CVE-2026-45799

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.

CVSS 3.1

7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS

0.7% chance of exploitation in the next 30 days; higher than 53% of CVEs (scores of 2026-10-25)

CWE

CWE-129

Published

2026-07-17

Modified

2026-10-24

Record from

the NVD, synced 2026-10-25

Affected

• squareup:wire

Packages (OSV)

References

• https://github.com/square/wire/commit/47d5b0dba53935d5332cd41a80a353b3fc90e7b0
• https://github.com/square/wire/commit/e4e56fab38a547d9625f05c97f1d8f0bcc3a5773
• https://github.com/square/wire/pull/3595
• https://github.com/square/wire/pull/3597
• https://github.com/square/wire/releases/tag/6.3.0

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