{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-5087", "assignerOrgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "state": "PUBLISHED", "assignerShortName": "CPANSec", "dateReserved": "2026-03-28T19:29:58.433Z", "datePublished": "2026-03-31T16:03:08.278Z", "dateUpdated": "2026-04-01T14:43:35.295Z"}, "containers": {"cna": {"affected": [{"collectionURL": "https://cpan.org/modules", "defaultStatus": "unaffected", "packageName": "PAGI-Middleware-Session-Store-Cookie", "product": "PAGI::Middleware::Session::Store::Cookie", "programFiles": ["lib/PAGI/Middleware/Session/Store/Cookie.pm"], "programRoutines": [{"name": "PAGI::Middleware::Session::Store::Cookie::_random_bytes"}], "repo": "https://github.com/jjn1056/PAGI-Middleware-Session-Store-Cookie", "vendor": "JJNAPIORK", "versions": [{"lessThanOrEqual": "0.001003", "status": "affected", "version": "0", "versionType": "custom"}]}], "descriptions": [{"lang": "en", "value": "PAGI::Middleware::Session::Store::Cookie versions through 0.001003 for Perl generates random bytes insecurely.\n\nPAGI::Middleware::Session::Store::Cookie attempts to read bytes from the /dev/urandom device directly. If that fails (for example, on systems without the device, such as Windows), then it will emit a warning that recommends the user install Crypt::URandom, and then return a string of random bytes generated by the built-in rand function, which is unsuitable for cryptographic applications.\n\nThis modules does not use the Crypt::URandom module, and installing it will not fix the problem.\n\nThe random bytes are used for generating an initialisation vector (IV) to encrypt the cookie.\n\nA predictable IV may make it easier for malicious users to decrypt and tamper with the session data that is stored in the cookie."}], "problemTypes": [{"descriptions": [{"cweId": "CWE-338", "description": "CWE-338 Use of Cryptographically Weak Pseudo-Random Number Generator", "lang": "en", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-1204", "description": "CWE-1204 Generation of Weak Initialization Vector (IV)", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "shortName": "CPANSec", "dateUpdated": "2026-03-31T16:03:08.278Z"}, "references": [{"url": "https://metacpan.org/release/JJNAPIORK/PAGI-Middleware-Session-Store-Cookie-0.001003/source/lib/PAGI/Middleware/Session/Store/Cookie.pm#L156-173"}, {"tags": ["release-notes"], "url": "https://metacpan.org/release/JJNAPIORK/PAGI-Middleware-Session-Store-Cookie-0.001004/changes"}], "solutions": [{"lang": "en", "value": "Upgrade to version 0.001004 or newer."}], "source": {"discovery": "UNKNOWN"}, "title": "PAGI::Middleware::Session::Store::Cookie versions through 0.001003 for Perl generates random bytes insecurely", "x_generator": {"engine": "cpansec-cna-tool 0.1"}}, "adp": [{"title": "CVE Program Container", "references": [{"url": "http://www.openwall.com/lists/oss-security/2026/03/31/10"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2026-03-31T18:18:48.427Z"}}, {"metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}}, {"other": {"type": "ssvc", "content": {"timestamp": "2026-04-01T14:40:20.356872Z", "id": "CVE-2026-5087", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-04-01T14:43:35.295Z"}}]}}

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{"cveTags": [], "descriptions": [{"lang": "en", "value": "PAGI::Middleware::Session::Store::Cookie versions through 0.001003 for Perl generates random bytes insecurely.\n\nPAGI::Middleware::Session::Store::Cookie attempts to read bytes from the /dev/urandom device directly. If that fails (for example, on systems without the device, such as Windows), then it will emit a warning that recommends the user install Crypt::URandom, and then return a string of random bytes generated by the built-in rand function, which is unsuitable for cryptographic applications.\n\nThis modules does not use the Crypt::URandom module, and installing it will not fix the problem.\n\nThe random bytes are used for generating an initialisation vector (IV) to encrypt the cookie.\n\nA predictable IV may make it easier for malicious users to decrypt and tamper with the session data that is stored in the cookie."}], "id": "CVE-2026-5087", "lastModified": "2026-04-01T16:23:52.180", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}, "published": "2026-03-31T16:16:35.080", "references": [{"source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "url": "https://metacpan.org/release/JJNAPIORK/PAGI-Middleware-Session-Store-Cookie-0.001003/source/lib/PAGI/Middleware/Session/Store/Cookie.pm#L156-173"}, {"source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "url": "https://metacpan.org/release/JJNAPIORK/PAGI-Middleware-Session-Store-Cookie-0.001004/changes"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.openwall.com/lists/oss-security/2026/03/31/10"}], "sourceIdentifier": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-338"}, {"lang": "en", "value": "CWE-1204"}], "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,0.001003]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "PAGI::Middleware::Session::Store::Cookie", "source": "cna", "vendor": "JJNAPIORK"}, "product": "pagi::middleware::session::store::cookie", "vendor": "jjnapiork"}], "analysis": {"en": {"generated_at": "2026-04-02T04:54:59.823262+00:00", "value": {"mitigation_remediation": ["Upgrade to PAGI::Middleware::Session::Store::Cookie version 0.001004 or newer.", "Verify that the new version does not use the built\u2011in rand function for IV generation.", "If immediate upgrade is not possible, avoid using cookie storage or disable encryption until patched."], "summary": {"action": "Patch", "impact": "Session hijacking"}, "threat_synthesis": {"affected_systems": "Vulnerable versions are those distributed by JJNAPIORK under the name PAGI::Middleware::Session::Store::Cookie, specifically any release up to and including 0.001003. Versions 0.001004 and newer address the issue.", "description_and_impact": "Versions of PAGI::Middleware::Session::Store::Cookie up to 0.001003 generate an initialization vector using Perl's built\u2011in rand function instead of a cryptographically secure source. Because the IV is predictable, the cookie that the module encrypts can be reasoned about by an attacker. This allows a malicious user to decrypt the session data, modify it, or forge new cookies, thereby compromising the integrity and confidentiality of user sessions.", "risk_and_exploitability": "The weakness carries a CVSS score of 7.5, indicating high severity, while the EPSS score is below 1\u202f% and the vulnerability is not listed in CISA\u2019s KEV catalog. The likely attack vector is remote: an attacker who can influence the cookie value\u2014such as a compromised client sending a crafted request\u2014can exploit the predictable IV to decrypt and tamper with the cookie. Because the flaw resides in the random number generator used for encryption, exploitation does not require special privileges on the host system but does rely on the ability to send the cookie to the server. Based on the available data, the probability of exploitation appears low, but the impact is significant if achieved."}}}}, "created": "2026-03-31T19:54:00.561109+00:00", "updated": "2026-04-02T07:53:16.424311+00:00", "vendors": ["jjnapiork", "jjnapiork$PRODUCT$pagi::middleware::session::store::cookie"]}