{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-40931", "assignerOrgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "state": "PUBLISHED", "assignerShortName": "CPANSec", "dateReserved": "2025-04-16T09:05:34.363Z", "datePublished": "2026-03-05T01:41:09.588Z", "dateUpdated": "2026-03-11T14:59:01.628Z"}, "containers": {"cna": {"affected": [{"collectionURL": "https://cpan.org/modules", "defaultStatus": "unaffected", "packageName": "Apache-Session", "product": "Apache::Session::Generate::MD5", "programFiles": ["lib/Session/Generate/MD5.pm"], "repo": "https://github.com/chorny/Apache-Session", "vendor": "CHORNY", "versions": [{"lessThanOrEqual": "1.94", "status": "affected", "version": "0", "versionType": "custom"}]}], "descriptions": [{"lang": "en", "value": "Apache::Session::Generate::MD5 versions through 1.94 for Perl create insecure session id.\n\nApache::Session::Generate::MD5 generates session ids insecurely. The default session id generator returns a MD5 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. Predicable session ids could allow an attacker to gain access to systems."}], "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": "2026-03-06T03:53:16.136Z"}, "references": [{"url": "https://metacpan.org/dist/Apache-Session/source/lib/Apache/Session/Generate/MD5.pm#L27"}, {"tags": ["technical-description"], "url": "https://security.metacpan.org/docs/guides/random-data-for-security.html"}, {"url": "https://github.com/chorny/Apache-Session/issues/4"}, {"url": "https://rt.cpan.org/Ticket/Display.html?id=173631"}], "solutions": [{"lang": "en", "value": "Consider alternate solutions like https://metacpan.org/pod/Apache::Session::Generate::Random"}], "source": {"discovery": "UNKNOWN"}, "title": "Apache::Session::Generate::MD5 versions through 1.94 for Perl create insecure session id", "x_generator": {"engine": "cpansec-cna-tool 0.1"}}, "adp": [{"title": "CVE Program Container", "references": [{"url": "http://www.openwall.com/lists/oss-security/2026/03/05/3"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2026-03-05T11:12:52.118Z"}}, {"metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.1, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}}, {"other": {"type": "ssvc", "content": {"timestamp": "2026-03-05T16:38:07.301789Z", "id": "CVE-2025-40931", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-03-11T14:59:01.628Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CVE Program Container", "references": [{"url": "http://www.openwall.com/lists/oss-security/2026/03/05/3"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2026-03-05T11:12:52.118Z"}}, {"title": "CISA ADP Vulnrichment", "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.1, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2025-40931", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-03-05T16:38:07.301789Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-03-05T16:38:30.872Z"}}], "cna": {"title": "Apache::Session::Generate::MD5 versions through 1.94 for Perl create insecure session id", "source": {"discovery": "UNKNOWN"}, "impacts": [{"capecId": "CAPEC-115", "descriptions": [{"lang": "en", "value": "CAPEC-115 Authentication Bypass"}]}], "affected": [{"repo": "https://github.com/chorny/Apache-Session", "vendor": "CHORNY", "product": "Apache::Session::Generate::MD5", "versions": [{"status": "affected", "version": "0", "versionType": "custom", "lessThanOrEqual": "1.94"}], "packageName": "Apache-Session", "programFiles": ["lib/Session/Generate/MD5.pm"], "collectionURL": "https://cpan.org/modules", "defaultStatus": "unaffected"}], "solutions": [{"lang": "en", "value": "Consider alternate solutions like https://metacpan.org/pod/Apache::Session::Generate::Random"}], "references": [{"url": "https://metacpan.org/dist/Apache-Session/source/lib/Apache/Session/Generate/MD5.pm#L27"}, {"url": "https://security.metacpan.org/docs/guides/random-data-for-security.html", "tags": ["technical-description"]}, {"url": "https://github.com/chorny/Apache-Session/issues/4"}, {"url": "https://rt.cpan.org/Ticket/Display.html?id=173631"}], "x_generator": {"engine": "cpansec-cna-tool 0.1"}, "descriptions": [{"lang": "en", "value": "Apache::Session::Generate::MD5 versions through 1.94 for Perl create insecure session id.\n\nApache::Session::Generate::MD5 generates session ids insecurely. The default session id generator returns a MD5 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. Predicable session ids could allow an attacker to gain access to systems."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-340", "description": "CWE-340 Generation of Predictable Numbers or Identifiers"}]}, {"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-338", "description": "CWE-338 Use of Cryptographically Weak Pseudo-Random Number Generator"}]}], "providerMetadata": {"orgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "shortName": "CPANSec", "dateUpdated": "2026-03-06T03:53:16.136Z"}}}, "cveMetadata": {"cveId": "CVE-2025-40931", "state": "PUBLISHED", "dateUpdated": "2026-03-11T14:59:01.628Z", "dateReserved": "2025-04-16T09:05:34.363Z", "assignerOrgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "datePublished": "2026-03-05T01:41:09.588Z", "assignerShortName": "CPANSec"}, "dataVersion": "5.2"}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:chorny:apache\\:\\:session\\:\\:generate\\:\\:md5:*:*:*:*:*:perl:*:*", "matchCriteriaId": "D04C726E-3C53-423A-8F6D-C2DC97BD228F", "versionEndIncluding": "1.94", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Apache::Session::Generate::MD5 versions through 1.94 for Perl create insecure session id.\n\nApache::Session::Generate::MD5 generates session ids insecurely. The default session id generator returns a MD5 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. Predicable session ids could allow an attacker to gain access to systems."}], "id": "CVE-2025-40931", "lastModified": "2026-03-09T14:41:36.327", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 9.1, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.2, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}, "published": "2026-03-05T02:16:39.960", "references": [{"source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "tags": ["Issue Tracking"], "url": "https://github.com/chorny/Apache-Session/issues/4"}, {"source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "tags": ["Product"], "url": "https://metacpan.org/dist/Apache-Session/source/lib/Apache/Session/Generate/MD5.pm#L27"}, {"source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "tags": ["Third Party Advisory"], "url": "https://rt.cpan.org/Ticket/Display.html?id=173631"}, {"source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://security.metacpan.org/docs/guides/random-data-for-security.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://www.openwall.com/lists/oss-security/2026/03/05/3"}], "sourceIdentifier": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-338"}, {"lang": "en", "value": "CWE-340"}], "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,1.94]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "Apache::Session::Generate::MD5", "source": "cna", "vendor": "CHORNY"}, "product": "apache::session::generate::md5", "vendor": "chorny"}], "created": "2026-03-06T15:17:59.741317+00:00", "updated": "2026-03-06T15:17:59.741393+00:00", "vendors": ["chorny", "chorny$PRODUCT$apache::session::generate::md5"]}