CVE-2026-110747
Full vulnerability record from the local CVENow database.
Description
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.
View original CVE JSON
{
"id": "CVE-2026-110747",
"sourceIdentifier": "36c7be3b-2937-45df-85ea-ca7133ea542c",
"published": "2026-10-28T01:16:55.017",
"lastModified": "2026-10-28T15:24:56.033",
"vulnStatus": "Deferred",
"cveTags": [],
"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."
}
],
"affected": [
{
"source": "36c7be3b-2937-45df-85ea-ca7133ea542c",
"affectedData": [
{
"vendor": "FasterXML",
"product": "jackson-dataformat-protobuf",
"defaultStatus": "unaffected",
"collectionURL": "https://repo.maven.apache.org/maven2",
"packageName": "com.fasterxml.jackson.dataformat:jackson-dataformat-protobuf",
"repo": "https://github.com/FasterXML/jackson-dataformats-binary",
"versions": [
{
"version": "2.21.6",
"lessThan": "2.21.8",
"versionType": "maven",
"status": "affected"
},
{
"version": "2.21.8",
"versionType": "maven",
"status": "unaffected"
},
{
"version": "2.22.0",
"lessThan": "2.22.4",
"versionType": "maven",
"status": "affected"
},
{
"version": "2.22.4",
"versionType": "maven",
"status": "unaffected"
}
]
},
{
"vendor": "FasterXML",
"product": "jackson-dataformat-protobuf",
"defaultStatus": "unaffected",
"collectionURL": "https://repo.maven.apache.org/maven2",
"packageName": "tools.jackson.dataformat:jackson-dataformat-protobuf",
"repo": "https://github.com/FasterXML/jackson-dataformats-binary",
"versions": [
{
"version": "3.1.6",
"lessThan": "3.1.8",
"versionType": "maven",
"status": "affected"
},
{
"version": "3.1.8",
"versionType": "maven",
"status": "unaffected"
},
{
"version": "3.2.2",
"lessThan": "3.2.4",
"versionType": "maven",
"status": "affected"
},
{
"version": "3.2.4",
"versionType": "maven",
"status": "unaffected"
}
]
}
]
}
],
"metrics": {
"cvssMetricV31": [
{
"source": "36c7be3b-2937-45df-85ea-ca7133ea542c",
"type": "Secondary",
"cvssData": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"attackVector": "NETWORK",
"attackComplexity": "LOW",
"privilegesRequired": "NONE",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"availabilityImpact": "HIGH"
},
"exploitabilityScore": 3.9,
"impactScore": 3.6
}
]
},
"weaknesses": [
{
"source": "36c7be3b-2937-45df-85ea-ca7133ea542c",
"type": "Secondary",
"description": [
{
"lang": "en",
"value": "CWE-190"
}
]
}
],
"references": [
{
"url": "https://github.com/FasterXML/jackson-dataformats-binary/security/advisories/GHSA-fv7v-rrmh-4qcv",
"source": "36c7be3b-2937-45df-85ea-ca7133ea542c"
}
]
}