jackson-dataformat-protobuf: signed integer overflow in string-length paths allows unbounded array allocation and OutOfMemoryError

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-104016
StatePUBLISHED
AssignerHeroDevs
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-28 00:17:10 UTC
Updated2026-11-04 21:17:42 UTC
DescriptionProtobufParser parses length-prefixed protobuf string and bytes fields by checking (_inputPtr + len) <= _inputEnd and then, on the fast path, calling _finishShortText(len). Both use 32-bit signed integer arithmetic. When an attacker supplies a varint decoding to a length near Integer.MAX_VALUE, _inputPtr + len overflows to a negative value, the bounds check passes, and _finishShortText(len) reaches TextBuffer.expandCurrentSegment(len), which performs Arrays.copyOf with no cap and throws OutOfMemoryError: Requested array size exceeds VM limit. The JVM refuses arrays larger than Integer.MAX_VALUE - 8 before consulting available heap, so -Xmx tuning does not mitigate the issue. StreamReadConstraints.maxStringLength and maxDocumentLength do not gate this path: a 33-byte payload is far below any document-length cap and the string-length check does not fire before the allocation. This was confirmed empirically against shipping artifacts with maxStringLength, maxDocumentLength and maxNestingDepth all configured. A February 2026 hardening commit added the equivalent overflow guard to the packed-array-length and message-length paths but left the string-length call sites unguarded. No privileges or user interaction beyond the ability to submit data for parsing are required.

Risk And Classification

Primary CVSS: v3.1 7.5 HIGH from 36c7be3b-2937-45df-85ea-ca7133ea542c

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS: 0.006790000 probability, percentile 0.524650000 (date 2026-11-04)

Problem Types: CWE-190 | CWE-190 CWE-190 Integer Overflow or Wraparound

VersionSourceTypeScoreSeverityVector
3.136c7be3b-2937-45df-85ea-ca7133ea542cSecondary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.1CNACVSS7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA FasterXML Jackson-dataformat-protobuf affected 2.6.0 2.18.12 maven Not specified
CNA FasterXML Jackson-dataformat-protobuf unaffected 2.18.12 maven Not specified
CNA FasterXML Jackson-dataformat-protobuf affected 2.19.0 2.21.8 maven Not specified
CNA FasterXML Jackson-dataformat-protobuf unaffected 2.21.8 maven Not specified
CNA FasterXML Jackson-dataformat-protobuf affected 2.22.0 2.22.4 maven Not specified
CNA FasterXML Jackson-dataformat-protobuf unaffected 2.22.4 maven Not specified
CNA FasterXML Jackson-dataformat-protobuf affected 3.0.0 3.1.8 maven Not specified
CNA FasterXML Jackson-dataformat-protobuf unaffected 3.1.8 maven Not specified
CNA FasterXML Jackson-dataformat-protobuf affected 3.2.0 3.2.4 maven Not specified
CNA FasterXML Jackson-dataformat-protobuf unaffected 3.2.4 maven Not specified

References

ReferenceSourceLinkTags
github.com/FasterXML/jackson-dataformats-binary/security/advisories/GHSA... 36c7be3b-2937-45df-85ea-ca7133ea542c github.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: bewithyash (en)

CNA: cowtowncoder (Tatu Saloranta) (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-10-20T22:46:00.000ZGHSA-c2rq-mcfv-jw29 published by the maintainer in FasterXML/jackson-dataformats-binary

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