{"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":"<p>ProtobufParser._readStringKey() reads the length prefix of a protobuf map entry's string key into an attacker-controlled int and then checks (_inputPtr + len) &lt;= _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.</p><p>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.</p><p>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.</p>"}]}],"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"}}}}