Vulnerability in com.squareup.wire:wire-runtime-jvm (CVE-2026-45799)
Summary
Vulnerability in com.squareup.wire:wire-runtime-jvm (CVE-2026-45799). Risk of unauthorized operations or information disclosure. Exploitable via IOException. Mitigation: upgrade to 7.0.0-alpha03 or later.
Original description
The description as published by the source.
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.
Source: GitHub Security Advisories (Global) NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-45799 has been found in com.squareup.wire:wire-runtime-jvm.
Attackers can target a specific entry point like IOException over the network to misuse the product.
Risk of unauthorized operations or information disclosure. CVSS score: 7.5/10.
What to do: upgrade com.squareup.wire:wire-runtime-jvm to 7.0.0-alpha03 or later.
If unsure, ask your IT team or search "com.squareup.wire:wire-runtime-jvm CVE-2026-45799" on the vendor's site.
CVE-2026-45799 (com.squareup.wire:wire-runtime-jvm) — CWE-129 / CVSS v3 7.5
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Attack surface: IOException / ProtocolException / master / LENGTH_DELIMITED
Patched: 7.0.0-alpha03 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
A vulnerability (CWE-129) exists in com.squareup.wire:wire-runtime-jvm. Attackers reach the vulnerable code path via IOException without authentication.
Check the vendor advisory for the affected versions of com.squareup.wire:wire-runtime-jvm. Attack surface: IOException / ProtocolException / master / LENGTH_DELIMITED.
Severity: High (CVSS 7.5/10). Risk of unauthorized operations or information disclosure.
Update to 7.0.0-alpha03.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Audit SBOM/dependencies to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
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1Identify exposure identify
Audit SBOM/dependencies for affected components.資産台帳・SBOM・依存マニフェストで com.squareup.wire:wire-runtime-jvm を使っているサービスとバージョンを洗い出す。
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2Apply patch patch
Upgrade com.squareup.wire:wire-runtime-jvm to 7.0.0-alpha03ステージング環境で 7.0.0-alpha03 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
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3Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Affected packages
Fix status by distribution
Fixed packages published by each distribution for this CVE
- Ubuntu UBUNTU-CVE-2026-45799 grpc
References
- advisory github.com
- advisory nvd.nist.gov
- advisory github.com
- package github.com
- patch github.com
- patch github.com
- patch github.com
- patch github.com
- web github.com
- web github.com
- web github.com