3.7

CVE-2026-48524: jpadilla pyjwt Improper Cleanup on Thrown Exception

CVSS: 3.7v3.1LowAnalyzed
AliasesGHSA-fhv5-28vv-h8m8PYSEC-2026-177UBUNTU-CVE-2026-48524
Published 28-05-2026Last modified 28-05-2026
Open JSON

Vulnerability summary

CVE-2026-48524 is a low (CVSS 3.7) Improper Cleanup on Thrown Exception vulnerability in jpadilla pyjwt. EPSS estimates a 0.32% chance of exploitation in the next 30 days, higher than 23.6% of scored vulnerabilities.

Overall risk
15/100
0100
Low · default modelHow is this calculated?
CVSS score
3.7/10
010
Low · v3.1 (CVE.org)
EPSS score
0.32%
0%100%
Low · -0.03 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 8 · Related 9
OPENSUSE-SU-2026:11024-1OPENSUSE-SU-2026:21095-1SUSE-SU-2026:22138-1SUSE-SU-2026:22170-1SUSE-SU-2026:22220-1SUSE-SU-2026:22238-1

Timeline

  1. 28-05-2026
    PublishedVulnerability first disclosed.
  2. 28-05-2026
    Last modifiedVulnerability information updated.

Description

PyJWT is a JSON Web Token implementation in Python. Prior to 2.13.0, PyJWKClient.get_signing_key() forces a fresh HTTP request to the JWKS endpoint for every JWT with an unknown kid value, with no rate limiting. Since kid comes from the unverified token header, an attacker can trigger unlimited outbound requests. The vulnerability surfaces only when a JWKS fetch fails; an attacker can attempt to provoke that with sustained unknown-kid traffic, but the outcome depends on upstream JWKS-endpoint behavior (rate limiting, transient errors) which is beyond the attacker's control. This vulnerability is fixed in 2.13.0.

CVSS metrics

7 scores · 7 sources · 1 version

EPSS trend

Probability

0.32%

Chance of exploitation in the next 30 days

Percentile

24%

Versus all other CVEs

30-day change

-0.03 pp

From 0.36% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.32%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Chainguard65 products
  • airflow-2< 2.11.2-r25
  • airflow-core-2< 2.11.2-r10
  • airflow-core-3< 3.2.2-r5
  • airflow-postgres-fips-3< 3.2.2-r3
  • awx< 24.6.1-r41
Wolfi17 products
  • datadog-agent-7.72-core-integrationsAll versions (No fix recorded)
  • datadog-agent-7.73-core-integrations< 7.73.3-r23
  • datadog-agent-7.74-core-integrations< 7.74.1-r24
  • datadog-agent-7.75-core-integrationsAll versions (No fix recorded)
  • datadog-agent-7.76< 7.76.3-r41
Debian1 product
  • pyjwtAll versions (No fix recorded) | < 2.13.0-1
Jpadilla1 product
Pyjwt_project1 product
PyPI1 product
  • pyjwt≥ 2.0.0, < 2.13.0 | < 2.13.0
Ubuntu1 product
  • pyjwt< 2.7.0-1ubuntu0.2 | All versions (No fix recorded) | < 2.10.1-4ubuntu1.1

7 vendors · 87 products

References

10 links