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CVE-2025-37731 Elasticsearch

Affected softwareElasticsearch
Severity7.4 High CVSS 3.1 2 scores
Fixed in8.19.8, 9.1.8, 9.2.2
WeaknessImproper authentication (CWE-287)
Published15 Dec 2025
Updated7 Oct 2026

Description

Improper Authentication in Elasticsearch PKI realm can lead to user impersonation via specially crafted client certificates. A malicious actor would need to have such a crafted client certificate signed by a legitimate, trusted Certificate Authority.

CWE-295

Exploitation status

No public exploit

No exploit has been reported in the sources we check.

  • CISA KEV not listed
  • VulnCheck KEV not listed
  • CISA Vulnrichment exploitation: none
  • Indexed PoC none indexed
  • EPSS 0.19% chance in 30 days

Waratek protection

No exploit published

Within Waratek scope. In the sources we check, nobody has published exploit code for this CVE or reported it being exploited.

A public code fix exists: elastic/elasticsearch cd97b85.

  • Protection none
  • Action unverified
  • Review automated Upstream data
  • Record active
Decided by Exploit code for this candidate, published in a reviewed catalogue or a GitHub repository with 5 or more stars, or in use per CISA or VulnCheck; not only a CISA verdict, a forecast, or nothing at all
Finding This CVE is not listed in CISA KEV or VulnCheck KEV, CISA Vulnrichment records no active exploitation, no reviewed exploit catalogue carries an entry for it, and no GitHub PoC repository for it has 5 or more stars. Nobody has published exploit code worth tracing, so it is not a candidate for a rule ahead of the ones where somebody has; an upstream fix path does exist, so the remediation half of the candidacy still holds. This is a statement about what has been published, not about whether the defect is reachable or serious.

CVSS

7.4 HIGH v3.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N 2 metrics

We show the highest score from the newest CVSS version. Scores from different versions can't be compared, and the first score listed is sometimes a 0.0 placeholder.

VersionScoreBandVectorAssignerType
CVSS 3.1 7.4 HIGH CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N NVD Primary published
CVSS 3.1 6.8 MEDIUM CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N security@elastic.co Secondary

Affected software and releases

Oracle advisories

AdvisoryTypeQuarterProducts Oracle names in its risk matrix
Oracle Critical Patch Update July 2026 ↗ CPU 2026-Q3 Oracle Communications / Core (assertj) (6.1.1-7.0.0)

Oracle components and versions

FamilyComponentVersions, as Oracle lists themRead as
Oracle Communications Core (assertj) 6.1.1-7.0.0

Maven packages

Affected and fixed versions, from OSV.dev
PackageIntroducedFixedLast affected
org.elasticsearch.plugin:x-pack-security 7.0.0-alpha1 8.19.8 unbounded
org.elasticsearch.plugin:x-pack-security 9.0.0-beta1 9.1.8 unbounded
org.elasticsearch.plugin:x-pack-security 9.2.0 9.2.2 unbounded
org.elasticsearch.plugin:x-pack-core 7.0.0-alpha1 8.19.8 unbounded
org.elasticsearch.plugin:x-pack-core 9.0.0-beta1 9.1.8 unbounded
org.elasticsearch.plugin:x-pack-core 9.2.0 9.2.2 unbounded

Products and versions

3 products, 10 version entries
SourceVendorProductSchemeAffected versions
nvd elastic elasticsearch generic ≥ 7.0.0 and ≤ 7.17.29 · ≥ 8.0.0 and < 8.19.8 · ≥ 9.0.0 and < 9.1.8 · ≥ 9.2.0 and < 9.2.2
osv org.elasticsearch.plugin x-pack-core generic ≥ 7.0.0 and < 8.19.8 · ≥ 9.0.0 and < 9.1.8 · ≥ 9.2.0 and < 9.2.2
osv org.elasticsearch.plugin x-pack-security generic ≥ 7.0.0 and < 8.19.8 · ≥ 9.0.0 and < 9.1.8 · ≥ 9.2.0 and < 9.2.2

References

URLTags
https://github.com/elastic/elasticsearch/commit/cd97b8566bf56e628070021300784cb9cee0286f WEB
https://github.com/elastic/elasticsearch/commit/d8a408da79f214395845d99d241e832077045983 WEB
https://github.com/elastic/elasticsearch/commit/e519fe4c51a3c887675eb7daea2f914738847f23 WEB
https://discuss.elastic.co/t/elasticsearch-8-19-8-9-1-8-and-9-2-2-security-update-esa-2025-27/384063 WEB
https://github.com/elastic/elasticsearch PACKAGE

Timeline

Published2025-12-15By the CVE Program.
NVD record modified2026-10-07NVD's own last-modified date for this record.