{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-104895", "assignerOrgId": "36c7be3b-2937-45df-85ea-ca7133ea542c", "state": "PUBLISHED", "assignerShortName": "HeroDevs", "dateReserved": "2026-10-02T15:02:48.774Z", "datePublished": "2026-10-28T00:01:44.496Z", "dateUpdated": "2026-10-28T00:01:44.496Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "36c7be3b-2937-45df-85ea-ca7133ea542c", "shortName": "HeroDevs", "dateUpdated": "2026-10-28T00:01:44.496Z"}, "title": "jackson-dataformat-smile: unbounded eager byte[] allocation for raw binary in the async parser allows OutOfMemoryError denial of service", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-789", "description": "CWE-789 Memory Allocation with Excessive Size Value", "type": "CWE"}]}], "impacts": [{"capecId": "CAPEC-130", "descriptions": [{"lang": "en", "value": "CAPEC-130 Excessive Allocation"}]}], "affected": [{"vendor": "FasterXML", "product": "jackson-dataformat-smile", "collectionURL": "https://repo.maven.apache.org/maven2", "packageName": "com.fasterxml.jackson.dataformat:jackson-dataformat-smile", "repo": "https://github.com/FasterXML/jackson-dataformats-binary", "versions": [{"status": "affected", "version": "2.9.0", "lessThan": "2.18.12", "versionType": "maven"}, {"status": "unaffected", "version": "2.18.12", "versionType": "maven"}, {"status": "affected", "version": "2.19.0", "lessThan": "2.21.8", "versionType": "maven"}, {"status": "unaffected", "version": "2.21.8", "versionType": "maven"}, {"status": "affected", "version": "2.22.0", "lessThan": "2.22.4", "versionType": "maven"}, {"status": "unaffected", "version": "2.22.4", "versionType": "maven"}], "defaultStatus": "unaffected"}, {"vendor": "FasterXML", "product": "jackson-dataformat-smile", "collectionURL": "https://repo.maven.apache.org/maven2", "packageName": "tools.jackson.dataformat:jackson-dataformat-smile", "repo": "https://github.com/FasterXML/jackson-dataformats-binary", "versions": [{"status": "affected", "version": "3.0.0", "lessThan": "3.1.8", "versionType": "maven"}, {"status": "unaffected", "version": "3.1.8", "versionType": "maven"}, {"status": "affected", "version": "3.2.0", "lessThan": "3.2.4", "versionType": "maven"}, {"status": "unaffected", "version": "3.2.4", "versionType": "maven"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "The asynchronous Smile parser (NonBlockingByteArrayParser) uses a raw-binary length prefix taken from untrusted input to allocate a byte[] before the body is read, with no upper bound and no overflow check. On the raw-binary marker 0xFD, _decodeVInt() computes (value << 6) + (i & 0x3F) without the (value >>> 25) != 0 overflow guard present in the blocking SmileParser._readUnsignedVInt, and _startRawBinary then allocates the declared length immediately.\n\n\n\nA Smile feed of roughly ten bytes can therefore force an eager allocation of approximately 2 GB, producing an OutOfMemoryError on reactive or asynchronous Smile endpoints. A VInt crafted to overflow int yields a negative length and a NegativeArraySizeException, a RuntimeException that is not a JacksonException and so escapes the parser contract. Either outcome crashes the request or processing thread.\n\n\n\nThis is the same class of issue as CVE-2020-28491 in the CBOR parser of this library, which was fixed with a LONGEST_NON_CHUNKED_BINARY guard; the asynchronous Smile parser never received the equivalent guard. No privileges or user interaction beyond the ability to submit data for parsing are required.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>The asynchronous Smile parser (NonBlockingByteArrayParser) uses a raw-binary length prefix taken from untrusted input to allocate a byte[] before the body is read, with no upper bound and no overflow check. On the raw-binary marker 0xFD, _decodeVInt() computes (value &lt;&lt; 6) + (i &amp; 0x3F) without the (value &gt;&gt;&gt; 25) != 0 overflow guard present in the blocking SmileParser._readUnsignedVInt, and _startRawBinary then allocates the declared length immediately.</p><p>A Smile feed of roughly ten bytes can therefore force an eager allocation of approximately 2 GB, producing an OutOfMemoryError on reactive or asynchronous Smile endpoints. A VInt crafted to overflow int yields a negative length and a NegativeArraySizeException, a RuntimeException that is not a JacksonException and so escapes the parser contract. Either outcome crashes the request or processing thread.</p><p>This is the same class of issue as CVE-2020-28491 in the CBOR parser of this library, which was fixed with a LONGEST_NON_CHUNKED_BINARY guard; the asynchronous Smile parser never received the equivalent guard. No privileges or user interaction beyond the ability to submit data for parsing are required.</p>"}]}], "tags": ["x_open-source"], "references": [{"url": "https://github.com/FasterXML/jackson-dataformats-binary/security/advisories/GHSA-h3c2-2m49-r49w", "name": "GHSA-h3c2-2m49-r49w", "tags": ["vendor-advisory"]}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV3_1": {"version": "3.1", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH", "baseSeverity": "HIGH", "baseScore": 7.5, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}}], "timeline": [{"time": "2026-10-20T22:47:00.000Z", "lang": "en", "value": "GHSA-h3c2-2m49-r49w published by the maintainer in FasterXML/jackson-dataformats-binary"}], "credits": [{"lang": "en", "value": "apvxlab (AppViewX security research)", "type": "reporter"}, {"lang": "en", "value": "Michael-JRead", "type": "reporter"}, {"lang": "en", "value": "cowtowncoder (Tatu Saloranta)", "type": "coordinator"}], "source": {"advisory": "GHSA-h3c2-2m49-r49w", "discovery": "EXTERNAL"}, "x_generator": {"engine": "Vulnogram 0.5.0"}}}}

{}

{"affected": [{"affectedData": [{"collectionURL": "https://repo.maven.apache.org/maven2", "defaultStatus": "unaffected", "packageName": "com.fasterxml.jackson.dataformat:jackson-dataformat-smile", "product": "jackson-dataformat-smile", "repo": "https://github.com/FasterXML/jackson-dataformats-binary", "vendor": "FasterXML", "versions": [{"lessThan": "2.18.12", "status": "affected", "version": "2.9.0", "versionType": "maven"}, {"status": "unaffected", "version": "2.18.12", "versionType": "maven"}, {"lessThan": "2.21.8", "status": "affected", "version": "2.19.0", "versionType": "maven"}, {"status": "unaffected", "version": "2.21.8", "versionType": "maven"}, {"lessThan": "2.22.4", "status": "affected", "version": "2.22.0", "versionType": "maven"}, {"status": "unaffected", "version": "2.22.4", "versionType": "maven"}]}, {"collectionURL": "https://repo.maven.apache.org/maven2", "defaultStatus": "unaffected", "packageName": "tools.jackson.dataformat:jackson-dataformat-smile", "product": "jackson-dataformat-smile", "repo": "https://github.com/FasterXML/jackson-dataformats-binary", "vendor": "FasterXML", "versions": [{"lessThan": "3.1.8", "status": "affected", "version": "3.0.0", "versionType": "maven"}, {"status": "unaffected", "version": "3.1.8", "versionType": "maven"}, {"lessThan": "3.2.4", "status": "affected", "version": "3.2.0", "versionType": "maven"}, {"status": "unaffected", "version": "3.2.4", "versionType": "maven"}]}], "source": "36c7be3b-2937-45df-85ea-ca7133ea542c"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "The asynchronous Smile parser (NonBlockingByteArrayParser) uses a raw-binary length prefix taken from untrusted input to allocate a byte[] before the body is read, with no upper bound and no overflow check. On the raw-binary marker 0xFD, _decodeVInt() computes (value << 6) + (i & 0x3F) without the (value >>> 25) != 0 overflow guard present in the blocking SmileParser._readUnsignedVInt, and _startRawBinary then allocates the declared length immediately.\n\n\n\nA Smile feed of roughly ten bytes can therefore force an eager allocation of approximately 2 GB, producing an OutOfMemoryError on reactive or asynchronous Smile endpoints. A VInt crafted to overflow int yields a negative length and a NegativeArraySizeException, a RuntimeException that is not a JacksonException and so escapes the parser contract. Either outcome crashes the request or processing thread.\n\n\n\nThis is the same class of issue as CVE-2020-28491 in the CBOR parser of this library, which was fixed with a LONGEST_NON_CHUNKED_BINARY guard; the asynchronous Smile parser never received the equivalent guard. No privileges or user interaction beyond the ability to submit data for parsing are required."}], "id": "CVE-2026-104895", "lastModified": "2026-10-28T00:17:11.357", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "36c7be3b-2937-45df-85ea-ca7133ea542c", "type": "Secondary"}]}, "published": "2026-10-28T00:17:11.357", "references": [{"source": "36c7be3b-2937-45df-85ea-ca7133ea542c", "url": "https://github.com/FasterXML/jackson-dataformats-binary/security/advisories/GHSA-h3c2-2m49-r49w"}], "sourceIdentifier": "36c7be3b-2937-45df-85ea-ca7133ea542c", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-789"}], "source": "36c7be3b-2937-45df-85ea-ca7133ea542c", "type": "Secondary"}]}

{}

{"created": "2026-10-28T01:30:14.279615+00:00", "updated": "2026-10-28T01:30:14.279621+00:00", "vendors": []}