CVE-2026-34236

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-34236", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-03-26T16:22:29.034Z", "datePublished": "2026-04-01T17:04:53.378Z", "dateUpdated": "2026-04-01T17:59:59.001Z"}, "containers": {"cna": {"title": "Auth0 PHP SDK Insufficient Entropy in Cookie Encryption", "problemTypes": [{"descriptions": [{"cweId": "CWE-331", "lang": "en", "description": "CWE-331: Insufficient Entropy", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 8.2, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N", "version": "3.1"}}], "references": [{"name": "https://github.com/auth0/auth0-PHP/security/advisories/GHSA-w3wc-44p4-m4j7", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/auth0/auth0-PHP/security/advisories/GHSA-w3wc-44p4-m4j7"}, {"name": "https://github.com/auth0/auth0-PHP/releases/tag/8.19.0", "tags": ["x_refsource_MISC"], "url": "https://github.com/auth0/auth0-PHP/releases/tag/8.19.0"}], "affected": [{"vendor": "auth0", "product": "auth0-PHP", "versions": [{"version": ">= 8.0.0, < 8.19.0", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-04-01T17:04:53.378Z"}, "descriptions": [{"lang": "en", "value": "Auth0-PHP is a PHP SDK for Auth0 Authentication and Management APIs. From version 8.0.0 to before version 8.19.0, in applications built with the Auth0 PHP SDK, cookies are encrypted with insufficient entropy, which may result in threat actors brute-forcing the encryption key and forging session cookies. This issue has been patched in version 8.19.0."}], "source": {"advisory": "GHSA-w3wc-44p4-m4j7", "discovery": "UNKNOWN"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-04-01T17:59:49.583107Z", "id": "CVE-2026-34236", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"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": "2026-04-01T17:59:59.001Z"}}]}}

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-34236", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-03-26T16:22:29.034Z", "datePublished": "2026-04-01T17:04:53.378Z", "dateUpdated": "2026-04-01T17:59:59.001Z"}, "containers": {"cna": {"title": "Auth0 PHP SDK Insufficient Entropy in Cookie Encryption", "problemTypes": [{"descriptions": [{"cweId": "CWE-331", "lang": "en", "description": "CWE-331: Insufficient Entropy", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 8.2, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N", "version": "3.1"}}], "references": [{"name": "https://github.com/auth0/auth0-PHP/security/advisories/GHSA-w3wc-44p4-m4j7", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/auth0/auth0-PHP/security/advisories/GHSA-w3wc-44p4-m4j7"}, {"name": "https://github.com/auth0/auth0-PHP/releases/tag/8.19.0", "tags": ["x_refsource_MISC"], "url": "https://github.com/auth0/auth0-PHP/releases/tag/8.19.0"}], "affected": [{"vendor": "auth0", "product": "auth0-PHP", "versions": [{"version": ">= 8.0.0, < 8.19.0", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-04-01T17:04:53.378Z"}, "descriptions": [{"lang": "en", "value": "Auth0-PHP is a PHP SDK for Auth0 Authentication and Management APIs. From version 8.0.0 to before version 8.19.0, in applications built with the Auth0 PHP SDK, cookies are encrypted with insufficient entropy, which may result in threat actors brute-forcing the encryption key and forging session cookies. This issue has been patched in version 8.19.0."}], "source": {"advisory": "GHSA-w3wc-44p4-m4j7", "discovery": "UNKNOWN"}}, "adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-34236", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-04-01T17:59:49.583107Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-04-01T17:59:53.927Z"}}]}}

{"affected": [{"affectedData": [{"product": "auth0-PHP", "vendor": "auth0", "versions": [{"status": "affected", "version": ">= 8.0.0, < 8.19.0"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:auth0:auth0-php:*:*:*:*:*:*:*:*", "matchCriteriaId": "180C24B0-B1AD-4517-BCF2-10C60124959A", "versionEndExcluding": "8.19.0", "versionStartIncluding": "8.0.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Auth0-PHP is a PHP SDK for Auth0 Authentication and Management APIs. From version 8.0.0 to before version 8.19.0, in applications built with the Auth0 PHP SDK, cookies are encrypted with insufficient entropy, which may result in threat actors brute-forcing the encryption key and forging session cookies. This issue has been patched in version 8.19.0."}, {"lang": "es", "value": "Auth0-PHP es un SDK de PHP para las API de autenticaci\u00f3n y gesti\u00f3n de Auth0. Desde la versi\u00f3n 8.0.0 hasta antes de la versi\u00f3n 8.19.0, en aplicaciones construidas con el SDK de PHP de Auth0, las cookies se cifran con entrop\u00eda insuficiente, lo que puede resultar en que actores de amenazas fuercen la clave de cifrado por fuerza bruta y falsifiquen cookies de sesi\u00f3n. Este problema ha sido parcheado en la versi\u00f3n 8.19.0."}], "id": "CVE-2026-34236", "lastModified": "2026-10-26T21:10:00.170", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 8.2, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.8, "source": "security-advisories@github.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "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:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-34236", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-04-01T17:59:49.583107Z", "version": "2.0.3"}}]}, "published": "2026-04-01T18:16:30.007", "references": [{"source": "security-advisories@github.com", "tags": ["Product", "Release Notes"], "url": "https://github.com/auth0/auth0-PHP/releases/tag/8.19.0"}, {"source": "security-advisories@github.com", "tags": ["Vendor Advisory"], "url": "https://github.com/auth0/auth0-PHP/security/advisories/GHSA-w3wc-44p4-m4j7"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-331"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[8.0.0,8.19.0)"}}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "auth0-PHP", "source": "cna", "vendor": "auth0"}, "product": "auth0-php", "vendor": "auth0"}], "analysis": {"en": {"generated_at": "2026-04-07T21:48:02.233379+00:00", "value": {"mitigation_remediation": ["Upgrade the Auth0 PHP SDK to version 8.19.0 or later, which includes a fix for the key\u2011entropy issue.", "Verify that your deployment is using the patched version and that session cookies are encrypted with a sufficiently robust key."], "summary": {"action": "Immediate patch", "impact": "Session hijacking via forged cookies"}, "threat_synthesis": {"affected_systems": "Affected applications are those that incorporate Auth0\u2019s PHP SDK, specifically Auth0\u2011PHP from version 8.0.0 through 8.18.x. The vulnerability is tied to the auth0:auth0-PHP product family and impacts any PHP\u2011based web service that relies on the SDK for authentication or session management.", "description_and_impact": "The vulnerability resides in Auth0 PHP SDK versions 8.0.0 up to 8.18.x where the cookies used for session tracking are encrypted with a key that lacks sufficient entropy. This weakness permits an attacker to launch a brute\u2011force attack on the encryption key, which in turn enables the attacker to forge valid session cookies. With a forged cookie the attacker can impersonate a legitimate user, gaining full authentication privileges and potentially accessing sensitive data.", "risk_and_exploitability": "The CVSS score of 8.2 indicates high severity, while the EPSS score of less than 1% suggests a low probability of widespread exploitation at the moment. Because the weakness involves cryptographic key entropy, an attacker needs to execute a brute\u2011force attack against the encryption key; however, once the key is recovered, forging a session cookie is straightforward. The absence of a CISA KEV listing and the specific nature of the flaw point to a targeted rather than mass exploitation scenario."}}}}, "created": "2026-04-02T07:48:12.085134+00:00", "updated": "2026-04-08T19:57:03.220886+00:00", "vendors": ["auth0", "auth0$PRODUCT$auth0-php"]}