CVE-2025-27516: Jinja is an extensible templating engine

Q: How do I fix CVE-2025-27516?

jinja: upgrade to 3.1.6; debian linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Q: Is CVE-2025-27516 being exploited?

CVE-2025-27516 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2025-27516 affect?

CVE-2025-27516 affects jinja, debian linux. Severity is high (CVSS 8.8). Jinja is an extensible templating engine. Prior to 3.1.6, 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 ex

Q: How urgent is CVE-2025-27516?

Priority 47/100. High severity; On your watchlist

This month

HIGH 8.8WATCHLISTUPGRADEMITIGATE

CVE-2025-27516 is a high-severity flaw (CVSS 8.8) affecting jinja, debian linux. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Jinja is an extensible templating engine. Prior to 3.1.6, 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 e

Why this priority

High severity
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.5% (top 57%)
CISA exploited list	No
Weakness	CWE-1336
Published	2025-03-05
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: debian · palletsprojects

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-03-05 21:15 UTCPublished CVE record published
2026-06-17 09:03 UTCUpdated Record last modified

palletsprojects jinja UPGRADE

Affected: < 3.1.6

Fixed in: 3.1.6

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy jinja || rpm -q jinja || jinja --version

2. UPGRADE to 3.1.6 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade jinja

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade jinja

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

debian debian linux MITIGATE

Affected: 11.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 11.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-27516?

jinja: upgrade to 3.1.6; debian linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-27516 being exploited?

CVE-2025-27516 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-27516 affect?

CVE-2025-27516 affects jinja, debian linux. Severity is high (CVSS 8.8). Jinja is an extensible templating engine. Prior to 3.1.6, 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 ex

How urgent is CVE-2025-27516?

Priority 47/100. High severity; On your watchlist

Software pages

Python vulnerabilities · Debian vulnerabilities

Related CVEs

CVE-2024-56326 HIGH 7.8 UPGRADE Jinja is an extensible templating engine
CVE-2024-56201 HIGH 8.8 UPGRADE Jinja is an extensible templating engine
CVE-2024-34064 MEDIUM 5.4 UPGRADE MITIGATE Jinja is an extensible templating engine
CVE-2024-22195 MEDIUM 5.4 UPGRADE Jinja is an extensible templating engine

References

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