CVE-2022-39227: python-jwt is a module for generating and verifying JSON Web Tokens

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CRITICAL 9.1REMOTEUPGRADE

CVE-2022-39227 is a critical-severity flaw (CVSS 9.1) affecting python-jwt. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

python-jwt is a module for generating and verifying JSON Web Tokens. Versions prior to 3.3.4 are subject to Authentication Bypass by Spoofing, resulting in identity spoofing, session hijacking or authentication bypass. An attacker who obtains a JWT can arbitrarily forge its contents without knowing the secret key. Depending on the application, this may for example enable the attacker to spoof other user's identities, hijack their sessions, or byp

Why this priority

Critical severity
EPSS top 7%: very likely to be exploited
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.1 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	5.3% (top 7%)
CISA exploited list	No
Weakness	CWE-290
Published	2022-09-23
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: python-jwt project

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

Am I affected?

Timeline

2022-09-23 07:15 UTCPublished CVE record published
2026-06-17 04:57 UTCUpdated Record last modified

python-jwt project python-jwt UPGRADE

Affected: >= 3.0.0 and < 3.3.4

Fixed in: 3.3.4

Safe to downgrade to: a release before 3.0.0

1. Check installed version

apt-cache policy python-jwt || rpm -q python-jwt || python-jwt --version

2. UPGRADE to 3.3.4 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade python-jwt

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade python-jwt

Note

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

3. If no update is available yet, DOWNGRADE to a release before 3.0.0 (Debian / Ubuntu)

apt-cache madison python-jwt sudo apt install python-jwt=<VERSION_BEFORE_3.0.0> sudo apt-mark hold python-jwt

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list python-jwt sudo dnf downgrade python-jwt-<VERSION_BEFORE_3.0.0> sudo dnf versionlock add python-jwt

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2022-39227?

python-jwt: upgrade to 3.3.4. Exact commands for each OS are on this page.

Is CVE-2022-39227 being exploited?

CVE-2022-39227 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-2022-39227 affect?

CVE-2022-39227 affects python-jwt. Severity is critical (CVSS 9.1). python-jwt is a module for generating and verifying JSON Web Tokens. Versions prior to 3.3.4 are subject to Authentication Bypass by Spoofing, resulting in identity spoofing, session hijacking or authentication bypass. An attacker who obtai

How urgent is CVE-2022-39227?

Priority 60/100. Critical severity; EPSS top 7%: very likely to be exploited; Remotely exploitable, no login, no user action

Software pages

Python vulnerabilities

References

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