CVE-2026-45799: Wire: skipGroup() missing negative-length check allows 10-byte payload to crash any Wire-decoding service
(updated )
Wire’s protobuf group-skipping logic did not reject negative lengths before skipping a
length-delimited field inside a group. A crafted protobuf payload could cause Wire to throw an
unchecked runtime exception during decoding instead of the documented IOException /
ProtocolException failure path.
This can crash services that decode untrusted protobuf payloads and only handle Wire’s documented checked decoding failures.
References
- github.com/advisories/GHSA-7xpr-hc2w-34m9
- github.com/square/wire/commit/47d5b0dba53935d5332cd41a80a353b3fc90e7b0
- github.com/square/wire/commit/e4e56fab38a547d9625f05c97f1d8f0bcc3a5773
- github.com/square/wire/pull/3595
- github.com/square/wire/pull/3597
- github.com/square/wire/releases/tag/6.3.0
- github.com/square/wire/releases/tag/7.0.0-alpha03
- github.com/square/wire/security/advisories/GHSA-7xpr-hc2w-34m9
- nvd.nist.gov/vuln/detail/CVE-2026-45799
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