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CVE-2026-61695

7.5 · HIGH

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

Published Sep 23, 2026CWE-129EPSS 0.69%

Overview

CVE-2026-61695 is a high-severity vulnerability. It was published on September 23, 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 6.4.1 and 7.0.0-alpha04, Wire's Swift runtime ProtoReader.skipGroup(expectedEndTag:unknownFieldsWriter:) accepts a negative length for a LENGTH_DELIMITED field inside an unknown START_GROUP field. ProtoReader.readData() forwards the negative count to ReadBuffer.readData(count:), whose upper-bound-only check permits the value to reach Foundation Data(bytes:count:) and trigger an unrecoverable process trap instead of a catchable ProtoDecoder.Error. Any Swift process decoding untrusted protobuf bytes can be crashed without authentication, user interaction, or knowledge of the target schema. This issue is fixed in versions 6.4.1 and 7.0.0-alpha04.

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/24043b6b3a5e5974a978f2745b76d50b31407c1cGitHubgithub.com/square/wire/commit/81ff7f24a6795d9a8be2e03f272b2d979a5d2c7eGitHubgithub.com/square/wire/pull/3616GitHubgithub.com/square/wire/releases/tag/6.4.1GitHubgithub.com/square/wire/releases/tag/7.0.0-alpha04GitHubgithub.com/square/wire/security/advisories/GHSA-86wm-r4c5-2rc9GitHubgithub.com/square/wire/security/advisories/GHSA-86wm-r4c5-2rc9

How CyberStrike helps

Frequently asked questions

What is CVE-2026-61695?

CVE-2026-61695 is a high-severity vulnerability. It was published on September 23, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2026-61695?

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-2026-61695?

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-2026-61695?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-61695 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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