{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-96760", "assignerOrgId": "37e5125f-f79b-445b-8fad-9564f167944b", "state": "PUBLISHED", "assignerShortName": "certcc", "dateReserved": "2026-09-23T15:59:27.145Z", "datePublished": "2026-09-28T19:37:58.973Z", "dateUpdated": "2026-10-01T13:58:32.806Z"}, "containers": {"cna": {"title": "Authlib library contains a signature\u2011verification bypass vulnerability", "descriptions": [{"lang": "en", "value": "Authlib (v1.7.2 and below) contains a signature verification bypass vulnerability. The JsonWebSignature.deserialize_json() method accepts a JSON Serialization JWS object and returns the payload as successfully verified without checking for a signature and without requiring a cryptographic key."}], "source": {"discovery": "UNKNOWN"}, "affected": [{"vendor": "Authlib", "product": "Authlib", "versions": [{"status": "affected", "version": "1.7.2"}]}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "CWE-347 Improper Verification of Cryptographic Signature"}]}, {"descriptions": [{"lang": "en", "description": "CWE-670 Always-Incorrect Control Flow Implementation"}]}, {"descriptions": [{"lang": "en", "description": "CWE-358 Improperly Implemented Security Check for Standard"}]}, {"descriptions": [{"lang": "en", "description": "CWE-20 Improper Input Validation"}]}], "references": [{"url": "https://github.com/authlib/authlib"}, {"url": "https://kb.cert.org/vuls/id/762428"}], "x_generator": {"engine": "VINCE 3.0.49", "env": "prod", "origin": "https://cveawg.mitre.org/api/cve/CVE-2026-96760"}, "providerMetadata": {"orgId": "37e5125f-f79b-445b-8fad-9564f167944b", "shortName": "certcc", "dateUpdated": "2026-09-28T19:37:58.973Z"}}, "adp": [{"title": "CVE Program Container", "references": [{"url": "https://www.kb.cert.org/vuls/id/762428"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2026-09-28T20:07:57.835Z"}}, {"problemTypes": [{"descriptions": [{"type": "CWE", "cweId": "CWE-347", "lang": "en", "description": "CWE-347 Improper Verification of Cryptographic Signature"}, {"type": "CWE", "cweId": "CWE-670", "lang": "en", "description": "CWE-670 Always-Incorrect Control Flow Implementation"}, {"type": "CWE", "cweId": "CWE-358", "lang": "en", "description": "CWE-358 Improperly Implemented Security Check for Standard"}, {"type": "CWE", "cweId": "CWE-20", "lang": "en", "description": "CWE-20 Improper Input Validation"}]}], "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.8, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}}, {"other": {"type": "ssvc", "content": {"timestamp": "2026-10-01T13:57:45.534196Z", "id": "CVE-2026-96760", "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": "2026-10-01T13:58:32.806Z"}}]}}

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-96760", "assignerOrgId": "37e5125f-f79b-445b-8fad-9564f167944b", "state": "PUBLISHED", "assignerShortName": "certcc", "dateReserved": "2026-09-23T15:59:27.145Z", "datePublished": "2026-09-28T19:37:58.973Z", "dateUpdated": "2026-10-01T13:58:32.806Z"}, "containers": {"cna": {"title": "Authlib library contains a signature\u2011verification bypass vulnerability", "descriptions": [{"lang": "en", "value": "Authlib (v1.7.2 and below) contains a signature verification bypass vulnerability. The JsonWebSignature.deserialize_json() method accepts a JSON Serialization JWS object and returns the payload as successfully verified without checking for a signature and without requiring a cryptographic key."}], "source": {"discovery": "UNKNOWN"}, "affected": [{"vendor": "Authlib", "product": "Authlib", "versions": [{"status": "affected", "version": "1.7.2"}]}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "CWE-347 Improper Verification of Cryptographic Signature"}]}, {"descriptions": [{"lang": "en", "description": "CWE-670 Always-Incorrect Control Flow Implementation"}]}, {"descriptions": [{"lang": "en", "description": "CWE-358 Improperly Implemented Security Check for Standard"}]}, {"descriptions": [{"lang": "en", "description": "CWE-20 Improper Input Validation"}]}], "references": [{"url": "https://github.com/authlib/authlib"}, {"url": "https://kb.cert.org/vuls/id/762428"}], "x_generator": {"engine": "VINCE 3.0.49", "env": "prod", "origin": "https://cveawg.mitre.org/api/cve/CVE-2026-96760"}, "providerMetadata": {"orgId": "37e5125f-f79b-445b-8fad-9564f167944b", "shortName": "certcc", "dateUpdated": "2026-09-28T19:37:58.973Z"}}, "adp": [{"title": "CVE Program Container", "references": [{"url": "https://www.kb.cert.org/vuls/id/762428"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2026-09-28T20:07:57.835Z"}}, {"title": "CISA ADP Vulnrichment", "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.8, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2026-96760", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-01T13:57:45.534196Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-347", "description": "CWE-347 Improper Verification of Cryptographic Signature"}, {"lang": "en", "type": "CWE", "cweId": "CWE-670", "description": "CWE-670 Always-Incorrect Control Flow Implementation"}, {"lang": "en", "type": "CWE", "cweId": "CWE-358", "description": "CWE-358 Improperly Implemented Security Check for Standard"}, {"lang": "en", "type": "CWE", "cweId": "CWE-20", "description": "CWE-20 Improper Input Validation"}]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-01T13:57:31.119Z"}}]}}

{"affected": [{"affectedData": [{"product": "Authlib", "vendor": "Authlib", "versions": [{"status": "affected", "version": "1.7.2"}]}], "source": "cret@cert.org"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Authlib (v1.7.2 and below) contains a signature verification bypass vulnerability. The JsonWebSignature.deserialize_json() method accepts a JSON Serialization JWS object and returns the payload as successfully verified without checking for a signature and without requiring a cryptographic key."}], "id": "CVE-2026-96760", "lastModified": "2026-10-01T14:17:32.147", "metrics": {"cvssMetricV31": [{"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": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-96760", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-10-01T13:57:45.534196Z", "version": "2.0.3"}}]}, "published": "2026-09-28T20:17:11.703", "references": [{"source": "cret@cert.org", "url": "https://github.com/authlib/authlib"}, {"source": "cret@cert.org", "url": "https://kb.cert.org/vuls/id/762428"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://www.kb.cert.org/vuls/id/762428"}], "sourceIdentifier": "cret@cert.org", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-20"}, {"lang": "en", "value": "CWE-347"}, {"lang": "en", "value": "CWE-358"}, {"lang": "en", "value": "CWE-670"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "authlib: authlib: Signature verification bypass via deserialize_json", "id": "2542633", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2542633"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N", "status": "draft"}, "cwe": "CWE-347", "details": ["A flaw was found in authlib. This flaw allows a remote attacker to bypass digital signature verification and submit forged data. When processing a JSON Web Signature (JWS, a format used to verify data integrity), the deserialize_json() function marks payloads as successfully verified without validating cryptographic signatures or requiring a verification key. Consequently, an attacker can supply manipulated data that the application treats as authentic and trusted, potentially leading to unauthorized access."], "name": "CVE-2026-96760", "package_state": [{"cpe": "cpe:/a:redhat:exploit_intelligence:0", "fix_state": "Affected", "package_name": "exploit-intelligence/vulnerability-analysis-rhel9", "product_name": "Exploit Intelligence"}, {"cpe": "cpe:/a:redhat:lightspeed_core", "fix_state": "Affected", "package_name": "lightspeed-core/lightspeed-stack-rhel9", "product_name": "Lightspeed Core"}, {"cpe": "cpe:/a:redhat:migration_toolkit_applications:8", "fix_state": "Affected", "package_name": "mta/mta-solution-server-rhel9", "product_name": "Migration Toolkit for Applications 8"}, {"cpe": "cpe:/a:redhat:openshift_lightspeed", "fix_state": "Affected", "package_name": "openshift-lightspeed/lightspeed-agentic-sandbox-rhel9", "product_name": "OpenShift Lightspeed"}, {"cpe": "cpe:/a:redhat:ansible_automation_platform:2", "fix_state": "Affected", "package_name": "ansible-automation-platform-26/lightspeed-chatbot-rhel9", "product_name": "Red Hat Ansible Automation Platform 2"}, {"cpe": "cpe:/a:redhat:ansible_automation_platform:2", "fix_state": "Affected", "package_name": "ansible-automation-platform-27/lightspeed-chatbot-rhel9", "product_name": "Red Hat Ansible Automation Platform 2"}, {"cpe": "cpe:/a:redhat:rhel_cla:1", "fix_state": "Affected", "package_name": "rhel-cla/rhel-knowledge-bridge-rhel10", "product_name": "Red Hat Enterprise Linux command line assistant"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Not affected", "package_name": "jaeger", "product_name": "Red Hat Hardened Images"}, {"cpe": "cpe:/a:redhat:container_native_virtualization:4", "fix_state": "Affected", "package_name": "container-native-virtualization/ocp-virt-validation-checkup-rhel9", "product_name": "Red Hat OpenShift Virtualization 4"}, {"cpe": "cpe:/a:redhat:quay:3", "fix_state": "Affected", "package_name": "quay/quay-rhel8", "product_name": "Red Hat Quay 3"}, {"cpe": "cpe:/a:redhat:quay:3", "fix_state": "Affected", "package_name": "quay/quay-rhel9", "product_name": "Red Hat Quay 3"}, {"cpe": "cpe:/a:redhat:satellite:6", "fix_state": "Affected", "package_name": "satellite/foreman-mcp-server-rhel9", "product_name": "Red Hat Satellite 6"}], "public_date": "2026-09-28T19:37:58Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-96760\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-96760\nhttps://github.com/authlib/authlib\nhttps://kb.cert.org/vuls/id/762428"], "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "1.7.2"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Authlib", "source": "cna", "vendor": "Authlib"}, "product": "authlib", "vendor": "authlib"}], "created": "2026-09-28T21:00:04.719663+00:00", "updated": "2026-10-01T16:15:10.917759+00:00", "vendors": ["authlib", "authlib$PRODUCT$authlib"]}