Security advisory

{
  "id": "c329682a9d763b38cd63058d3d99d31d2a96a645e167d6e4aced1af59b1ee7d5",
  "url": "https://osv.dev/vulnerability/CVE-2021-23339",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-23339",
    "summary": "This affects all versions before 10.1.14 and from 10.2.0 to 10.2.4 of package com.typesafe.akka:akka-http-core. It allows multiple Transfer-Encoding headers.",
    "evidence": "osv:CVE-2021-23339",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2021-23339",
      "aliases": [
        "CVE-2021-23339",
        "GHSA-2w7w-2j92-44hx",
        "SNYK-JAVA-COMTYPESAFEAKKA-1075043"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/akka/akka-http",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "dee7063926b0058989d72a84629a4176ce6f9283"
                },
                {
                  "introduced": "80ebb83d75f1c6c45ded2901efbe97dd43c2051d"
                },
                {
                  "fixed": "af9aae88ab045c3bb7096b8c83f66abec48f51fe"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:lightbend:akka-http:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "10.1.14"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:lightbend:akka-http:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "10.2.0"
                      },
                      {
                        "fixed": "10.2.4"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v10.2.3",
            "v10.2.2",
            "v10.1.13",
            "v10.2.1",
            "v10.2.0",
            "v10.1.12",
            "v10.1.11",
            "v10.1.10",
            "v10.1.9",
            "v10.1.8",
            "v10.1.7",
            "v10.1.6",
            "v10.1.5",
            "v10.1.4",
            "v10.1.3",
            "v10.1.2",
            "v10.1.1",
            "v10.1.0",
            "v10.1.0-RC2",
            "v10.1.0-RC1",
            "v10.0.11",
            "v10.0.10",
            "v10.0.9",
            "v10.0.8",
            "v10.0.7",
            "v10.0.6",
            "v10.0.5",
            "v10.0.4",
            "v10.0.3",
            "v10.0.1",
            "v10.0.0",
            "v10.0.0-RC2",
            "v3.0.0-RC1",
            "imported-from-v2.4.11"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-23339.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:29.258500031Z",
      "provider": "osv",
      "references": [
        "https://snyk.io/vuln/SNYK-JAVA-COMTYPESAFEAKKA-1075043",
        "https://github.com/akka/akka-http/pull/3754%23issuecomment-779265201"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-23339",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 432280,
  "published_at": "2021-02-17T08:15:11.33+00:00"
}