[Security] [P2] CVE-2025-27516 GHSA-cpwx-vrp4-4pq7 — Jinja2 (qbeast-spark)

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Dependabot Security Alert

Field	Value
GHSA	GHSA-cpwx-vrp4-4pq7
CVE	CVE-2025-27516
Severity	medium
Package	Jinja2 (pip)
Affected version	runtime
Summary	Jinja2 vulnerable to sandbox breakout through attr filter selecting format method
Repository	Qbeast-io/qbeast-spark

Description

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.

Alert link

View on GitHub

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Automatically created by the Vanta/Dependabot → ZenHub sync pipeline
GHSA: GHSA-cpwx-vrp4-4pq7

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The underlying Vanta vulnerability CVE-2025-27516 is no longer reported as open (fixed, dismissed, or deactivated) as of 2026-05-01T07:01:00+00:00 UTC.

Please close this issue once the fix has been verified.