Wire: skipGroup() missing negative-length check allows 10-byte payload to crash any Wire-decoding service

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

• CISA KEV Not listed.
• EPSS 0.0073, the 54th percentile, on 6 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

1. 31 Oct 2026, 14:19 UTC First seen by agentprime
2. 31 Oct 2026, 14:19 UTC Confirmed by OSV

Sources

• GitHub Advisory Database: GHSA-7xpr-hc2w-34m9
• OSV: GHSA-7xpr-hc2w-34m9
• github.com/square/wire/security/advisories/GHSA-7xpr-hc2w-34m9
• nvd.nist.gov/vuln/detail/CVE-2026-45799
• github.com/square/wire/pull/3595
• github.com/square/wire/pull/3597
• github.com/square/wire/commit/47d5b0dba53935d5332cd41a80a353b3fc90e7b0
• github.com/square/wire/commit/e4e56fab38a547d9625f05c97f1d8f0bcc3a5773
• github.com/square/wire
• github.com/square/wire/releases/tag/6.3.0
• github.com/square/wire/releases/tag/7.0.0-alpha03

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.