Security Digest · Vulnerability record
CVE-2024-33663: python-jose algorithm confusion with OpenSSH ECDSA keys
python-jose through 3.3.0 has algorithm confusion with OpenSSH ECDSA keys and other key formats.
CVSS 9.3 Critical EPSS 0.3% · p22
Should you act?
Critical and remotely reachable
No known exploitation yet, but it is network-reachable without credentials. This signal is computed from CISA KEV, EPSS and CVSS data; it is not an editorial verdict.
- Not in CISA KEV, but CISA’s SSVC assessment records a public proof-of-concept, so attack code exists.
- EPSS 0.3%, percentile 22: FIRST’s model estimates a 0.3% chance of exploitation activity in the next 30 days, higher than 22% of all scored CVEs (low). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Only applies if your dependency tree includes
python-jose(PyPI) < 3.4.0, fixed in 3.4.0. Check your lockfile, including transitive dependencies.
What it is
python-jose through 3.3.0 has algorithm confusion with OpenSSH ECDSA keys and other key formats. This is similar to CVE-2022-29217.
From the GitHub advisory
python-jose through 3.3.0 has algorithm confusion with OpenSSH ECDSA keys and other key formats. This is similar to CVE-2022-29217.
Weakness type: CWE-327.
Product: python-jose (PyPI) · Assigned by: mitre · Published: 2024-04-25
Affected and fixed versions
| Ecosystem | Package | Vulnerable | First fixed |
|---|---|---|---|
| PyPI | python-jose | < 3.4.0 | 3.4.0 |
| Vendor | Product | Affected versions (per CVE record) |
|---|---|---|
| n/a | n/a | see vendor advisory |
Severity scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADP | 3.1 | 6.5 Medium | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N |
| GitHub | 4.0 | 9.3 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N |
- Attack vector: network (remotely reachable)
- Attack complexity: low
- Attack requirements: none
- Privileges required: none (no login)
- User interaction: none
CVSS measures how bad a flaw is if exploited, not how likely exploitation is. Read it next to the exploitation data below.
Exploitation and urgency
- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation poc, automatable no, technical impact partial.
- FIRST EPSS (model of 2026-10-21): 0.31% probability of exploitation activity in the next 30 days; percentile 22.
Timeline
- — CVE record published by mitre
- — GitHub-reviewed advisory GHSA-6c5p-j8vq-pqhj published (critical)
- — CVE record last updated
Sources and references
Original sources first. Version and fix details should always be confirmed against the vendor or project advisory.
Vulnerability records
- GitHub Advisory GHSA-6c5p-j8vq-pqhj github.com
- CVE.org record CVE-2024-33663 cve.org
- NVD entry CVE-2024-33663 nvd.nist.gov
Other references from the CVE record and advisory
- github.com github.com
- vicarius.io vicarius.io
- github.com github.com