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CVE-2026-48522

PyJWT is a JSON Web Token implementation in Python. Prior to 2.13.0, PyJWKClient passes its uri argument directly to urllib.request.urlopen() which uses Python stdlib's default OpenerDirector registering HTTPHandler, HTTPSHandler, FTPHandler, FileHandler, and DataHandler. There is currently no documented option to restrict which schemes PyJWKClient will fetch. If an application's jku URL ingestion path accepts attacker-influenced URLs (e.g., from JWT header, configuration file, OAuth flow parame
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:4560bac6381d89b1ae2afde35a71151e057aadb6ed1434d6f8b9a14ab800ba1f
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-918","description":"CWE-918: Server-Side Request Forgery (SSRF)","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:c7d8ce63d2975d76e727094050df47d0879e133b83d6635986404417a2caf504 · sha256:6f17e58f2ed4e352… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-441","description":"CWE-441: Unintended Proxy or Intermediary ('Confused Deputy')","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:c7d8ce63d2975d76e727094050df47d0879e133b83d6635986404417a2caf504 · sha256:6f17e58f2ed4e352… · /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:c7d8ce63d2975d76e727094050df47d0879e133b83d6635986404417a2caf504 · sha256:6f17e58f2ed4e352… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":4.2,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:c7d8ce63d2975d76e727094050df47d0879e133b83d6635986404417a2caf504 · sha256:6f17e58f2ed4e352… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-918","description":"CWE-918: Server-Side Request Forgery (SSRF)","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:c7d8ce63d2975d76e727094050df47d0879e133b83d6635986404417a2caf504 · sha256:6f17e58f2ed4e352… · /containers/cna/problemTypes/1/descriptions/0
{"cweId":"CWE-441","description":"CWE-441: Unintended Proxy or Intermediary ('Confused Deputy')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:c7d8ce63d2975d76e727094050df47d0879e133b83d6635986404417a2caf504 · sha256:6f17e58f2ed4e352… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"tags":["exploit"],"url":"https://github.com/jpadilla/pyjwt/security/advisories/GHSA-993g-76c3-p5m4"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:c7d8ce63d2975d76e727094050df47d0879e133b83d6635986404417a2caf504 · sha256:6f17e58f2ed4e352… · /containers/adp/0/references/0
{"name":"https://github.com/jpadilla/pyjwt/security/advisories/GHSA-993g-76c3-p5m4","tags":["x_refsource_CONFIRM"],"url":"https://github.com/jpadilla/pyjwt/security/advisories/GHSA-993g-76c3-p5m4"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:c7d8ce63d2975d76e727094050df47d0879e133b83d6635986404417a2caf504 · sha256:6f17e58f2ed4e352… · /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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