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

Advisory record · `GHSA-7xpr-hc2w-34m9`

- **Identifiers:** `GHSA-7xpr-hc2w-34m9` · `CVE-2026-45799`
- **State:** Confirmed
- **Severity:** CVSS 7.5 High
- **Critical:** No
- **Weakness (CWE):** [CWE-129](https://cwe.mitre.org/data/definitions/129.html)
- **Tags:** [CWE-129](https://agentprime.io/advisories/tag/cwe-129.md)
- **Published:** 19 May 2026
- **Updated:** 5 Aug 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 19 May 2026, 19:54 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `com.squareup.wire:wire-runtime-jvm` (Maven): affected `<6.3.0 || >=7.0.0-alpha01, <7.0.0-alpha03`; fixed in `6.3.0`, `7.0.0-alpha03`
- `com.squareup.wire:wire-runtime` (Maven): affected `<6.3.0 || >=7.0.0-alpha01, <7.0.0-alpha03`; fixed in `6.3.0`, `7.0.0-alpha03`

## 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

- 7.5 High, CVSS 3.1: `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`, from CNA (GitHub_M)

- **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

- 31 Oct 2026, 14:19 UTC: First seen by agentprime
- 31 Oct 2026, 14:19 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-7xpr-hc2w-34m9)

## Sources

- [GitHub Advisory Database: GHSA-7xpr-hc2w-34m9](https://github.com/advisories/GHSA-7xpr-hc2w-34m9)
- [OSV: GHSA-7xpr-hc2w-34m9](https://osv.dev/vulnerability/GHSA-7xpr-hc2w-34m9)
- <https://github.com/square/wire/security/advisories/GHSA-7xpr-hc2w-34m9>
- <https://nvd.nist.gov/vuln/detail/CVE-2026-45799>
- <https://github.com/square/wire/pull/3595>
- <https://github.com/square/wire/pull/3597>
- <https://github.com/square/wire/commit/47d5b0dba53935d5332cd41a80a353b3fc90e7b0>
- <https://github.com/square/wire/commit/e4e56fab38a547d9625f05c97f1d8f0bcc3a5773>
- <https://github.com/square/wire>
- <https://github.com/square/wire/releases/tag/6.3.0>
- <https://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.

## Check whether this affects you

A Match means an installed version is in the affected range above. Most don’t affect the app; agentprime hasn’t analysed this one yet.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), ask your agent to check the project: `check_lockfile` sends a lockfile, `check_packages` a list of installed packages, and both return the Matches and the upgrades that clear them. `get_advisory` returns this record. Setup: <https://agentprime.io/mcp.md>
- In a browser: <https://agentprime.io/check/> reads your lockfile in the browser, never uploading it.
- Whether it touches your code, with file and line: the Claude Code plugin, <https://agentprime.io/plugin.md>
- As JSON: <https://api.agentprime.io/v1/advisories/GHSA-7xpr-hc2w-34m9>, or `POST https://api.agentprime.io/v1/match` with your packages (<https://agentprime.io/api.md>)

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The web page: <https://agentprime.io/advisories/GHSA-7xpr-hc2w-34m9/>. Everything for agents: <https://agentprime.io/llms.txt>.