CVE-2024-29370: In python-jose 3.3.0 (specifically jwe.decrypt), a vulnerability allows an attacker to cause a Denial-of-Servi

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MEDIUM 5.3REMOTEDOWNGRADE

CVE-2024-29370 is a medium-severity flaw (CVSS 5.3) affecting python-jose. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In python-jose 3.3.0 (specifically jwe.decrypt), a vulnerability allows an attacker to cause a Denial-of-Service (DoS) condition by crafting a malicious JSON Web Encryption (JWE) token with an exceptionally high compression ratio. When this token is processed by the server, it results in significant memory allocation and processing time during decompression.

Why this priority

Public exploit reference
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.2% (top 92%)
CISA exploited list	No
Weakness	CWE-409
Published	2025-12-17
Last modified	2026-10-27

Publisher (CNA): MITRE · Vendor: python-jose project

Last updated 2026-10-27 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-12-17 16:16 UTCPublished CVE record published
2026-10-27 18:10 UTCUpdated Record last modified

python-jose project python-jose DOWNGRADE

Affected: 3.3.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.3.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 3.3.0 (Debian / Ubuntu)

apt-cache madison python-jose sudo apt install python-jose=<VERSION_BEFORE_3.3.0> sudo apt-mark hold python-jose

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list python-jose sudo dnf downgrade python-jose-<VERSION_BEFORE_3.3.0> sudo dnf versionlock add python-jose

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-2024-29370?

python-jose: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2024-29370 being exploited?

CVE-2024-29370 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-2024-29370 affect?

CVE-2024-29370 affects python-jose. Severity is medium (CVSS 5.3). In python-jose 3.3.0 (specifically jwe.decrypt), a vulnerability allows an attacker to cause a Denial-of-Service (DoS) condition by crafting a malicious JSON Web Encryption (JWE) token with an exceptionally high compression ratio. When this

How urgent is CVE-2024-29370?

Priority 31/100. Public exploit reference; Remotely exploitable, no login, no user action

Software pages

Python vulnerabilities

References

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