Vulnerabilities in pkg:maven/org.http4s/http4s-ember-server_2.12

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-fm4g-76c9-7w69",
  "modified" : "2026-09-15T19:54:37Z",
  "published" : "2026-09-15T19:54:37Z",
  "aliases" : [ "CVE-2026-69208" ],
  "summary" : "Http4s: DigestAuth nonce map grows unbounded",
  "details" : "The `DigestAuth` server middleware's stale-nonce cleanup uses an inverted comparison: it removes *fresh* nonces and stops at the first *stale* one.  Because a new nonce is created for every unauthenticated challenge, an attacker can drive the nonce map to grow without bound until the JVM runs out of heap.\n\n## Impact\n\nUnauthenticated remote denial of service (gradual heap exhaustion / OOM) against\nany service using DigestAuth.  The leak is persistent.\n\n## Preconditions\n\n- Application uses `DigestAuth` on at least one route.\n\n## Workarounds\n\n- Front the DigestAuth protected routes with a rate limiter to slow the leak.\n- Restart periodically.\n\n## Fixes\n\n- The eviction logic is corrected.\n- A max cache size of 1000000 is imposed to protected against a burst between evictions.  This limit is not yet configurable.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.http4s:http4s-ember-server_2.12"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.23.35"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 0.23.34"
    }
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.http4s:http4s-ember-server_2.13"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.23.35"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 0.23.34"
    }
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.http4s:http4s-ember-server_3"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.23.35"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 0.23.34"
    }
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.http4s:http4s-ember-server_2.13"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "1.0.0-M1"
      }, {
        "fixed" : "1.0.0-M47"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 1.0.0-M46"
    }
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.http4s:http4s-ember-server_3"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "1.0.0-M1"
      }, {
        "fixed" : "1.0.0-M47"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 1.0.0-M46"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/http4s/http4s/security/advisories/GHSA-fm4g-76c9-7w69"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/http4s/http4s/commit/8cfeda8472954d631dfbe5dc026463a27653e482"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/http4s/http4s"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/http4s/http4s/releases/tag/v0.23.35"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/http4s/http4s/releases/tag/v1.0.0-M47"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-400", "CWE-401" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-09-15T19:54:37Z",
    "nvd_published_at" : null
  }
}