{
  "containers": {
    "cna": {
      "affected": [
        {
          "collectionURL": "https://cpan.org/modules",
          "defaultStatus": "unaffected",
          "packageName": "HTTP-Session2",
          "product": "HTTP::Session2",
          "repo": "https://github.com/tokuhirom/HTTP-Session2",
          "vendor": "TOKUHIROM",
          "versions": [
            {
              "lessThan": "1.12",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "HTTP::Session2 versions before 1.12 for Perl for Perl may generate weak session ids using the rand() function.\n\nThe HTTP::Session2 session id generator returns a SHA-1 hash seeded with the built-in rand function, the epoch time, and the PID. The PID will come from a small set of numbers, and the epoch time may be guessed, if it is not leaked from the HTTP Date header. The built-in rand() function is unsuitable for cryptographic usage.\n\nHTTP::Session2 after version 1.02 will attempt to use the /dev/urandom device to generate a session id, but if the device is unavailable (for example, under Windows), then it will revert to the insecure method described above."
        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-115",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-115 Authentication Bypass"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-340",
              "description": "CWE-340 Generation of Predictable Numbers or Identifiers",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-338",
              "description": "CWE-338 Use of Cryptographically Weak Pseudo-Random Number Generator",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-02-27T20:12:35.414Z",
        "orgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
        "shortName": "CPANSec"
      },
      "references": [
        {
          "url": "https://metacpan.org/release/TOKUHIROM/HTTP-Session2-1.11/source/lib/HTTP/Session2/Random.pm#L35"
        },
        {
          "url": "https://metacpan.org/release/TOKUHIROM/HTTP-Session2-1.01/source/lib/HTTP/Session2/ServerStore.pm#L68"
        },
        {
          "tags": [
            "release-notes"
          ],
          "url": "https://metacpan.org/release/TOKUHIROM/HTTP-Session2-1.12/changes"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/tokuhirom/HTTP-Session2/commit/9cfde4d7e0965172aef5dcfa3b03bb48df93e636.patch"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "HTTP::Session2 has been deprecated since version 1.11. Migrate to a different solution."
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "timeline": [
        {
          "lang": "en",
          "time": "2014-07-31T00:00:00.000Z",
          "value": "version 1.02 HTTP::Session2 released that attempts to use /dev/urandom."
        },
        {
          "lang": "en",
          "time": "2026-02-24T00:00:00.000Z",
          "value": "version 1.11 HTTP::Session2 deprecated"
        },
        {
          "lang": "en",
          "time": "2026-02-26T00:00:00.000Z",
          "value": "version 1.12 HTTP::Session2 released with a fix with a portable solution."
        }
      ],
      "title": "HTTP::Session2 versions before 1.12 for Perl may generate weak session ids using the rand() function",
      "workarounds": [
        {
          "lang": "en",
          "value": "Upgrade to version 1.12 or later."
        }
      ],
      "x_generator": {
        "engine": "cpansec-cna-tool 0.1"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
    "assignerShortName": "CPANSec",
    "cveId": "CVE-2026-3255",
    "datePublished": "2026-02-27T20:12:35.414Z",
    "dateReserved": "2026-02-26T11:43:17.278Z",
    "dateUpdated": "2026-02-27T20:12:35.414Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-3255\",\"sourceIdentifier\":\"9b29abf9-4ab0-4765-b253-1875cd9b441e\",\"published\":\"2026-02-27T20:21:41.180\",\"lastModified\":\"2026-02-27T20:21:41.180\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"HTTP::Session2 versions before 1.12 for Perl for Perl may generate weak session ids using the rand() function.\\n\\nThe HTTP::Session2 session id generator returns a SHA-1 hash seeded with the built-in rand function, the epoch time, and the PID. The PID will come from a small set of numbers, and the epoch time may be guessed, if it is not leaked from the HTTP Date header. The built-in rand() function is unsuitable for cryptographic usage.\\n\\nHTTP::Session2 after version 1.02 will attempt to use the /dev/urandom device to generate a session id, but if the device is unavailable (for example, under Windows), then it will revert to the insecure method described above.\"}],\"metrics\":{},\"weaknesses\":[{\"source\":\"9b29abf9-4ab0-4765-b253-1875cd9b441e\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-338\"},{\"lang\":\"en\",\"value\":\"CWE-340\"}]}],\"references\":[{\"url\":\"https://github.com/tokuhirom/HTTP-Session2/commit/9cfde4d7e0965172aef5dcfa3b03bb48df93e636.patch\",\"source\":\"9b29abf9-4ab0-4765-b253-1875cd9b441e\"},{\"url\":\"https://metacpan.org/release/TOKUHIROM/HTTP-Session2-1.01/source/lib/HTTP/Session2/ServerStore.pm#L68\",\"source\":\"9b29abf9-4ab0-4765-b253-1875cd9b441e\"},{\"url\":\"https://metacpan.org/release/TOKUHIROM/HTTP-Session2-1.11/source/lib/HTTP/Session2/Random.pm#L35\",\"source\":\"9b29abf9-4ab0-4765-b253-1875cd9b441e\"},{\"url\":\"https://metacpan.org/release/TOKUHIROM/HTTP-Session2-1.12/changes\",\"source\":\"9b29abf9-4ab0-4765-b253-1875cd9b441e\"}]}}"
  }
}