{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-3255", "assignerOrgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "state": "PUBLISHED", "assignerShortName": "CPANSec", "dateReserved": "2026-02-26T11:43:17.278Z", "datePublished": "2026-02-27T20:12:35.414Z", "dateUpdated": "2026-02-27T20:12:35.414Z"}, "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": {"orgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "shortName": "CPANSec", "dateUpdated": "2026-02-27T20:12:35.414Z"}, "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"}}}}

{}

{"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."}], "id": "CVE-2026-3255", "lastModified": "2026-02-27T20:21:41.180", "metrics": {}, "published": "2026-02-27T20:21:41.180", "references": [{"source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "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"}], "sourceIdentifier": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-338"}, {"lang": "en", "value": "CWE-340"}], "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "type": "Secondary"}]}

{}

{}