{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-85394 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2026-85394 is a critical vulnerability in mpdavis python-jose, published on 3 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-2026-85394 and fix it if it is affected.\n\nWhat it is: CVE-2026-85394 is a critical vulnerability in mpdavis python-jose, published on 3 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-85394 in the wild and no public exploit code.\n\nAffected product: mpdavis python-jose. No package-level version data is available, so check the vendor advisory linked from the reference page.\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-2026-85394/ (Markdown: https://insights.sbomify.com/CVE-2026-85394/index.md)","id":"CVE-2026-85394","markdown":"https://insights.sbomify.com/CVE-2026-85394/index.md","name":"CVE-2026-85394","record":{"aliases":["CLSA-2026-1791441237","ROOT-APP-PYPI-CVE-2026-85394","UBUNTU-CVE-2026-85394"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":true,"product_category":"Python JWT library","requires_auth":"none","summary":"Attackers can forge JWT tokens by exploiting algorithm confusion in python-jose when asymmetric keys are used as HMAC secrets without explicit algorithm restrictions.","user_interaction":"not_required","vuln_class":"security_feature_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[],"cvss":{"score":9.3,"severity":"critical","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-347","name":"Improper Verification of Cryptographic Signature"}],"description":"python-jose through 3.5.0 fails to properly validate asymmetric keys in HMAC initialization, accepting DER-encoded public keys that lack PEM armor or SSH prefixes. Attackers holding the service's public key can forge HS256 tokens that pass verification when algorithms are not explicitly restricted. This is an incomplete fix for CVE-2024-33663.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"python-jose through 3.5.0 Algorithm Confusion via DER-encoded Public Key as HMAC Secret","id":"CVE-2026-85394","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"security_feature_bypass","year":"2026"},"n_packages":0,"n_references":6,"next":{"headline":"UnoPim before 2.1.3 Missing Authorization on Integration Management Routes","id":"CVE-2026-85395"},"packages":[],"prev":{"headline":"node-forge through 1.4.0 RSA PKCS#1 v1.5 Signature Forgery via Nested DigestAlgorithm Padding","id":"CVE-2026-85393"},"products":["python-jose"],"published":"2026-09-03","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-09-14","vendors":["mpdavis"]},"summary":"Attackers can forge JWT tokens by exploiting algorithm confusion in python-jose when asymmetric keys are used as HMAC secrets without explicit algorithm restrictions.","url":"https://insights.sbomify.com/CVE-2026-85394/"}