Vulnerability-Lookup

CVE-2026-47844 (GCVE-0-2026-47844)

Vulnerability from cvelistv5 – Published: 2026-08-26 19:22 – Updated: 2026-08-26 19:44

Title

Reactor Netty HTTP Server Leaks Exception Details

Summary

In specific scenarios, the Reactor Netty HTTP Server may leak exception details across unrelated requests. In order for this to happen, the server must be configured with Brave Tracing. Reactor Netty 1.3.0 - 1.3.6 Reactor Netty 1.1.0 - 1.2.18 Reactor Netty 1.0.52 and earlier

Severity

5.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/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 19:32 UTC

CWE

CWE-668 Exposure of Resource to Wrong Sphere

Assigner

vmware mitre root

References

1 reference

URL	Tags
https://spring.io/security/cve-2026-47844

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

Show details on NVD website

JSON

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FKIE_CVE-2026-47844

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

Severity

5.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Summary

References

	URL	Tags
	security@vmware.com	https://spring.io/security/cve-2026-47844

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
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          "defaultStatus": "unaffected",
          "product": "Reactor Netty",
          "vendor": "Spring",
          "versions": [
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              "lessThanOrEqual": "1.3.6",
              "status": "affected",
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              "versionType": "custom"
            },
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              "lessThanOrEqual": "1.2.18",
              "status": "affected",
              "version": "1.1.0",
              "versionType": "custom"
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              "lessThanOrEqual": "1.0.52",
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              "version": "0",
              "versionType": "custom"
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GHSA-XCW7-34P4-WRP4

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

Details

Severity

5.3 (Medium)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-47844"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-26T20:17:26Z",
    "severity": "MODERATE"
  },
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  "id": "GHSA-xcw7-34p4-wrp4",
  "modified": "2026-08-26T21:31:43Z",
  "published": "2026-08-26T21:31:43Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-47844"
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      "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-2026-47844 (GCVE-0-2026-47844)

FKIE_CVE-2026-47844

GHSA-XCW7-34P4-WRP4

Tags

Sightings

Nomenclature