-129 · CWE-129
6.5CVSS 3.1 base score, v2 4.0
1.3%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

In etcd before versions 3.3.23 and 3.4.10, it is possible to have an entry index greater then the number of entries in the ReadAll method in wal/wal.go. This could cause issues when WAL entries are being read during consensus as an arbitrary etcd consensus participant could go down from a runtime panic when reading the entry.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/etcd-io/etcd/security/advisories/GHSA-m332-53r6-2w93 Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L6B6R43Y7M3DCHWK3L3UVGE
https://github.com/etcd-io/etcd/security/advisories/GHSA-m332-53r6-2w93 Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L6B6R43Y7M3DCHWK3L3UVGE

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Source: NIST National Vulnerability Database (record CVE-2020-15112), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.