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trafficserver — security advisory

Type: advisorySources: OSVAdvisory ID: DEBIAN-CVE-2021-32566

Improper Input Validation vulnerability in HTTP/2 of Apache Traffic Server allows an attacker to DOS the server. This issue affects Apache Traffic Server 7.0.0 to 7.1.12, 8.0.0 to 8.1.1, 9.0.0 to 9.0.1.

Products
trafficserver
Affected versions
Not specified
Fixed versions
8.1.1+ds-1.1
CVEs
CVE-2021-32566
Confirmed fixed CVEs
Not specified
Updated in this feed
1 Nov 2026, 00:49 UTC · Revision 1

Source evidence

DEBIAN-CVE-2021-32566

core-osv · Original source

Published 30 Jun 2021, 08:15 UTC

Improper Input Validation vulnerability in HTTP/2 of Apache Traffic Server allows an attacker to DOS the server. This issue affects Apache Traffic Server 7.0.0 to 7.1.12, 8.0.0 to 8.1.1, 9.0.0 to 9.0.1.

osv:DEBIAN-CVE-2021-32566

trafficserver

Fixed versions: 8.1.1+ds-1.1

Complete source record
{
  "id": "24bcece8056c2722ab94bf4219c654477aafbaafc43994acf060606b2a1935b4",
  "url": "https://osv.dev/vulnerability/DEBIAN-CVE-2021-32566",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "DEBIAN-CVE-2021-32566",
    "summary": "Improper Input Validation vulnerability in HTTP/2 of Apache Traffic Server allows an attacker to DOS the server. This issue affects Apache Traffic Server 7.0.0 to 7.1.12, 8.0.0 to 8.1.1, 9.0.0 to 9.0.1.",
    "evidence": "osv:DEBIAN-CVE-2021-32566",
    "products": [
      {
        "name": {
          "value": "trafficserver",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "8.1.1+ds-1.1",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "DEBIAN-CVE-2021-32566",
      "aliases": [
        "DEBIAN-CVE-2021-32566"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "8.1.1+ds-1.1"
                }
              ]
            }
          ],
          "package": {
            "name": "trafficserver",
            "purl": "pkg:deb/debian/trafficserver?arch=source&distro=bookworm",
            "ecosystem": "Debian:12"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2021-32566.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        }
      ],
      "modified": "2026-10-23T18:03:49.070362087Z",
      "provider": "osv",
      "upstream": [
        "CVE-2021-32566"
      ],
      "references": [
        "https://security-tracker.debian.org/tracker/CVE-2021-32566"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2021-32566",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 422341,
  "published_at": "2021-06-30T08:15:06.737+00:00"
}