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CVE-2026-61695 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:7.5 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/square/wire/commit/24043b6b3a5e5974a978f2745b76d50b31407c1c	[email protected]
https://github.com/square/wire/commit/81ff7f24a6795d9a8be2e03f272b2d979a5d2c7e	[email protected]
https://github.com/square/wire/pull/3616	[email protected]
https://github.com/square/wire/releases/tag/6.4.1	[email protected]
https://github.com/square/wire/releases/tag/7.0.0-alpha04	[email protected]
https://github.com/square/wire/security/advisories/GHSA-86wm-r4c5-2rc9	[email protected]

see all 6 references

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-129	Improper Validation of Array Index	[email protected]

Affected Products

No affected product data is available for this CVE.

Change History

1 change record found show changes