Vulnerability-Lookup

CVE-2026-47843 (GCVE-0-2026-47843)

Vulnerability from cvelistv5 – Published: 2026-08-26 19:22 – Updated: 2026-08-26 19:45

Title

Reactor Netty may incorrectly route traffic due to DNS resolver reuse

Summary

In specific scenarios involving multiple clients with different DNS resolver configurations, Reactor Netty may incorrectly reuse a previously configured DNS resolver. Reactor Netty 1.3.0 - 1.3.6 Reactor Netty 1.1.0 - 1.2.18 Reactor Netty 1.0.52 and earlier

Severity

3.7 (Low)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-26 19:31 UTC

CWE

CWE-706 Use of Incorrectly-Resolved Name or Reference

Assigner

vmware mitre root

References

1 reference

URL	Tags
https://spring.io/security/cve-2026-47843

Impacted products

1 product

Vendor	Product	Version	CPE status
Spring	Reactor Netty	Affected: 1.3.0 , ≤ 1.3.6 (custom) Affected: 1.1.0 , ≤ 1.2.18 (custom) Affected: 0 , ≤ 1.0.52 (custom)	guessed

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JSON

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FKIE_CVE-2026-47843

Vulnerability from fkie_nvd - Published: 2026-08-26 20:17 - Updated: 2026-08-26 20:17

Severity

3.7 (Low) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

Summary

References

	URL	Tags
	security@vmware.com	https://spring.io/security/cve-2026-47843

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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    {
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        {
          "defaultStatus": "unaffected",
          "product": "Reactor Netty",
          "vendor": "Spring",
          "versions": [
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              "lessThanOrEqual": "1.3.6",
              "status": "affected",
              "version": "1.3.0",
              "versionType": "custom"
            },
            {
              "lessThanOrEqual": "1.2.18",
              "status": "affected",
              "version": "1.1.0",
              "versionType": "custom"
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            {
              "lessThanOrEqual": "1.0.52",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
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        }
      ],
      "source": "security@vmware.com"
    }
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GHSA-7F23-WCWG-2F8R

Vulnerability from github – Published: 2026-08-26 21:31 – Updated: 2026-08-26 21:31

Details

Severity

3.7 (Low)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-47843"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-26T20:17:26Z",
    "severity": "LOW"
  },
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  "id": "GHSA-7f23-wcwg-2f8r",
  "modified": "2026-08-26T21:31:43Z",
  "published": "2026-08-26T21:31:43Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-47843"
    },
    {
      "type": "WEB",
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      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

CVE-2026-47843 (GCVE-0-2026-47843)

FKIE_CVE-2026-47843

GHSA-7F23-WCWG-2F8R

Tags

Sightings

Nomenclature