Bug 2501947 (CVE-2026-45799)

Summary: CVE-2026-45799 com.squareup.wire/wire-runtime: com.squareup.wire/wire-runtime-jvm: Wire: Remote Denial of Service due to improper protobuf length validation
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: ewittman, fmongiar, gmalinko, janstey, jnethert, nipatil, pantinor, pdelbell, rkubis, rstepani
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in Wire, a library used for gRPC and protocol buffers. In the wire-runtime component, a remote attacker can exploit improper validation of a length-delimited field. By sending a crafted protobuf message with a negative length, the system attempts to access an invalid memory location, leading to a denial of service (DoS) by crashing affected services.
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Description OSIDB Bzimport 2026-07-17 21:02:54 UTC 
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.
Comment 3 Jon Orris 2026-09-22 14:01:37 UTC 
This issue has been addressed in the following products:

  Red Hat Build of Apache Camel 3.33 for Quarkus 3.33.3.SP2

Via RHSA-2026:70257 https://access.redhat.com/errata/RHSA-2026:70257