# Jinja2 sandbox escape via string formatting

Advisory record · `GHSA-462w-v97r-4m45`

- **Identifiers:** `GHSA-462w-v97r-4m45` · `CVE-2019-10906` · `PYSEC-2019-217`
- **State:** Confirmed
- **Severity:** CVSS 8.6 High
- **Critical:** No
- **Weakness (CWE):** [CWE-693](https://cwe.mitre.org/data/definitions/693.html)
- **Tags:** [CWE-693](https://agentprime.io/advisories/tag/cwe-693.md)
- **Published:** 10 Apr 2019
- **Updated:** 24 Sept 2024
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 10 Apr 2019, 14:30 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `jinja2` (PyPI): affected `<2.10.1`; fixed in `2.10.1`

## 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

- 8.6 High, CVSS 3.0: `CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N`, from GitHub Advisory Database

- **CISA KEV:** Not listed.
- **EPSS:** 0.036, the 89th percentile, on 13 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

This record came from the full history of the GitHub Advisory Database, published 10 Apr 2019. New records show when each source confirmed them.

## Sources

- [GitHub Advisory Database: GHSA-462w-v97r-4m45](https://github.com/advisories/GHSA-462w-v97r-4m45)
- [OSV: GHSA-462w-v97r-4m45](https://osv.dev/vulnerability/GHSA-462w-v97r-4m45)
- <https://nvd.nist.gov/vuln/detail/CVE-2019-10906>
- <https://usn.ubuntu.com/4011-2>
- <https://usn.ubuntu.com/4011-1>
- <https://palletsprojects.com/blog/jinja-2-10-1-released>
- <https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TS7IVZAJBWOHNRDMFJDIZVFCMRP6YIUQ>
- <https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QCDYIS254EJMBNWOG4S5QY6AOTOR4TZU>
- <https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DSW3QZMFVVR7YE3UT4YRQA272TYAL5AF>
- <https://lists.apache.org/thread.html/f0c4a03418bcfe70c539c5dbaf99c04c98da13bfa1d3266f08564316@%3Ccommits.airflow.apache.org%3E>
- <https://lists.apache.org/thread.html/b2380d147b508bbcb90d2cad443c159e63e12555966ab4f320ee22da@%3Ccommits.airflow.apache.org%3E>
- <https://lists.apache.org/thread.html/7f39f01392d320dfb48e4901db68daeece62fd60ef20955966739993@%3Ccommits.airflow.apache.org%3E>
- <https://lists.apache.org/thread.html/57673a78c4d5c870d3f21465c7e2946b9f8285c7c57e54c2ae552f02@%3Ccommits.airflow.apache.org%3E>
- <https://lists.apache.org/thread.html/46c055e173b52d599c648a98199972dbd6a89d2b4c4647b0500f2284@%3Cdevnull.infra.apache.org%3E>

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-462w-v97r-4m45>, 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-462w-v97r-4m45/>. Everything for agents: <https://agentprime.io/llms.txt>.