Vulnerability-Lookup

GHSA-C96X-RPM4-349P

Vulnerability from github – Published: 2026-04-27 21:31 – Updated: 2026-05-06 18:38

Summary

Spring Boot's Elasticsearch auto-configuration doesn't perform hostname verification when connecting to the Elasticsearch server.

Details

When configured to use an SSL bundle, Spring Boot's Elasticsearch auto-configuration does not perform hostname verification when connecting to the Elasticsearch server.

Affected: Spring Boot 4.0.0–4.0.5; upgrade to 4.0.6 or later per vendor advisory.

Severity

5.0 (Medium)


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

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JSON

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Maven",
        "name": "org.springframework.boot:spring-boot-elasticsearch"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.0.0"
            },
            {
              "fixed": "4.0.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-40970"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-295"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-05-06T18:38:23Z",
    "nvd_published_at": "2026-04-27T19:16:52Z",
    "severity": "MODERATE"
  },
  "details": "When configured to use an SSL bundle, Spring Boot\u0027s Elasticsearch auto-configuration does not perform hostname verification when connecting to the Elasticsearch server.\n\nAffected: Spring Boot 4.0.0\u20134.0.5; upgrade to 4.0.6 or later per vendor advisory.",
  "id": "GHSA-c96x-rpm4-349p",
  "modified": "2026-05-06T18:38:23Z",
  "published": "2026-04-27T21:31:02Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-40970"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/spring-projects/spring-boot"
    },
    {
      "type": "WEB",
      "url": "https://github.com/spring-projects/spring-boot/releases/tag/v4.0.6"
    },
    {
      "type": "WEB",
      "url": "https://spring.io/security/cve-2026-40970"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Spring Boot\u0027s Elasticsearch auto-configuration doesn\u0027t perform hostname verification when connecting to the Elasticsearch server."
}

CVE-2026-40970 (GCVE-0-2026-40970)

Vulnerability from cvelistv5 – Published: 2026-04-27 19:09 – Updated: 2026-04-27 19:30

Summary

When configured to use an SSL bundle, Spring Boot's Elasticsearch auto-configuration does not perform hostname verification when connecting to the Elasticsearch server. Affected: Spring Boot 4.0.0–4.0.5; upgrade to 4.0.6 or later per vendor advisory.

Severity

5 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-295 - Improper Certificate Validation

Assigner

vmware

References

1 reference

URL	Tags
https://spring.io/security/cve-2026-40970

Impacted products

1 product

Vendor	Product	Version
Spring	Spring Boot	Affected: 4.0.0 , < 4.0.6 (custom)

Show details on NVD website

JSON

To clipboard

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                "options": [
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                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-04-27T19:30:39.247639Z",
                "version": "2.0.3"
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          "product": "Spring Boot",
          "vendor": "Spring",
          "versions": [
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        }
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      "metrics": [
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            "attackComplexity": "HIGH",
            "attackVector": "ADJACENT_NETWORK",
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            "baseScore": 5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
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    "dateReserved": "2026-04-16T02:18:56.133Z",
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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-C96X-RPM4-349P

CVE-2026-40970 (GCVE-0-2026-40970)

Tags

Sightings

Nomenclature