Description
Wire 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.
Affected products
squareup: wire
References8
- github.com/square/wire/security/advisories/GHSA-7xpr-hc2w-34m9 Vendor AdvisoryExploit
- github.com/square/wire/security/advisories/GHSA-7xpr-hc2w-34m9 Vendor AdvisoryExploit
- github.com/square/wire/commit/47d5b0dba53935d5332cd41a80a353b3f… Patch
- github.com/square/wire/commit/e4e56fab38a547d9625f05c97f1d8f0bc… Patch
- github.com/square/wire/pull/3595 Issue Tracking
- github.com/square/wire/pull/3597 Issue Tracking
- github.com/square/wire/releases/tag/6.3.0 Release Notes
- github.com/square/wire/releases/tag/7.0.0-alpha03 Release Notes
Metrics
- CVSS 3.1
-
7.5
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 1% percentile: 55 · as of 14 November 2026
- CWE
- CWE-129
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