crowdsec — security advisory

{
  "id": "52713494df53ff0c0b76f06a7da40e2b47432fcc46e828615ee230b85ce559c4",
  "url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-44981",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "UBUNTU-CVE-2026-44981",
    "summary": "CrowdSec offers crowdsourced protection against malicious IPs. From 1.7.0 until 1.7.8, the LAPI router used gin-contrib/gzip with DefaultDecompressHandle globally in pkg/apiserver/controllers/controller.go, causing /v1/watchers and /v1/watchers/login to decompress unauthenticated gzip-compressed JSON request bodies without enforcing a maximum decompressed size and allowing excessive heap allocation that can make LAPI unreachable. This issue is fixed in version 1.7.8.",
    "evidence": "osv:UBUNTU-CVE-2026-44981",
    "products": [
      {
        "name": {
          "value": "crowdsec",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "1.4.6-6build1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.4.6-6ubuntu0.24.04.1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.4.6-6ubuntu0.24.04.1+esm1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.4.6-6ubuntu0.24.04.1+esm2",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.4.6-6ubuntu0.24.04.2",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.4.6-6ubuntu0.24.04.2+esm1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.4.6-6ubuntu0.24.04.2+esm2",
            "evidence": "/affected/0/versions"
          }
        ]
      },
      {
        "name": {
          "value": "crowdsec",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "1.4.6-10.1",
            "evidence": "/affected/1/versions"
          }
        ]
      },
      {
        "name": {
          "value": "crowdsec",
          "evidence": "/affected/2/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "1.4.6-10",
            "evidence": "/affected/2/versions"
          },
          {
            "value": "1.4.6-10.1",
            "evidence": "/affected/2/versions"
          },
          {
            "value": "1.4.6-10.1ubuntu0.26.04.1~esm1",
            "evidence": "/affected/2/versions"
          }
        ]
      }
    ],
    "severity": "high",
    "structured": {
      "id": "UBUNTU-CVE-2026-44981",
      "aliases": [
        "UBUNTU-CVE-2026-44981"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"
        },
        {
          "type": "Ubuntu",
          "score": "medium"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "crowdsec",
            "purl": "pkg:deb/ubuntu/crowdsec?arch=source&distro=esm-apps%2Fnoble",
            "ecosystem": "Ubuntu:Pro:24.04:LTS"
          },
          "versions": [
            "1.4.6-6build1",
            "1.4.6-6ubuntu0.24.04.1",
            "1.4.6-6ubuntu0.24.04.1+esm1",
            "1.4.6-6ubuntu0.24.04.1+esm2",
            "1.4.6-6ubuntu0.24.04.2",
            "1.4.6-6ubuntu0.24.04.2+esm1",
            "1.4.6-6ubuntu0.24.04.2+esm2"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44981.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "crowdsec",
                "binary_version": "1.4.6-6ubuntu0.24.04.2+esm2"
              },
              {
                "binary_name": "golang-github-crowdsecurity-crowdsec-dev",
                "binary_version": "1.4.6-6ubuntu0.24.04.2+esm2"
              }
            ]
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "crowdsec",
            "purl": "pkg:deb/ubuntu/crowdsec?arch=source&distro=stonking",
            "ecosystem": "Ubuntu:26.10"
          },
          "versions": [
            "1.4.6-10.1"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44981.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "crowdsec",
                "binary_version": "1.4.6-10.1"
              },
              {
                "binary_name": "golang-github-crowdsecurity-crowdsec-dev",
                "binary_version": "1.4.6-10.1"
              }
            ]
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "crowdsec",
            "purl": "pkg:deb/ubuntu/crowdsec?arch=source&distro=esm-apps%2Fresolute",
            "ecosystem": "Ubuntu:Pro:26.04:LTS"
          },
          "versions": [
            "1.4.6-10",
            "1.4.6-10.1",
            "1.4.6-10.1ubuntu0.26.04.1~esm1"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44981.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "crowdsec",
                "binary_version": "1.4.6-10.1ubuntu0.26.04.1~esm1"
              },
              {
                "binary_name": "golang-github-crowdsecurity-crowdsec-dev",
                "binary_version": "1.4.6-10.1ubuntu0.26.04.1~esm1"
              }
            ]
          }
        }
      ],
      "modified": "2026-10-17T12:58:22.283175594Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-44981"
      ],
      "references": [
        "https://ubuntu.com/security/CVE-2026-44981",
        "https://www.cve.org/CVERecord?id=CVE-2026-44981",
        "https://github.com/crowdsecurity/crowdsec/commit/54a0dfe6c16b7687b0da6634e0b19ef0f5d9bb30",
        "https://github.com/crowdsecurity/crowdsec/commit/56d0d6915f7f25941dc5b4f484028646f6601a37",
        "https://github.com/crowdsecurity/crowdsec/security/advisories/GHSA-273h-gvwr-c3qj"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-44981",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 358617,
  "published_at": "2026-07-16T20:16:00+00:00"
}