CVE-2024-34064: Jinja is an extensible templating engine

Q: How do I fix CVE-2024-34064?

jinja: upgrade to 3.1.4; fedora: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Q: Is CVE-2024-34064 being exploited?

CVE-2024-34064 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-2024-34064 affect?

CVE-2024-34064 affects jinja, fedora. Severity is medium (CVSS 5.4). Jinja is an extensible templating engine. The `xmlattr` filter in affected versions of Jinja accepts keys containing non-attribute characters. XML/HTML attributes cannot contain spaces, `/`, `>`, or `=`, as each would then be interpreted as

Routine

MEDIUM 5.4UPGRADEMITIGATE

CVE-2024-34064 is a medium-severity flaw (CVSS 5.4) affecting jinja, fedora. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Jinja is an extensible templating engine. The `xmlattr` filter in affected versions of Jinja accepts keys containing non-attribute characters. XML/HTML attributes cannot contain spaces, `/`, `>`, or `=`, as each would then be interpreted as starting a separate attribute. If an application accepts keys (as opposed to only values) as user input, and renders these in pages that other users see as well, an attacker could use this to inject other attr

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	5.4 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	1.0% (top 38%)
CISA exploited list	No
Weakness	CWE-79
Published	2024-05-06
Last modified	2026-06-17

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

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

Am I affected?

Timeline

2024-05-06 15:15 UTCPublished CVE record published
2026-06-17 07:32 UTCUpdated Record last modified

palletsprojects jinja UPGRADE

Affected: < 3.1.4

Fixed in: 3.1.4

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 3.1.4 (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.

fedoraproject fedora MITIGATE

Affected: 39 · 40

Fixed in: no fixed release known

Safe to downgrade to: a release before 39

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-2024-34064?

jinja: upgrade to 3.1.4; fedora: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2024-34064 being exploited?

CVE-2024-34064 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-2024-34064 affect?

CVE-2024-34064 affects jinja, fedora. Severity is medium (CVSS 5.4). Jinja is an extensible templating engine. The `xmlattr` filter in affected versions of Jinja accepts keys containing non-attribute characters. XML/HTML attributes cannot contain spaces, `/`, `>`, or `=`, as each would then be interpreted as

How urgent is CVE-2024-34064?

Priority 34/100. No elevated risk signals yet.

Related CVEs

CVE-2025-27516 HIGH 8.8 UPGRADE MITIGATE Jinja is an extensible templating engine
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-2024-22195 MEDIUM 5.4 UPGRADE Jinja is an extensible templating engine

References

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