CVE-2026-9521

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-9521", "assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5", "state": "PUBLISHED", "assignerShortName": "VulDB", "dateReserved": "2026-05-25T19:17:31.511Z", "datePublished": "2026-05-26T02:00:15.197Z", "dateUpdated": "2026-05-26T12:21:05.803Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "1af790b2-7ee1-4545-860a-a788eba489b5", "shortName": "VulDB", "dateUpdated": "2026-05-26T02:00:15.197Z"}, "title": "fraillt bitsery std_smart_ptr.h loadFromSharedState improper validation of specified type of input", "problemTypes": [{"descriptions": [{"type": "CWE", "cweId": "CWE-1287", "lang": "en", "description": "Improper Validation of Specified Type of Input"}]}, {"descriptions": [{"type": "CWE", "cweId": "CWE-20", "lang": "en", "description": "Improper Input Validation"}]}], "affected": [{"vendor": "fraillt", "product": "bitsery", "versions": [{"version": "5.2.0", "status": "affected"}, {"version": "5.2.1", "status": "affected"}, {"version": "5.2.2", "status": "affected"}, {"version": "5.2.3", "status": "affected"}, {"version": "5.2.4", "status": "affected"}, {"version": "5.2.5", "status": "unaffected"}], "cpes": ["cpe:2.3:a:fraillt:bitsery:*:*:*:*:*:*:*:*"]}], "descriptions": [{"lang": "en", "value": "A security vulnerability has been detected in fraillt bitsery up to 5.2.4. Affected is the function loadFromSharedState in the library include/bitsery/ext/std_smart_ptr.h. Such manipulation leads to improper validation of specified type of input. It is possible to launch the attack remotely. The exploit has been disclosed publicly and may be used. Upgrading to version 5.2.5 is able to address this issue. The name of the patch is 66d16516e24893bebc1c8af52bf2fe9ad0735061. Upgrading the affected component is advised."}], "metrics": [{"cvssV4_0": {"version": "4.0", "baseScore": 6.3, "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P", "baseSeverity": "MEDIUM"}}, {"cvssV3_1": {"version": "3.1", "baseScore": 7.3, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C", "baseSeverity": "HIGH"}}, {"cvssV3_0": {"version": "3.0", "baseScore": 7.3, "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C", "baseSeverity": "HIGH"}}, {"cvssV2_0": {"version": "2.0", "baseScore": 7.5, "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P/E:POC/RL:OF/RC:C"}}], "timeline": [{"time": "2026-05-25T00:00:00.000Z", "lang": "en", "value": "Advisory disclosed"}, {"time": "2026-05-25T02:00:00.000Z", "lang": "en", "value": "VulDB entry created"}, {"time": "2026-05-25T21:22:35.000Z", "lang": "en", "value": "VulDB entry last update"}], "credits": [{"lang": "en", "value": "trebledj (VulDB User)", "type": "reporter"}], "references": [{"url": "https://vuldb.com/vuln/365541", "name": "VDB-365541 | fraillt bitsery std_smart_ptr.h loadFromSharedState improper validation of specified type of input", "tags": ["vdb-entry", "technical-description"]}, {"url": "https://vuldb.com/vuln/365541/cti", "name": "VDB-365541 | CTI Indicators (IOB, IOC, IOA)", "tags": ["signature", "permissions-required"]}, {"url": "https://vuldb.com/submit/814457", "name": "Submit #814457 | fraillt bitsery 5.2.4 CWE-1287, CWE-843 (Type Confusion)", "tags": ["third-party-advisory"]}, {"url": "https://gist.github.com/TrebledJ/750abc64a826f19dd2d6774724629b71", "tags": ["exploit"]}, {"url": "https://github.com/fraillt/bitsery/blob/master/CHANGELOG.md#525-2025-10-09", "tags": ["release-notes"]}, {"url": "https://github.com/fraillt/bitsery/commit/66d16516e24893bebc1c8af52bf2fe9ad0735061", "tags": ["patch"]}, {"url": "https://github.com/fraillt/bitsery/releases/tag/v5.2.5", "tags": ["patch"]}, {"url": "https://github.com/fraillt/bitsery/", "tags": ["product"]}], "tags": ["x_open-source"]}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-05-26T12:19:20.320392Z", "id": "CVE-2026-9521", "options": [{"Exploitation": "poc"}, {"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": "2026-05-26T12:21:05.803Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-9521", "role": "CISA Coordinator", "options": [{"Exploitation": "poc"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-05-26T12:19:20.320392Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-05-26T12:20:58.814Z"}}], "cna": {"tags": ["x_open-source"], "title": "fraillt bitsery std_smart_ptr.h loadFromSharedState improper validation of specified type of input", "credits": [{"lang": "en", "type": "reporter", "value": "trebledj (VulDB User)"}], "metrics": [{"cvssV4_0": {"version": "4.0", "baseScore": 6.3, "baseSeverity": "MEDIUM", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P"}}, {"cvssV3_1": {"version": "3.1", "baseScore": 7.3, "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C"}}, {"cvssV3_0": {"version": "3.0", "baseScore": 7.3, "baseSeverity": "HIGH", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C"}}, {"cvssV2_0": {"version": "2.0", "baseScore": 7.5, "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P/E:POC/RL:OF/RC:C"}}], "affected": [{"cpes": ["cpe:2.3:a:fraillt:bitsery:*:*:*:*:*:*:*:*"], "vendor": "fraillt", "product": "bitsery", "versions": [{"status": "affected", "version": "5.2.0"}, {"status": "affected", "version": "5.2.1"}, {"status": "affected", "version": "5.2.2"}, {"status": "affected", "version": "5.2.3"}, {"status": "affected", "version": "5.2.4"}, {"status": "unaffected", "version": "5.2.5"}]}], "timeline": [{"lang": "en", "time": "2026-05-25T00:00:00.000Z", "value": "Advisory disclosed"}, {"lang": "en", "time": "2026-05-25T02:00:00.000Z", "value": "VulDB entry created"}, {"lang": "en", "time": "2026-05-25T21:22:35.000Z", "value": "VulDB entry last update"}], "references": [{"url": "https://vuldb.com/vuln/365541", "name": "VDB-365541 | fraillt bitsery std_smart_ptr.h loadFromSharedState improper validation of specified type of input", "tags": ["vdb-entry", "technical-description"]}, {"url": "https://vuldb.com/vuln/365541/cti", "name": "VDB-365541 | CTI Indicators (IOB, IOC, IOA)", "tags": ["signature", "permissions-required"]}, {"url": "https://vuldb.com/submit/814457", "name": "Submit #814457 | fraillt bitsery 5.2.4 CWE-1287, CWE-843 (Type Confusion)", "tags": ["third-party-advisory"]}, {"url": "https://gist.github.com/TrebledJ/750abc64a826f19dd2d6774724629b71", "tags": ["exploit"]}, {"url": "https://github.com/fraillt/bitsery/blob/master/CHANGELOG.md#525-2025-10-09", "tags": ["release-notes"]}, {"url": "https://github.com/fraillt/bitsery/commit/66d16516e24893bebc1c8af52bf2fe9ad0735061", "tags": ["patch"]}, {"url": "https://github.com/fraillt/bitsery/releases/tag/v5.2.5", "tags": ["patch"]}, {"url": "https://github.com/fraillt/bitsery/", "tags": ["product"]}], "descriptions": [{"lang": "en", "value": "A security vulnerability has been detected in fraillt bitsery up to 5.2.4. Affected is the function loadFromSharedState in the library include/bitsery/ext/std_smart_ptr.h. Such manipulation leads to improper validation of specified type of input. It is possible to launch the attack remotely. The exploit has been disclosed publicly and may be used. Upgrading to version 5.2.5 is able to address this issue. The name of the patch is 66d16516e24893bebc1c8af52bf2fe9ad0735061. Upgrading the affected component is advised."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-1287", "description": "Improper Validation of Specified Type of Input"}]}, {"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-20", "description": "Improper Input Validation"}]}], "providerMetadata": {"orgId": "1af790b2-7ee1-4545-860a-a788eba489b5", "shortName": "VulDB", "dateUpdated": "2026-05-26T02:00:15.197Z"}}}, "cveMetadata": {"cveId": "CVE-2026-9521", "state": "PUBLISHED", "dateUpdated": "2026-05-26T12:21:05.803Z", "dateReserved": "2026-05-25T19:17:31.511Z", "assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5", "datePublished": "2026-05-26T02:00:15.197Z", "assignerShortName": "VulDB"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"cpes": ["cpe:2.3:a:fraillt:bitsery:*:*:*:*:*:*:*:*"], "product": "bitsery", "vendor": "fraillt", "versions": [{"status": "affected", "version": "5.2.0"}, {"status": "affected", "version": "5.2.1"}, {"status": "affected", "version": "5.2.2"}, {"status": "affected", "version": "5.2.3"}, {"status": "affected", "version": "5.2.4"}, {"status": "unaffected", "version": "5.2.5"}]}], "source": "cna@vuldb.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A security vulnerability has been detected in fraillt bitsery up to 5.2.4. Affected is the function loadFromSharedState in the library include/bitsery/ext/std_smart_ptr.h. Such manipulation leads to improper validation of specified type of input. It is possible to launch the attack remotely. The exploit has been disclosed publicly and may be used. Upgrading to version 5.2.5 is able to address this issue. The name of the patch is 66d16516e24893bebc1c8af52bf2fe9ad0735061. Upgrading the affected component is advised."}, {"lang": "es", "value": "Una vulnerabilidad de seguridad ha sido detectada en fraillt bitsery hasta 5.2.4. Afectada es la funci\u00f3n loadFromSharedState en la biblioteca include/bitsery/ext/std_smart_ptr.h. Dicha manipulaci\u00f3n lleva a una validaci\u00f3n incorrecta del tipo de entrada especificado. Es posible lanzar el ataque remotamente. El exploit ha sido divulgado p\u00fablicamente y puede ser utilizado. Actualizar a la versi\u00f3n 5.2.5 es capaz de abordar este problema. El nombre del parche es 66d16516e24893bebc1c8af52bf2fe9ad0735061. Se aconseja actualizar el componente afectado."}], "id": "CVE-2026-9521", "lastModified": "2026-07-23T11:10:00.120", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "HIGH", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 7.5, "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 6.4, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "cna@vuldb.com", "type": "Secondary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 7.3, "baseSeverity": "HIGH", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.4, "source": "cna@vuldb.com", "type": "Secondary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 2.9, "baseSeverity": "LOW", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "PROOF_OF_CONCEPT", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "LOW", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "LOW", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "cna@vuldb.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-9521", "options": [{"exploitation": "poc"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-05-26T12:19:20.320392Z", "version": "2.0.3"}}]}, "published": "2026-05-26T02:16:40.983", "references": [{"source": "cna@vuldb.com", "url": "https://gist.github.com/TrebledJ/750abc64a826f19dd2d6774724629b71"}, {"source": "cna@vuldb.com", "url": "https://github.com/fraillt/bitsery/"}, {"source": "cna@vuldb.com", "url": "https://github.com/fraillt/bitsery/blob/master/CHANGELOG.md#525-2025-10-09"}, {"source": "cna@vuldb.com", "url": "https://github.com/fraillt/bitsery/commit/66d16516e24893bebc1c8af52bf2fe9ad0735061"}, {"source": "cna@vuldb.com", "url": "https://github.com/fraillt/bitsery/releases/tag/v5.2.5"}, {"source": "cna@vuldb.com", "url": "https://vuldb.com/submit/814457"}, {"source": "cna@vuldb.com", "url": "https://vuldb.com/vuln/365541"}, {"source": "cna@vuldb.com", "url": "https://vuldb.com/vuln/365541/cti"}], "sourceIdentifier": "cna@vuldb.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-20"}, {"lang": "en", "value": "CWE-1287"}], "source": "cna@vuldb.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "5.2.0"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "5.2.1"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "5.2.2"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "5.2.3"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "5.2.4"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "5.2.5"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "bitsery", "source": "cna", "vendor": "fraillt"}, "product": "bitsery", "vendor": "fraillt"}], "created": "2026-05-26T04:00:13.682280+00:00", "updated": "2026-05-26T12:59:42.773417+00:00", "vendors": ["fraillt", "fraillt$PRODUCT$bitsery"]}