{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-110747", "assignerOrgId": "36c7be3b-2937-45df-85ea-ca7133ea542c", "state": "PUBLISHED", "assignerShortName": "HeroDevs", "dateReserved": "2026-10-14T16:51:08.427Z", "datePublished": "2026-10-28T00:02:32.462Z", "dateUpdated": "2026-10-28T00:02:32.462Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "36c7be3b-2937-45df-85ea-ca7133ea542c", "shortName": "HeroDevs", "dateUpdated": "2026-10-28T00:02:32.462Z" }, "title": "jackson-dataformat-protobuf: integer overflow in ProtobufParser._readStringKey() allows OutOfMemoryError from an 8-byte payload", "problemTypes": [ { "descriptions": [ { "lang": "en", "cweId": "CWE-190", "description": "CWE-190 Integer Overflow or Wraparound", "type": "CWE" } ] } ], "impacts": [ { "capecId": "CAPEC-130", "descriptions": [ { "lang": "en", "value": "CAPEC-130 Excessive Allocation" } ] } ], "affected": [ { "vendor": "FasterXML", "product": "jackson-dataformat-protobuf", "collectionURL": "https://repo.maven.apache.org/maven2", "packageName": "com.fasterxml.jackson.dataformat:jackson-dataformat-protobuf", "repo": "https://github.com/FasterXML/jackson-dataformats-binary", "versions": [ { "status": "affected", "version": "2.21.6", "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-protobuf", "collectionURL": "https://repo.maven.apache.org/maven2", "packageName": "tools.jackson.dataformat:jackson-dataformat-protobuf", "repo": "https://github.com/FasterXML/jackson-dataformats-binary", "versions": [ { "status": "affected", "version": "3.1.6", "lessThan": "3.1.8", "versionType": "maven" }, { "status": "unaffected", "version": "3.1.8", "versionType": "maven" }, { "status": "affected", "version": "3.2.2", "lessThan": "3.2.4", "versionType": "maven" }, { "status": "unaffected", "version": "3.2.4", "versionType": "maven" } ], "defaultStatus": "unaffected" } ], "descriptions": [ { "lang": "en", "value": "ProtobufParser._readStringKey() reads the length prefix of a protobuf map entry's string key into an attacker-controlled int and then checks (_inputPtr + len) <= _inputEnd using signed arithmetic. For values near Integer.MAX_VALUE the addition overflows to a negative value and the check passes even when the input contains no key data. The parser then calls _finishShortText(len), which expands the text buffer to the declared length via TextBuffer.expandCurrentSegment and Arrays.copyOf, throwing OutOfMemoryError: Requested array size exceeds VM limit.\n\n\n\nAn 8-byte malformed message containing a map entry with a declared key length of 0x7FFFFFFF is sufficient. Configured StreamReadConstraints, including maxStringLength, maxNameLength, maxDocumentLength and maxNestingDepth, do not prevent the failure. Applications running with -XX:+ExitOnOutOfMemoryError terminate the JVM.\n\n\n\nThis is the same integer-overflow pattern addressed for other call sites in the remediation associated with CVE-2026-104016 and CVE-2026-104017; the map-key call site was corrected on the 3.x branches only, leaving the corresponding 2.x branches unguarded. Release lines 2.18, 2.19 and 2.20 do not contain _readStringKey() and are not affected by this vector. No privileges or user interaction beyond the ability to submit data for parsing are required. The 3.0 release line and 3.1.0-3.1.5 / 3.2.0-3.2.1 do not contain _readStringKey() and are therefore not affected; the method first appears in 3.1.6 and 3.2.2, mirroring its introduction at 2.21.6 on the 2.x side.", "supportingMedia": [ { "type": "text/html", "base64": false, "value": "

ProtobufParser._readStringKey() reads the length prefix of a protobuf map entry's string key into an attacker-controlled int and then checks (_inputPtr + len) <= _inputEnd using signed arithmetic. For values near Integer.MAX_VALUE the addition overflows to a negative value and the check passes even when the input contains no key data. The parser then calls _finishShortText(len), which expands the text buffer to the declared length via TextBuffer.expandCurrentSegment and Arrays.copyOf, throwing OutOfMemoryError: Requested array size exceeds VM limit.

An 8-byte malformed message containing a map entry with a declared key length of 0x7FFFFFFF is sufficient. Configured StreamReadConstraints, including maxStringLength, maxNameLength, maxDocumentLength and maxNestingDepth, do not prevent the failure. Applications running with -XX:+ExitOnOutOfMemoryError terminate the JVM.

This is the same integer-overflow pattern addressed for other call sites in the remediation associated with CVE-2026-104016 and CVE-2026-104017; the map-key call site was corrected on the 3.x branches only, leaving the corresponding 2.x branches unguarded. Release lines 2.18, 2.19 and 2.20 do not contain _readStringKey() and are not affected by this vector. No privileges or user interaction beyond the ability to submit data for parsing are required. The 3.0 release line and 3.1.0-3.1.5 / 3.2.0-3.2.1 do not contain _readStringKey() and are therefore not affected; the method first appears in 3.1.6 and 3.2.2, mirroring its introduction at 2.21.6 on the 2.x side.

" } ] } ], "tags": [ "x_open-source" ], "references": [ { "url": "https://github.com/FasterXML/jackson-dataformats-binary/security/advisories/GHSA-fv7v-rrmh-4qcv", "name": "GHSA-fv7v-rrmh-4qcv", "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": "2026-10-20T22:45:00.000Z", "lang": "en", "value": "GHSA-fv7v-rrmh-4qcv published by the maintainer in FasterXML/jackson-dataformats-binary" } ], "credits": [ { "lang": "en", "value": "bewithyash", "type": "reporter" }, { "lang": "en", "value": "cowtowncoder (Tatu Saloranta)", "type": "coordinator" } ], "source": { "advisory": "GHSA-fv7v-rrmh-4qcv", "discovery": "EXTERNAL" }, "x_generator": { "engine": "Vulnogram 0.5.0" } } } }