CVE Explorer

CVE-2026-48524

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 be

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:3ca4788a142538c889363f82bb3823e10df0226df9556c9bdd7a45abe4a0d4eb

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-755","description":"CWE-755: Improper Handling of Exceptional Conditions","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:4be36615e5722ab766cdd23ad9e298460fb55a12130c839e648642d5b80ca8d9 · sha256:005403df6a570ac1… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-460","description":"CWE-460: Improper Cleanup on Thrown Exception","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:4be36615e5722ab766cdd23ad9e298460fb55a12130c839e648642d5b80ca8d9 · sha256:005403df6a570ac1… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion

{"product":"pyjwt","vendor":"jpadilla","versions":[{"status":"affected","version":"< 2.13.0"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:4be36615e5722ab766cdd23ad9e298460fb55a12130c839e648642d5b80ca8d9 · sha256:005403df6a570ac1… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":3.7,"baseSeverity":"LOW","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","version":"3.1"},"metric_type":"cvssV3_1"}

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:4be36615e5722ab766cdd23ad9e298460fb55a12130c839e648642d5b80ca8d9 · sha256:005403df6a570ac1… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

2 source assertions

{"cweId":"CWE-755","description":"CWE-755: Improper Handling of Exceptional Conditions","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:4be36615e5722ab766cdd23ad9e298460fb55a12130c839e648642d5b80ca8d9 · sha256:005403df6a570ac1… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-460","description":"CWE-460: Improper Cleanup on Thrown Exception","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:4be36615e5722ab766cdd23ad9e298460fb55a12130c839e648642d5b80ca8d9 · sha256:005403df6a570ac1… · /containers/cna/problemTypes/0/descriptions/0

Source references

1 source assertion

{"name":"https://github.com/jpadilla/pyjwt/security/advisories/GHSA-fhv5-28vv-h8m8","tags":["x_refsource_CONFIRM"],"url":"https://github.com/jpadilla/pyjwt/security/advisories/GHSA-fhv5-28vv-h8m8"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:4be36615e5722ab766cdd23ad9e298460fb55a12130c839e648642d5b80ca8d9 · sha256:005403df6a570ac1… · /containers/cna/references/0

Attribution and limitations

CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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