Low severity3.7NVD Advisory· Published May 28, 2026· Updated Jun 1, 2026
CVE-2026-48524
CVE-2026-48524
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
pyjwtPyPI | < 2.13.0 | 2.13.0 |
Affected products
56- osv-coords53 versionspkg:apk/chainguard/airflow-core-3pkg:apk/chainguard/awxpkg:apk/chainguard/datadog-agent-7.76-core-integrationspkg:apk/chainguard/datadog-agent-7.77-core-integrationspkg:apk/chainguard/datadog-agent-7.78-core-integrationspkg:apk/chainguard/datadog-agent-7.79-core-integrationspkg:apk/chainguard/datadog-agent-fips-7.76-core-integrationspkg:apk/chainguard/datadog-agent-fips-7.77-core-integrationspkg:apk/chainguard/datadog-agent-fips-7.78-core-integrationspkg:apk/chainguard/datadog-agent-fips-7.79-core-integrationspkg:apk/chainguard/kserve-storage-controllerpkg:apk/chainguard/litellmpkg:apk/chainguard/metaflow-service-fipspkg:apk/chainguard/netboxpkg:apk/chainguard/netbox-fipspkg:apk/chainguard/openstack-glance-2025.1pkg:apk/chainguard/openstack-glance-2025.1-fipspkg:apk/chainguard/openstack-glance-2025.2pkg:apk/chainguard/openstack-glance-2025.2-fipspkg:apk/chainguard/openstack-glance-2026.1pkg:apk/chainguard/openstack-glance-2026.1-fipspkg:apk/chainguard/openstack-horizon-2025.1pkg:apk/chainguard/openstack-horizon-2025.1-fipspkg:apk/chainguard/openstack-horizon-2025.2-fipspkg:apk/chainguard/openstack-horizon-2026.1-fipspkg:apk/chainguard/openstack-keystone-2025.1pkg:apk/chainguard/openstack-keystone-2025.1-fipspkg:apk/chainguard/openstack-keystone-2025.2pkg:apk/chainguard/openstack-keystone-2025.2-fipspkg:apk/chainguard/openstack-keystone-2026.1pkg:apk/chainguard/openstack-keystone-2026.1-fipspkg:apk/chainguard/openstack-placement-2025.1pkg:apk/chainguard/openstack-placement-2025.1-fipspkg:apk/chainguard/openstack-placement-2025.2pkg:apk/chainguard/openstack-placement-2025.2-fipspkg:apk/chainguard/openstack-placement-2026.1pkg:apk/chainguard/openstack-placement-2026.1-fipspkg:apk/chainguard/superset-5.0pkg:apk/chainguard/superset-6.1pkg:apk/chainguard/superset-fips-6.1pkg:apk/chainguard/wazuh-manager-framework-fipspkg:apk/wolfi/datadog-agent-7.76-core-integrationspkg:apk/wolfi/datadog-agent-7.77-core-integrationspkg:apk/wolfi/datadog-agent-7.78-core-integrationspkg:apk/wolfi/datadog-agent-7.79-core-integrationspkg:apk/wolfi/kserve-storage-controllerpkg:apk/wolfi/superset-5.0pkg:apk/wolfi/superset-6.1pkg:rpm/opensuse/python-PyJWT&distro=openSUSE%20Tumbleweedpkg:rpm/suse/python-PyJWT&distro=SUSE%20Linux%20Enterprise%20Server%2016.0pkg:rpm/suse/python-PyJWT&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0pkg:rpm/suse/python-PyJWT&distro=SUSE%20Linux%20Micro%206.1pkg:rpm/suse/python-PyJWT&distro=SUSE%20Linux%20Micro%206.2
< 3.2.2-r5+ 52 more
- (no CPE)range: < 3.2.2-r5
- (no CPE)range: < 24.6.1-r41
- (no CPE)range: < 7.76.3-r26
- (no CPE)range: < 7.77.3-r16
- (no CPE)range: < 7.78.4-r10
- (no CPE)range: < 7.79.2-r6
- (no CPE)range: < 7.76.3-r24
- (no CPE)range: < 7.77.3-r17
- (no CPE)range: < 7.78.4-r8
- (no CPE)range: < 7.79.2-r2
- (no CPE)range: < 0.19.0-r2
- (no CPE)range: < 1.89.0-r4
- (no CPE)range: < 2.5.0-r5
- (no CPE)range: < 4.6.3-r2
- (no CPE)range: < 4.6.3-r2
- (no CPE)range: < 30.2.0_git20260616-r1
- (no CPE)range: < 30.2.0_git20260511-r5
- (no CPE)range: < 31.1.0_git20260617-r1
- (no CPE)range: < 31.1.0_git20260617-r0
- (no CPE)range: < 32.0.0_git20260617-r1
- (no CPE)range: < 32.0.0_git20260617-r1
- (no CPE)range: < 25.3.2_git20260617-r1
- (no CPE)range: < 25.3.2_git20260617-r0
- (no CPE)range: < 25.5.2_git20260617-r1
- (no CPE)range: < 25.7.3_git20260611-r3
- (no CPE)range: < 27.0.1_git20260618-r4
- (no CPE)range: < 27.0.1_git20260618-r2
- (no CPE)range: < 28.0.1_git20260618-r3
- (no CPE)range: < 28.0.1_git20260616-r1
- (no CPE)range: < 29.0.1_git20260616-r4
- (no CPE)range: < 29.0.1_git20260603-r6
- (no CPE)range: < 13.0.0_git20260617-r2
- (no CPE)range: < 13.0.0_git20260617-r1
- (no CPE)range: < 14.0.0_git20260617-r2
- (no CPE)range: < 14.0.0_git20260309-r1
- (no CPE)range: < 15.0.0_git20260617-r2
- (no CPE)range: < 15.0.0_git20260311-r1
- (no CPE)range: < 5.0.0-r26
- (no CPE)range: < 6.1.0-r2
- (no CPE)range: < 6.1.0-r1
- (no CPE)range: < 4.14.5-r5
- (no CPE)range: < 7.76.3-r26
- (no CPE)range: < 7.77.3-r16
- (no CPE)range: < 7.78.4-r10
- (no CPE)range: < 7.79.2-r6
- (no CPE)range: < 0.19.0-r2
- (no CPE)range: < 5.0.0-r26
- (no CPE)range: < 6.1.0-r2
- (no CPE)range: < 2.13.0-1.1
- (no CPE)range: < 2.12.1-160000.2.1
- (no CPE)range: < 2.12.1-160000.2.1
- (no CPE)range: < 2.12.1-slfo.1.1_2.1
- (no CPE)range: < 2.12.1-160000.2.1
Patches
Vulnerability mechanics
References
4- github.com/advisories/GHSA-fhv5-28vv-h8m8ghsaADVISORY
- github.com/jpadilla/pyjwt/security/advisories/GHSA-fhv5-28vv-h8m8nvdMitigationVendor AdvisoryWEB
- nvd.nist.gov/vuln/detail/CVE-2026-48524ghsaADVISORY
- github.com/pypa/advisory-database/tree/main/vulns/pyjwt/PYSEC-2026-177.yamlghsaWEB
News mentions
0No linked articles in our index yet.