# Array size is not checked in sized-chunks

Advisory record · `GHSA-mp6f-p9gp-vpj9`

- **Identifiers:** `GHSA-mp6f-p9gp-vpj9` · `CVE-2020-25791` · `CVE-2020-25792` · `CVE-2020-25793` · `CVE-2020-25794` · `CVE-2020-25795` · `CVE-2020-25796` · `GHSA-64gv-qg2v-vxv6` · `GHSA-9p9m-9xww-qjcx` · `GHSA-fqpx-cq8x-9wp4` · `GHSA-rfgg-vccr-m46m` · `GHSA-x54v-qxxr-93qc` · `RUSTSEC-2020-0041`
- **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:** 25 Aug 2021
- **Updated:** 22 Apr 2024
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 25 Aug 2021, 20:46 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `sized-chunks` (crates.io): affected `<0.6.3`; fixed in `0.6.3`

## Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

> The sized-chunks crate for Rust, versions before 0.6.3, does not check the array size when a Chunk is constructed with pair(). The source gives few details on how an attacker would reach this or what impact it has. Upgrade sized-chunks to version 0.6.3 or later.

Written 8 Nov 2026.

## 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 GitHub Advisory Database

- **CISA KEV:** Not listed.
- **EPSS:** 0.029, the 87th percentile, on 10 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 31 Oct 2026, 15:20 UTC: First seen by agentprime
- 31 Oct 2026, 15:20 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-mp6f-p9gp-vpj9)

## Sources

- [GitHub Advisory Database: GHSA-mp6f-p9gp-vpj9](https://github.com/advisories/GHSA-mp6f-p9gp-vpj9)
- [OSV: GHSA-mp6f-p9gp-vpj9](https://osv.dev/vulnerability/GHSA-mp6f-p9gp-vpj9)
- <https://nvd.nist.gov/vuln/detail/CVE-2020-25792>
- <https://github.com/bodil/sized-chunks/issues/11>
- <https://github.com/bodil/sized-chunks/commit/3ae48bd463c1af41c24b96b84079946f51f51e3c>
- <https://github.com/bodil/sized-chunks/commit/99e593c3037438db478256a1f3101371a69cbd3f>
- <https://github.com/bodil/sized-chunks>
- <https://rustsec.org/advisories/RUSTSEC-2020-0041.html>

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-mp6f-p9gp-vpj9>, 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-mp6f-p9gp-vpj9/>. Everything for agents: <https://agentprime.io/llms.txt>.