GHSA-cpwx-vrp4-4pq7

Source

https://github.com/advisories/GHSA-cpwx-vrp4-4pq7

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/03/GHSA-cpwx-vrp4-4pq7/GHSA-cpwx-vrp4-4pq7.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-cpwx-vrp4-4pq7

Aliases

CVE-2025-27516

Published

2025-03-05T20:40:14Z

Modified

2025-03-05T22:10:11.248005Z

Severity

5.4 (Medium) CVSS_V4 - CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N CVSS Calculator

Summary

Jinja2 vulnerable to sandbox breakout through attr filter selecting format method

Details

An oversight in how the Jinja sandboxed environment interacts with the |attr filter allows an attacker that controls the content of a template to execute arbitrary Python code.

To exploit the vulnerability, an attacker needs to control the content of a template. Whether that is the case depends on the type of application using Jinja. This vulnerability impacts users of applications which execute untrusted templates.

Jinja's sandbox does catch calls to str.format and ensures they don't escape the sandbox. However, it's possible to use the |attr filter to get a reference to a string's plain format method, bypassing the sandbox. After the fix, the |attr filter no longer bypasses the environment's attribute lookup.

Database specific

{
    "nvd_published_at": "2025-03-05T21:15:20Z",
    "cwe_ids": [
        "CWE-1336"
    ],
    "severity": "MODERATE",
    "github_reviewed": true,
    "github_reviewed_at": "2025-03-05T20:40:14Z"
}

References

Affected packages

PyPI / jinja2

Package

Name: jinja2; View open source insights on deps.dev
Purl: pkg:pypi/jinja2

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

3.1.6

Affected versions

2.*

2.0rc1

2.0

2.1

2.1.1

2.2

2.2.1

2.3

2.3.1

2.4

2.4.1

2.5

2.5.1

2.5.2

2.5.3

2.5.4

2.5.5

2.6

2.7

2.7.1

2.7.2

2.7.3

2.8

2.8.1

2.9

2.9.1

2.9.2

2.9.3

2.9.4

2.9.5

2.9.6

2.10

2.10.1

2.10.2

2.10.3

2.11.0

2.11.1

2.11.2

2.11.3

3.*

3.0.0a1

3.0.0rc1

3.0.0rc2

3.0.0

3.0.1

3.0.2

3.0.3

3.1.0

3.1.1

3.1.2

3.1.3

3.1.4

3.1.5

Database specific

{
    "last_known_affected_version_range": "<= 3.1.5"
}