7.5

CVE-2026-101918: jpadilla pyjwt Uncaught Exception

CVSS: 7.5v3.1HighAnalyzed
AliasesGHSA-42vr-xj54-vc7vPYSEC-2026-4141UBUNTU-CVE-2026-101918
Published 28-09-2026Last modified 29-09-2026
Open JSON

Vulnerability summary

CVE-2026-101918 is a high (CVSS 7.5) Uncaught Exception vulnerability in jpadilla pyjwt. EPSS estimates a 0.36% chance of exploitation in the next 30 days, higher than 28% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
40/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (NVD)
EPSS score
0.36%
0%100%
Low · Change unavailable
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github

Advisory lineage

Upstream 0 · Downstream 4 · Related 4
OPENSUSE-SU-2026:11994-1OPENSUSE-SU-2026:22074-1SUSE-SU-2026:24126-1SUSE-SU-2026:24134-1

Timeline

  1. 28-09-2026
    PublishedVulnerability first disclosed.
  2. 29-09-2026
    Last modifiedVulnerability information updated.

Description

PyJWT is a Python implementation of JSON Web Token standards. From 2.0.0a1 until 2.15.0, PyJWT PyJWKClient.get_signing_key_from_jwt is affected because payload parser catches ValueError but not RecursionError. This occurs when an attacker-controlled recursively nested payload reaches json.loads. As a result, documented PyJWT exception handling does not contain the failure. Consequently, an unauthenticated request can raise an exception that may produce an HTTP 500 response. The advisory-defined affected implementation also includes jwt/api_jwt.py, verify_signature=False. This issue is fixed in version 2.15.0.

CVSS metrics

7 scores · 7 sources · 1 version

EPSS trend

Probability

0.36%

Chance of exploitation in the next 30 days

Percentile

28%

Versus all other CVEs

30-day change

Change unavailable

Change unavailable

29-09-202619-10-2026
EPSS score
0.36%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • githubUnverified

    Pyjwt

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Chainguard95 products
  • airflow-2All versions (No fix recorded)
  • airflow-core-2All versions (No fix recorded)
  • authentik-fips-2026.5< 2026.5.7-r7
  • awx< 24.6.1-r67
  • azureml-inference-server-http< 1.5.1-r11
Wolfi11 products
  • datadog-agent-7.77-core-integrationsAll versions (No fix recorded)
  • datadog-agent-7.78-core-integrationsAll versions (No fix recorded)
  • datadog-agent-7.79-core-integrations< 7.79.2-r21
  • datadog-agent-7.80-core-integrationsAll versions (No fix recorded)
  • datadog-agent-7.81-core-integrationsAll versions (No fix recorded)
Debian1 product
  • pyjwtAll versions (No fix recorded) | < 2.15.0-1
Jpadilla1 product
  • pyjwt≥ 2.0.0a1, < 2.15.0
Pyjwt_project1 product
PyPI1 product
  • pyjwt≥ 2.0.0a1, < 2.15.0
Ubuntu1 product
  • pyjwtAll versions (No fix recorded)

7 vendors · 111 products

References

11 links
Show all 11 references