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CVE-2026-45799

7.5 · HIGH

Wire provides gRPC and protocol buffers for Android, Kotlin, Swift, and Java.

Published Jul 17, 2026CWE-129EPSS 0.73%

Overview

CVE-2026-45799 is a high-severity vulnerability. It was published on July 17, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/square/wire/commit/47d5b0dba53935d5332cd41a80a353b3fc90e7b0GitHubgithub.com/square/wire/commit/e4e56fab38a547d9625f05c97f1d8f0bcc3a5773GitHubgithub.com/square/wire/pull/3595GitHubgithub.com/square/wire/pull/3597GitHubgithub.com/square/wire/releases/tag/6.3.0GitHubgithub.com/square/wire/releases/tag/7.0.0-alpha03GitHubgithub.com/square/wire/security/advisories/GHSA-7xpr-hc2w-34m9GitHubgithub.com/square/wire/security/advisories/GHSA-7xpr-hc2w-34m9

How CyberStrike helps

Frequently asked questions

What is CVE-2026-45799?

CVE-2026-45799 is a high-severity vulnerability. It was published on July 17, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2026-45799?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-45799?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-45799?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-45799 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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