Wire: skipGroup() missing negative-length check allows 10-byte payload to crash any Wire-decoding service

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-45799
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-17 20:17:18 UTC
Updated2026-08-12 19:04:04 UTC
DescriptionWire provides gRPC and protocol buffers for Android, Kotlin, Swift, and Java. Prior to 6.3.0 and 7.0.0-alpha03, ByteArrayProtoReader32.skipGroup() and ProtoReader.skipGroup() in wire-runtime do not validate that a LENGTH_DELIMITED field length is non-negative before skip(), allowing a crafted protobuf varint encoding -128 as a signed Int to make skip(-128) move the internal position negative and make the next readByte() throw ArrayIndexOutOfBoundsException instead of the documented IOException or ProtocolException, which can crash services using ProtoAdapter.decode(byte[]) on untrusted payloads. This issue is fixed in versions 6.3.0 and 7.0.0-alpha03.

Risk And Classification

Primary CVSS: v3.1 7.5 HIGH from [email protected]

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

EPSS: 0.005460000 probability, percentile 0.430030000 (date 2026-08-13)

Problem Types: CWE-129 | CWE-129 CWE-129: Improper Validation of Array Index

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.1CNADECLARED7.5HIGHCVSS: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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Squareup Wire All All All All
Application Squareup Wire 7.0.0 alpha01 All All
Application Squareup Wire 7.0.0 alpha02 All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Square Wire affected < 6.3.0 Not specified
CNA Square Wire affected >= 7.0.0-alpha01, < 7.0.0-alpha03 Not specified

References

ReferenceSourceLinkTags
github.com/square/wire/security/advisories/GHSA-7xpr-hc2w-34m9 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com Vendor Advisory, Exploit
github.com/square/wire/pull/3597 [email protected] github.com Issue Tracking
github.com/square/wire/commit/47d5b0dba53935d5332cd41a80a353b3fc90e7b0 [email protected] github.com Patch
github.com/square/wire/releases/tag/6.3.0 [email protected] github.com Release Notes
github.com/square/wire/releases/tag/7.0.0-alpha03 [email protected] github.com Release Notes
github.com/square/wire/pull/3595 [email protected] github.com Issue Tracking
github.com/square/wire/commit/e4e56fab38a547d9625f05c97f1d8f0bcc3a5773 [email protected] github.com Patch
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