{"answers":{"affected":"3 open source packages ship an affected version, including pyjwt and PyJWT. It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-102274 exists.","fix":"Upgrade pyjwt to 2.14.0 or later.","what":"CVE-2026-102274 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-2026-102274 and fix it if it is affected.\n\nWhat it is: CVE-2026-102274 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-2026-102274 exists.\n\nAffected packages and fixed versions:\n- pyjwt (PyPI): affected from 2.9.0; fixed in 2.14.0\n- pyjwt (PyPI): affected from 2.9.0; fixed in 2.14.0\n- PyJWT (PyPI): affected from 2.9.0; 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-2026-102274/ (Markdown: https://insights.sbomify.com/CVE-2026-102274/index.md)","id":"CVE-2026-102274","markdown":"https://insights.sbomify.com/CVE-2026-102274/index.md","name":"CVE-2026-102274","record":{"aliases":["AZL-105236","CLEANSTART-2026-LD97842","CLEANSTART-2026-YX87387","CLSA-2026-1790745888","DEBIAN-CVE-2026-102274","ECHO-aad4-edd4-a5d2","GHSA-w6j9-cwv2-h6wq","MINI-2g8f-hqrv-722w","MINI-2gf7-mfrj-c46v","MINI-3cr4-mpv4-r6g9","MINI-473m-gwhh-7pmr","MINI-4jcp-x72p-7q7g","MINI-656c-5gpj-4qp9","MINI-6qff-4fp2-wvcx","MINI-6whw-qrq2-98cr","MINI-7c4x-5xxq-4fwp","MINI-98m8-4pp5-r234","MINI-9q73-c76f-pqvh","MINI-cxhx-f4mm-99xc","MINI-f9xh-xmfw-9635","MINI-j53j-7gr9-j5x3","MINI-j7v4-83q2-vcm2","MINI-jgr3-7cq8-8vjf","MINI-jm98-p6r9-xmr9","MINI-mcj4-f462-rr9h","MINI-mv4r-c66g-4v3r","MINI-p8v5-g93m-xqc4","MINI-v7g2-2c4g-q7wg","MINI-v8qx-64h9-wfxg","MINI-w88h-2v2q-v4r8","MINI-x3fr-rh85-wq57","MINI-x5w4-778w-cfqh","PYSEC-2026-4152","UBUNTU-CVE-2026-102274"],"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":"A malformed RSA key in a JWK Set causes PyJWT to abort parsing, leading to authentication failures or denial of service for applications using the library.","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":5.9,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-755","name":"Improper Handling of Exceptional Conditions"}],"description":"PyJWT is a Python implementation of JSON Web Token standards. From 2.9.0 until 2.14.0, PyJWKSet does not catch the plain ValueError raised for malformed RSA JWK components by RSAAlgorithm.from_jwk in  jwt/api_jwk.py. This occurs when a JWK Set contains a malformed RSA key alongside otherwise usable keys. As a result, one malformed member aborts construction of the entire PyJWKSet. Consequently, applications can experience authentication failures or request-level denial of service. 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: Malformed RSA JWK aborts parsing of an entire JWK Set","id":"CVE-2026-102274","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 accepts inconsistent OKP x/d JWKs, causing public/private key identity confusion","id":"CVE-2026-102275"},"packages":[{"ecosystem":"PyPI","fixed":["2.14.0"],"introduced":["2.9.0"],"last_affected":[],"package":"PyJWT","purl":null,"source":"GHSA-w6j9-cwv2-h6wq"},{"ecosystem":"PyPI","fixed":["2.14.0"],"introduced":["2.9.0"],"last_affected":[],"package":"pyjwt","purl":"pkg:pypi/pyjwt","source":"GHSA-w6j9-cwv2-h6wq"},{"ecosystem":"PyPI","fixed":["2.14.0"],"introduced":["2.9.0"],"last_affected":[],"package":"pyjwt","purl":"pkg:pypi/pyjwt","source":"PYSEC-2026-4152"}],"prev":{"headline":"PyJWT accepts public JWK containers as HMAC secrets","id":"CVE-2026-102273"},"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":"no","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-09-29","vendors":["jpadilla"]},"summary":"A malformed RSA key in a JWK Set causes PyJWT to abort parsing, leading to authentication failures or denial of service for applications using the library.","url":"https://insights.sbomify.com/CVE-2026-102274/"}