{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-19643", "assignerOrgId": "ff89ba41-3aa1-4d27-914a-91399e9639e5", "state": "PUBLISHED", "assignerShortName": "AMZN", "dateReserved": "2026-08-12T16:52:29.486Z", "datePublished": "2026-08-12T19:38:00.653Z", "dateUpdated": "2026-08-13T12:36:31.287Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "ff89ba41-3aa1-4d27-914a-91399e9639e5", "shortName": "AMZN", "dateUpdated": "2026-08-12T19:46:45.274Z" }, "title": "Out-of-bounds read in the Base64 decoder in Amazon aws-sdk-cpp on signed-char platforms", "problemTypes": [ { "descriptions": [ { "lang": "en", "cweId": "CWE-125", "description": "CWE-125 Out-of-bounds read", "type": "CWE" } ] } ], "impacts": [ { "capecId": "CAPEC-540", "descriptions": [ { "lang": "en", "value": "CAPEC-540 Overread Buffers" } ] } ], "affected": [ { "vendor": "AWS", "product": "aws-sdk-cpp", "versions": [ { "status": "affected", "version": "0", "lessThanOrEqual": "1.11.861", "versionType": "custom" } ], "defaultStatus": "unaffected" } ], "cpeApplicability": [ { "operator": "OR", "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:a:aws:aws-sdk-cpp:*:*:*:*:*:*:*:*", "versionStartIncluding": "0", "versionEndIncluding": "1.11.861" } ] } ] } ], "descriptions": [ { "lang": "en", "value": "An out-of-bounds read issue in the Base64 decoder in Amazon aws-sdk-cpp before 1.11.862, on some platforms, might allow a remote authenticated user to crash an application that processes crafted Base64-encoded input.\n\n\n\nTo remediate this issue, users should upgrade to version 1.11.862.", "supportingMedia": [ { "type": "text/html", "base64": false, "value": "

An out-of-bounds read issue in the Base64 decoder in Amazon aws-sdk-cpp before 1.11.862, on some platforms, might allow a remote authenticated user to crash an application that processes crafted Base64-encoded input.

To remediate this issue, users should upgrade to version 1.11.862.

" } ] } ], "references": [ { "url": "https://github.com/aws/aws-sdk-cpp/releases/tag/1.11.862", "tags": [ "release-notes", "patch" ] }, { "url": "https://aws.amazon.com/security/security-bulletins/2026-080-aws/", "tags": [ "vendor-advisory" ] }, { "url": "https://github.com/aws/aws-sdk-cpp/security/advisories/GHSA-mxm9-xpf9-x66x", "tags": [ "release-notes" ] } ], "metrics": [ { "format": "CVSS", "scenarios": [ { "lang": "en", "value": "GENERAL" } ], "cvssV3_1": { "version": "3.1", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH", "baseSeverity": "MEDIUM", "baseScore": 5.3, "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H" } }, { "format": "CVSS", "scenarios": [ { "lang": "en", "value": "GENERAL" } ], "cvssV4_0": { "attackVector": "NETWORK", "attackComplexity": "HIGH", "attackRequirements": "PRESENT", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "subConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "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": "MEDIUM", "baseScore": 6, "vectorString": "CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N" } } ], "credits": [ { "lang": "en", "value": "University of Manchester", "type": "finder" } ], "source": { "discovery": "UNKNOWN" }, "x_generator": { "engine": "Vulnogram 1.0.4" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2026-08-13T12:36:21.058185Z", "id": "CVE-2026-19643", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "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": "2026-08-13T12:36:31.287Z" } } ] } }