CVE-2026-5190

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-5190", "assignerOrgId": "ff89ba41-3aa1-4d27-914a-91399e9639e5", "state": "PUBLISHED", "assignerShortName": "AMZN", "dateReserved": "2026-03-30T20:05:41.435Z", "datePublished": "2026-03-31T17:05:59.601Z", "dateUpdated": "2026-10-20T18:16:59.122Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "ff89ba41-3aa1-4d27-914a-91399e9639e5", "shortName": "AMZN", "dateUpdated": "2026-10-20T18:16:59.122Z"}, "title": "AWS C Event Stream Streaming Decoder Stack Buffer Overflow", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-787", "description": "CWE-787: Out-of-bounds Write", "type": "CWE"}]}], "impacts": [{"capecId": "CAPEC-100", "descriptions": [{"lang": "en", "value": "CAPEC-100: Overflow Buffers"}]}], "affected": [{"vendor": "AWS", "product": "aws-c-event-stream", "versions": [{"status": "affected", "version": "0", "lessThan": "0.6.0", "versionType": "custom"}], "defaultStatus": "unaffected"}], "cpeApplicability": [{"operator": "OR", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:aws:aws-c-event-stream:*:*:*:*:*:*:*:*", "versionStartIncluding": "0", "versionEndExcluding": "0.6.0"}]}]}], "descriptions": [{"lang": "en", "value": "Out-of-bounds write in the streaming decoder component in aws-c-event-stream before 0.6.0 might allow a third party operating a server to cause memory corruption leading to arbitrary code execution on a client application that processes crafted event-stream messages.\n\n\n\nTo remediate this issue, users should upgrade to version 0.6.0 or later.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>Out-of-bounds write in the streaming decoder component in aws-c-event-stream before 0.6.0 might allow a third party operating a server to cause memory corruption leading to arbitrary code execution on a client application that processes crafted event-stream messages.</p><p>To remediate this issue, users should upgrade to version 0.6.0 or later.</p>"}]}], "references": [{"url": "https://aws.amazon.com/security/security-bulletins/2026-011-aws/", "tags": ["vendor-advisory"]}, {"url": "https://github.com/awslabs/aws-c-event-stream/security/advisories/GHSA-xvjw-fjq5-68hf", "tags": ["third-party-advisory"]}, {"url": "https://github.com/awslabs/aws-c-event-stream/releases/tag/v0.6.0", "tags": ["patch"]}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV3_1": {"version": "3.1", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH", "baseSeverity": "HIGH", "baseScore": 7.5, "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H"}}, {"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "HIGH", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "userInteraction": "PASSIVE", "vulnConfidentialityImpact": "HIGH", "subConfidentialityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "subIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "version": "4.0", "baseSeverity": "HIGH", "baseScore": 7.7, "vectorString": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"}}], "source": {"discovery": "UNKNOWN"}, "x_generator": {"engine": "Vulnogram 1.0.1"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-03-31T00:00:00+00:00", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3", "id": "CVE-2026-5190"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-04-01T03:55:47.631Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-5190", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-03-31T17:46:52.774144Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-03-31T17:48:08.997Z"}}], "cna": {"title": "AWS C Event Stream Streaming Decoder Stack Buffer Overflow", "source": {"discovery": "UNKNOWN"}, "impacts": [{"capecId": "CAPEC-100", "descriptions": [{"lang": "en", "value": "CAPEC-100: Overflow Buffers"}]}], "metrics": [{"format": "CVSS", "cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "REQUIRED", "attackComplexity": "HIGH", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}, {"format": "CVSS", "cvssV4_0": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 7.7, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "HIGH", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "PASSIVE", "attackComplexity": "HIGH", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "affected": [{"vendor": "AWS", "product": "aws-c-event-stream", "versions": [{"status": "affected", "version": "0", "lessThan": "0.6.0", "versionType": "custom"}], "defaultStatus": "unaffected"}], "references": [{"url": "https://aws.amazon.com/security/security-bulletins/2026-011-aws/", "tags": ["vendor-advisory"]}, {"url": "https://github.com/awslabs/aws-c-event-stream/security/advisories/GHSA-xvjw-fjq5-68hf", "tags": ["third-party-advisory"]}, {"url": "https://github.com/awslabs/aws-c-event-stream/releases/tag/v0.6.0", "tags": ["patch"]}], "x_generator": {"engine": "Vulnogram 1.0.1"}, "descriptions": [{"lang": "en", "value": "Out-of-bounds write in the streaming decoder component in aws-c-event-stream before 0.6.0 might allow a third party operating a server to cause memory corruption leading to arbitrary code execution on a client application that processes crafted event-stream messages.\n\n\n\nTo remediate this issue, users should upgrade to version 0.6.0 or later.", "supportingMedia": [{"type": "text/html", "value": "<p>Out-of-bounds write in the streaming decoder component in aws-c-event-stream before 0.6.0 might allow a third party operating a server to cause memory corruption leading to arbitrary code execution on a client application that processes crafted event-stream messages.</p><p>To remediate this issue, users should upgrade to version 0.6.0 or later.</p>", "base64": false}]}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-787", "description": "CWE-787: Out-of-bounds Write"}]}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:aws:aws-c-event-stream:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "0.6.0", "versionStartIncluding": "0"}], "operator": "OR"}], "operator": "OR"}], "providerMetadata": {"orgId": "ff89ba41-3aa1-4d27-914a-91399e9639e5", "shortName": "AMZN", "dateUpdated": "2026-10-20T18:16:59.122Z"}}}, "cveMetadata": {"cveId": "CVE-2026-5190", "state": "PUBLISHED", "dateUpdated": "2026-10-20T18:16:59.122Z", "dateReserved": "2026-03-30T20:05:41.435Z", "assignerOrgId": "ff89ba41-3aa1-4d27-914a-91399e9639e5", "datePublished": "2026-03-31T17:05:59.601Z", "assignerShortName": "AMZN"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "aws-c-event-stream", "vendor": "AWS", "versions": [{"lessThan": "0.6.0", "status": "affected", "version": "0", "versionType": "custom"}]}], "source": "ff89ba41-3aa1-4d27-914a-91399e9639e5"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Out-of-bounds write in the streaming decoder component in aws-c-event-stream before 0.6.0 might allow a third party operating a server to cause memory corruption leading to arbitrary code execution on a client application that processes crafted event-stream messages.\n\n\n\nTo remediate this issue, users should upgrade to version 0.6.0 or later."}, {"lang": "es", "value": "Escritura fuera de l\u00edmites en el componente decodificador de streaming en aws-c-event-stream anterior a la versi\u00f3n 0.6.0 podr\u00eda permitir a un tercero que opere un servidor causar corrupci\u00f3n de memoria, lo que lleva a la ejecuci\u00f3n de c\u00f3digo arbitrario en una aplicaci\u00f3n cliente que procesa mensajes event-stream manipulados.\n\nPara remediar este problema, los usuarios deber\u00edan actualizar a la versi\u00f3n 0.6.0 o posterior."}], "id": "CVE-2026-5190", "lastModified": "2026-10-20T19:17:38.930", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.6, "impactScore": 5.9, "source": "ff89ba41-3aa1-4d27-914a-91399e9639e5", "type": "Secondary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "HIGH", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 7.7, "baseSeverity": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "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": "PASSIVE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/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": "HIGH", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "ff89ba41-3aa1-4d27-914a-91399e9639e5", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-5190", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-03-31T00:00:00+00:00", "version": "2.0.3"}}]}, "published": "2026-03-31T18:16:59.080", "references": [{"source": "ff89ba41-3aa1-4d27-914a-91399e9639e5", "url": "https://aws.amazon.com/security/security-bulletins/2026-011-aws/"}, {"source": "ff89ba41-3aa1-4d27-914a-91399e9639e5", "url": "https://github.com/awslabs/aws-c-event-stream/releases/tag/v0.6.0"}, {"source": "ff89ba41-3aa1-4d27-914a-91399e9639e5", "url": "https://github.com/awslabs/aws-c-event-stream/security/advisories/GHSA-xvjw-fjq5-68hf"}], "sourceIdentifier": "ff89ba41-3aa1-4d27-914a-91399e9639e5", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-787"}], "source": "ff89ba41-3aa1-4d27-914a-91399e9639e5", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "0.6.0"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "aws-c-event-stream", "source": "cna", "vendor": "AWS"}, "product": "aws-c-event-stream", "vendor": "aws"}], "created": "2026-03-31T19:53:49.020570+00:00", "updated": "2026-10-23T09:00:15.776790+00:00", "vendors": ["aws", "aws$PRODUCT$aws-c-event-stream"]}