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Fencer Vulns
medium 5.3

CVE-2024-33664 json

python-jose denial of service via compressed JWE content

published 2024-04-25 2 y ago modified 2026-06-17 4 mo ago also GHSA-cjwg-qfpm-7377 , PYSEC-2024-233 , EUVD-2024-1187

cvss
5.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.8%
EPSS 0.8% chance of exploitation in 30 days, percentile 56%
public exploits
0
none known

Summary

python-jose through 3.3.0 allows attackers to cause a denial of service (resource consumption) during a decode via a crafted JSON Web Encryption (JWE) token with a high compression ratio, aka a "JWT bomb." This is similar to CVE-2024-21319.

Patch / fix

  • pypi python-jose 3.4.0
  • python-cryptography openSUSE Tumbleweed 3.3.0-3.1
  • python-python-jose Package Hub 15 SP5, openSUSE Leap 15.5 3.0.1-bp155.3.6.1

opensuse advisories openSUSE-SU-2024:13928-1openSUSE-SU-2024:0149-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2024-33664 updated

python-jose: allows attackers to cause a denial of service

  • Red Hat Ansible Automation Platform 2 python-jose, automation-controller
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
yes
Technical impact
partial
Assessed
2 y ago

Exploit prediction

0.78% chance of exploitation in the next 30 days, higher than 56% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/mpdavis/python-jose/issues/344 referenced PoC, tagged "exploit" by a source, unverified
  • vicarius.io https://www.vicarius.io/vsociety/posts/jwt-bomb-in-python-jose-cve-2024-33664 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CISA ADP 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CNA 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
GitHub 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Affected packages

ecosystem package affected fixed in
pypi python-jose
<3.4.0
3.4.0

Affected products

  • python-jose_project python-jose

Classification

Weakness
  • CWE-400 Uncontrolled Resource Consumption

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.