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.
Fix
Patch, vendor advisory and mitigation references on NVD 4
- https://github.com/square/wire/commit/47d5b0dba53935d5332cd41a80a353b3fc90e7b0 Patch
- https://github.com/square/wire/commit/e4e56fab38a547d9625f05c97f1d8f0bcc3a5773 Patch
- https://github.com/square/wire/security/advisories/GHSA-7xpr-hc2w-34m9 Vendor Advisory, Exploit
- https://github.com/square/wire/security/advisories/GHSA-7xpr-hc2w-34m9 Vendor Advisory, Exploit
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 7.5 · squareupNVD modified 2026-10-24 20:10
Affected (CPE criteria) 3
cpe:2.3:a:squareup:wire:*:*:*:*:*:*:*:*cpe:2.3:a:squareup:wire:7.0.0:alpha01:*:*:*:*:*:*cpe:2.3:a:squareup:wire:7.0.0:alpha02:*:*:*:*:*:*
References 8
- https://github.com/square/wire/commit/47d5b0dba53935d5332cd41a80a353b3fc90e7b0 Patch
- https://github.com/square/wire/commit/e4e56fab38a547d9625f05c97f1d8f0bcc3a5773 Patch
- https://github.com/square/wire/pull/3595 Issue Tracking
- https://github.com/square/wire/pull/3597 Issue Tracking
- https://github.com/square/wire/releases/tag/6.3.0 Release Notes
- https://github.com/square/wire/releases/tag/7.0.0-alpha03 Release Notes
- https://github.com/square/wire/security/advisories/GHSA-7xpr-hc2w-34m9 Vendor Advisory, Exploit
- https://github.com/square/wire/security/advisories/GHSA-7xpr-hc2w-34m9 Vendor Advisory, Exploit