{"answers":{"affected":"3 open source packages ship an affected version, including pyjwt. It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-101917 exists.","fix":"Upgrade pyjwt to 2.14.0 or later.","what":"CVE-2026-101917 is a medium-severity denial of service vulnerability in jpadilla pyjwt, published on 28 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-101917 and fix it if it is affected.\n\nWhat it is: CVE-2026-101917 is a medium-severity denial of service vulnerability in jpadilla pyjwt, published on 28 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-101917 exists.\n\nAffected packages and fixed versions:\n- pyjwt (PyPI): affected all versions; fixed in 2.14.0\n- pyjwt (PyPI): affected all versions; fixed in 2.14.0\n- pyjwt (PyPI): affected all versions; fixed in 2.14.0\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-101917/ (Markdown: https://insights.sbomify.com/CVE-2026-101917/index.md)","id":"CVE-2026-101917","markdown":"https://insights.sbomify.com/CVE-2026-101917/index.md","name":"CVE-2026-101917","record":{"aliases":["AZL-104982","CLEANSTART-2026-QR87061","CLEANSTART-2026-UK80240","DEBIAN-CVE-2026-101917","ECHO-4350-3a06-160e","GHSA-2gx3-rcp4-g85q","MINI-246f-349m-gfcm","MINI-24j3-qf3x-x6hc","MINI-27cc-777w-2wfh","MINI-2f5v-9254-8xwg","MINI-2xgp-4r4x-wqxf","MINI-454r-vqfg-cq3x","MINI-4vxx-5hfc-3657","MINI-5mfm-rqww-hqcm","MINI-5x7p-4v95-3j9r","MINI-6hm6-m22p-cr39","MINI-73wf-7hqf-cr42","MINI-7xpm-956c-xg6m","MINI-85cm-4wfv-63mr","MINI-9r4h-5xww-rhhf","MINI-9rcr-744f-frv9","MINI-c32j-mp42-5xj7","MINI-c5m8-pq4c-fhrg","MINI-g8m3-3x83-8mh7","MINI-p7v7-rvfp-4rph","MINI-q8cj-mq3r-7qw9","MINI-r447-whpw-w2w9","MINI-v9qm-jrx4-9p68","MINI-vrp4-9g69-5996","MINI-w5vc-648g-gfrq","MINI-x9w3-97jw-6m39","PYSEC-2026-4140","UBUNTU-CVE-2026-101917"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Python JWT library","requires_auth":"none","summary":"Attackers can cause denial of service by amplifying outbound requests to JWKS endpoints via unknown key IDs in PyJWT.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"pyjwt","vendor":"pyjwt_project"}],"cvss":{"score":5.3,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","version":"3.1"},"cwes":[{"id":"CWE-770","name":"Allocation of Resources Without Limits or Throttling"}],"description":"PyJWT is a Python implementation of JSON Web Token standards. Prior to 2.14.0, PyJWT get_signing_key_from_jwt is affected because unknown kid misses force refreshes without a negative cache or minimum refresh interval. This occurs when unauthenticated tokens repeatedly use the same unknown kid or varying kid values absent from the cached JWKS. As a result, each cache miss causes PyJWKClient to refresh the JWKS. Consequently, attacker traffic can amplify outbound requests to the configured JWKS endpoint. This issue is fixed in version 2.14.0.","ecosystems":["PyPI"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"PyJWT: PyJWKClient still amplifies unauthenticated JWKS fetches on unknown kid values (incomplete fix of CVE-2026-48524)","id":"CVE-2026-101917","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"PyPI","product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":3,"n_references":3,"next":{"headline":"PyJWT: Unauthenticated RecursionError DoS in pre-verification payload parse (PyJWKClient.get_signing_key_from_jwt / verify_signature=False)","id":"CVE-2026-101918"},"packages":[{"ecosystem":"PyPI","fixed":["2.14.0"],"introduced":["0"],"last_affected":[],"package":"pyjwt","purl":null,"source":"GHSA-2gx3-rcp4-g85q"},{"ecosystem":"PyPI","fixed":["2.14.0"],"introduced":["0"],"last_affected":[],"package":"pyjwt","purl":"pkg:pypi/pyjwt","source":"GHSA-2gx3-rcp4-g85q"},{"ecosystem":"PyPI","fixed":["2.14.0"],"introduced":["0"],"last_affected":[],"package":"pyjwt","purl":"pkg:pypi/pyjwt","source":"PYSEC-2026-4140"}],"prev":{"headline":"@grpc/grpc-js: In certain configurations, getAuthContext can return unauthorized certificates as though they were authorized","id":"CVE-2026-101916"},"products":["pyjwt"],"published":"2026-09-28","related":[{"cvss_score":9.1,"headline":"PyJWT: Asymmetric-PEM detection bypass: whitespace/line-ending-mutated public keys skip the HS/asymmetric confusion guard","id":"CVE-2026-102268","kev_date_added":null,"published":"2026-09-28"},{"cvss_score":7.5,"headline":"PyJWT accepts unknown `crit` header extensions (RFC 7515 §4.1.11 MUST violation)","id":"CVE-2026-32597","kev_date_added":null,"published":"2026-03-12"},{"cvss_score":7.4,"headline":"PyJWK accepts empty HMAC keys, bypassing PyJWT's empty-key validation","id":"CVE-2026-102266","kev_date_added":null,"published":"2026-09-28"},{"cvss_score":7.4,"headline":"PyJWT: PyJWKClient follows redirects when fetching JWKS","id":"CVE-2026-102267","kev_date_added":null,"published":"2026-09-28"},{"cvss_score":7.4,"headline":"PyJWT: Public keys in DER form are accepted as HMAC secrets, bypassing the CVE-2022-29217 guard","id":"CVE-2026-102271","kev_date_added":null,"published":"2026-09-28"},{"cvss_score":7.4,"headline":"PyJWT BOM Bypass","id":"CVE-2026-102272","kev_date_added":null,"published":"2026-09-28"},{"cvss_score":7.4,"headline":"PyJWT accepts public JWK containers as HMAC secrets","id":"CVE-2026-102273","kev_date_added":null,"published":"2026-09-28"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CC BY 4.0","name":"PyPA Advisory Database","prefix":"PYSEC"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-09-28","vendors":["jpadilla"]},"summary":"Attackers can cause denial of service by amplifying outbound requests to JWKS endpoints via unknown key IDs in PyJWT.","url":"https://insights.sbomify.com/CVE-2026-101917/"}