Security advisory

{
  "id": "44a145e41b1bd55ed61cf192e6f18b424f665a1e52b2e65f1401d7475ca74d20",
  "url": "https://osv.dev/vulnerability/CVE-2021-32816",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-32816",
    "summary": "ProtonMail Web Client is the official AngularJS web client for the ProtonMail secure email service. ProtonMail Web Client before version 3.16.60 has a regular expression denial-of-service vulnerability. This was fixed in commit 6687fb. There is a full report available in the referenced GHSL-2021-027.",
    "evidence": "osv:CVE-2021-32816",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2021-32816",
      "aliases": [
        "CVE-2021-32816"
      ],
      "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": [
            {
              "repo": "https://github.com/protonmail/webclients",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "6687fbb867ef872c96cf4fde68cb6e9c58d3fddc"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "fixed": "6687fbb867ef872c96cf4fde68cb6e9c58d3fddc"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-32816.json"
          }
        }
      ],
      "modified": "2026-10-20T11:18:41.547581611Z",
      "provider": "osv",
      "references": [
        "https://github.com/ProtonMail/WebClient/commit/6687fbb867ef872c96cf4fde68cb6e9c58d3fddc",
        "https://securitylab.github.com/advisories/GHSL-2021-027-redos-ProtonMail/"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:a:protonmail:protonmail:*:*:*:*:*:*:*:*"
            ],
            "vendor_product": "protonmail:protonmail",
            "extracted_events": [
              {
                "range": [
                  {
                    "fixed": "3.16.60"
                  }
                ],
                "source": "CPE_RANGE"
              }
            ]
          },
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "fixed": "3.16.60"
                  }
                ],
                "source": "DESCRIPTION"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2021-32816",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 387164,
  "published_at": "2021-05-14T18:15:07.407+00:00"
}