Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Squareup | Wire | < 6.3.0 |
Related Weaknesses (CWE)
References
- https://github.com/square/wire/commit/47d5b0dba53935d5332cd41a80a353b3fc90e7b0Patch
- https://github.com/square/wire/commit/e4e56fab38a547d9625f05c97f1d8f0bcc3a5773Patch
- https://github.com/square/wire/pull/3595Issue Tracking
- https://github.com/square/wire/pull/3597Issue Tracking
- https://github.com/square/wire/releases/tag/6.3.0Release Notes
- https://github.com/square/wire/releases/tag/7.0.0-alpha03Release Notes
- https://github.com/square/wire/security/advisories/GHSA-7xpr-hc2w-34m9Vendor AdvisoryExploit
- https://github.com/square/wire/security/advisories/GHSA-7xpr-hc2w-34m9Vendor AdvisoryExploit
FAQ
What is CVE-2026-45799?
CVE-2026-45799 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 va...
How severe is CVE-2026-45799?
CVE-2026-45799 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-45799?
Check the references section above for vendor advisories and patch information. Affected products include: Squareup Wire.