{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-33996 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2026-33996 is a medium-severity vulnerability in benmcollins libjwt, published on 27 Mar 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-33996 and fix it if it is affected.\n\nWhat it is: CVE-2026-33996 is a medium-severity vulnerability in benmcollins libjwt, published on 27 Mar 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2026-33996 in the wild and no public exploit code.\n\nAffected product: benmcollins libjwt. 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-2026-33996/ (Markdown: https://insights.sbomify.com/CVE-2026-33996/index.md)","id":"CVE-2026-33996","markdown":"https://insights.sbomify.com/CVE-2026-33996/index.md","name":"CVE-2026-33996","record":{"aliases":["DEBIAN-CVE-2026-33996","GHSA-ph96-hqpc-9f66","UBUNTU-CVE-2026-33996"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"C JWT library","requires_auth":"none","summary":"A crafted JWK file with integer values instead of strings causes a null pointer dereference in LibJWT, leading to denial of service.","user_interaction":"required","vuln_class":"null_dereference"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"libjwt","vendor":"libjwt"}],"cvss":{"score":5.8,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:A/AC:H/AT:P/PR:N/UI:A/VC:L/VI:L/VA:H/SC:L/SI:L/SA:L","version":"4.0"},"cwes":[{"id":"CWE-476","name":"NULL Pointer Dereference"}],"description":"LibJWT is a C JSON Web Token Library. Starting in version 3.0.0 and prior to version 3.3.0, the JWK parsing for RSA-PSS did not protect against a NULL value when expecting to parse JSON string values. A specially crafted JWK file could exploit this behavior by using integers in places where the code expected a string. This was fixed in v3.3.0. A workaround is available. Users importing keys through a JWK file should not do so from untrusted sources. Use the `jwk2key` tool to check for validity of a JWK file. Likewise, if possible, do not use JWK files with RSA-PSS keys.","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":"LibJWT has NULL/bounds validation in JWK octet and RSA PSS parsing","id":"CVE-2026-33996","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"null_dereference","year":"2026"},"n_packages":0,"n_references":2,"next":{"headline":"Moby: Off-by-one error in plugin privilege validation","id":"CVE-2026-33997"},"packages":[],"prev":{"headline":"FreeRDP: Possible double free in kerberos_AcceptSecurityContext","id":"CVE-2026-33995"},"products":["libjwt"],"published":"2026-03-27","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"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":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-03-31","vendors":["benmcollins"]},"summary":"A crafted JWK file with integer values instead of strings causes a null pointer dereference in LibJWT, leading to denial of service.","url":"https://insights.sbomify.com/CVE-2026-33996/"}