# Filesystem sandbox escape when paths or symlinks contain trailing slashes

Advisory record · `GHSA-vqjp-4c8c-hfgg`

- **Identifiers:** `GHSA-vqjp-4c8c-hfgg` · `CVE-2026-115392` · `RUSTSEC-2026-0269`
- **State:** Confirmed
- **Severity:** CVSS 8.8 High
- **Critical:** No
- **Weakness (CWE):** [CWE-61](https://cwe.mitre.org/data/definitions/61.html)
- **Tags:** [CWE-61](https://agentprime.io/advisories/tag/cwe-61.md)
- **Published:** 20 Aug 2026
- **Updated:** 24 Oct 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 20 Aug 2026, 12:00 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `wasmtime` (crates.io): affected `>=0.0.0-0, <24.0.13 || >=25.0.0, <36.0.14 || >=37.0.0, <46.0.3 || >=47.0.0, <47.0.4`; fixed in `24.0.13`, `36.0.14`, `46.0.3`, `47.0.4`

## Machine-written summary

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

> The wasmtime crate is affected in versions before 24.0.13, from 25.0.0 before 36.0.14, from 37.0.0 before 46.0.3, and from 47.0.0 before 47.0.4. The source gives few details beyond a filesystem sandbox escape when paths or symlinks contain trailing slashes, which suggests a guest program could reach files outside its sandbox. Upgrade to 24.0.13, 36.0.14, 46.0.3, or 47.0.4, matching your release line.

Written 3 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

- 8.8 High, CVSS 4.0: `CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:H/VI:H/VA:L/SC:H/SI:H/SA:L`, from CNA (VulnCheck)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0024, the 15th percentile, on 6 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 31 Oct 2026, 14:24 UTC: First seen by agentprime
- 31 Oct 2026, 14:24 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/RUSTSEC-2026-0269)

## Sources

- [GitHub Advisory Database: GHSA-vqjp-4c8c-hfgg](https://github.com/advisories/GHSA-vqjp-4c8c-hfgg)
- [OSV: GHSA-vqjp-4c8c-hfgg](https://osv.dev/vulnerability/GHSA-vqjp-4c8c-hfgg)
- <https://crates.io/crates/wasmtime>
- <https://rustsec.org/advisories/RUSTSEC-2026-0269.html>
- <https://github.com/bytecodealliance/wasmtime/pull/14182>

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-vqjp-4c8c-hfgg>, 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-vqjp-4c8c-hfgg/>. Everything for agents: <https://agentprime.io/llms.txt>.