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GHSA-Q6GH-6V2R-HJV3

Vulnerability from github – Published: 2026-07-09 13:36 – Updated: 2026-07-09 13:36

Summary

Micronaut: DefaultHttpClient follows redirects, forwarding Authorization, Cookie, and Proxy-Authorization headers

Details

Impact

DefaultHttpClient follows redirects and forwards Authorization, Cookie, and Proxy-Authorization headers to redirect targets across domain boundaries. The blocklist only filters Host/Connection/TE/CT/CL. Additionally, no maximum redirect count exists, enabling infinite loop DoS. Affected: DefaultHttpClient.java lines 231-245, 1591, 2071

Suggested fix: Strip sensitive headers on cross-domain redirects

Patches

It has been patched for versions:

For Micronaut 5, versions equal or greater than 5.0.1 >= For Micronaut 4, versions equal or greater than 4.10.24 >= For Micronaut 3, versions equal or greater than 3.10.6 >=

Workarounds

References

Micronaut 5 Patch: https://github.com/micronaut-projects/micronaut-core/commit/9770328999f490bdfbb9e25addd45bf73d4a173a Micronaut 4 Patch: https://github.com/micronaut-projects/micronaut-core/commit/70cab4b44fbf985faba2846091f2356b5bd70719 Micronaut 3 Patch: https://github.com/micronaut-projects/micronaut-core/commit/64e539736b8168f201d868b02ace50fe14f57418

Severity

6.8 (Medium)


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

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Maven",
        "name": "io.micronaut:micronaut-http-client"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "1.2.8"
            },
            {
              "fixed": "3.10.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Maven",
        "name": "io.micronaut:micronaut-http-client"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.0.0-M1"
            },
            {
              "fixed": "4.10.24"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Maven",
        "name": "io.micronaut:micronaut-http-client"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.0.0-M1"
            },
            {
              "fixed": "5.0.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": true,
    "github_reviewed_at": "2026-07-09T13:36:56Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "### Impact\n\n\u003e DefaultHttpClient follows redirects and forwards Authorization, Cookie, and Proxy-Authorization headers to redirect targets across domain boundaries. The blocklist only filters Host/Connection/TE/CT/CL.\n\u003e Additionally, no maximum redirect count exists, enabling infinite loop DoS.\n\u003e Affected: DefaultHttpClient.java lines 231-245, 1591, 2071\n\n\u003e Suggested fix: Strip sensitive headers on cross-domain redirects\n\n### Patches\nIt has been patched for versions: \n\nFor Micronaut 5, versions equal or greater than 5.0.1 \u003e=\nFor Micronaut 4, versions equal or greater than 4.10.24 \u003e=\nFor Micronaut 3, versions equal or greater than 3.10.6 \u003e=\n\n### Workarounds\nNo\n\n### References\nMicronaut 5 Patch: https://github.com/micronaut-projects/micronaut-core/commit/9770328999f490bdfbb9e25addd45bf73d4a173a\nMicronaut 4 Patch: https://github.com/micronaut-projects/micronaut-core/commit/70cab4b44fbf985faba2846091f2356b5bd70719\nMicronaut 3 Patch: https://github.com/micronaut-projects/micronaut-core/commit/64e539736b8168f201d868b02ace50fe14f57418",
  "id": "GHSA-q6gh-6v2r-hjv3",
  "modified": "2026-07-09T13:36:56Z",
  "published": "2026-07-09T13:36:56Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/micronaut-projects/micronaut-core/security/advisories/GHSA-q6gh-6v2r-hjv3"
    },
    {
      "type": "WEB",
      "url": "https://github.com/micronaut-projects/micronaut-core/commit/64e539736b8168f201d868b02ace50fe14f57418"
    },
    {
      "type": "WEB",
      "url": "https://github.com/micronaut-projects/micronaut-core/commit/70cab4b44fbf985faba2846091f2356b5bd70719"
    },
    {
      "type": "WEB",
      "url": "https://github.com/micronaut-projects/micronaut-core/commit/9770328999f490bdfbb9e25addd45bf73d4a173a"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/micronaut-projects/micronaut-core"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Micronaut: DefaultHttpClient follows redirects, forwarding Authorization, Cookie, and Proxy-Authorization headers"
}

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.

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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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