{"answers":{"affected":"2 open source packages ship an affected version, including kelvinmo/simplejwt. It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-33204 exists.","fix":"Upgrade kelvinmo/simplejwt to 1.1.1 or later.","what":"CVE-2026-33204 is a high-severity denial of service vulnerability in kelvinmo simplejwt, published on 20 Mar 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-2026-33204 and fix it if it is affected.\n\nWhat it is: CVE-2026-33204 is a high-severity denial of service vulnerability in kelvinmo simplejwt, published on 20 Mar 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-2026-33204 exists.\n\nAffected packages and fixed versions:\n- kelvinmo/simplejwt (Packagist): affected all versions; fixed in 1.1.1\n- kelvinmo/simplejwt (Packagist): affected all versions; fixed in 1.1.1\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-2026-33204/ (Markdown: https://insights.sbomify.com/CVE-2026-33204/index.md)","id":"CVE-2026-33204","markdown":"https://insights.sbomify.com/CVE-2026-33204/index.md","name":"CVE-2026-33204","record":{"aliases":["GHSA-xw36-67f8-339x"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":true,"product_category":"PHP JWT library","requires_auth":"none","summary":"An unauthenticated attacker can cause a denial of service in applications using SimpleJWT by tampering with JWE headers when PBES2 algorithms are enabled.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"simplejwt","vendor":"kelvinmo"}],"cvss":{"score":7.5,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-400","name":"Uncontrolled Resource Consumption"}],"description":"SimpleJWT is a simple JSON web token library written in PHP. Prior to version 1.1.1, an unauthenticated attacker can perform a Denial of Service via JWE header tampering when PBES2 algorithms are used. Applications that call JWE::decrypt() on attacker-controlled JWEs using PBES2 algorithms are affected. This issue has been patched in version 1.1.1.","ecosystems":["Packagist"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"SimpleJWT has an Unauthenticated Denial of Service via JWE header tampering","id":"CVE-2026-33204","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Packagist","product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":2,"n_references":2,"next":{"headline":"calibre has Server-Side Request Forgery in ebook viewer backend","id":"CVE-2026-33205"},"packages":[{"ecosystem":"Packagist","fixed":["1.1.1"],"introduced":["0"],"last_affected":[],"package":"kelvinmo/simplejwt","purl":null,"source":"GHSA-xw36-67f8-339x"},{"ecosystem":"Packagist","fixed":["1.1.1"],"introduced":["0"],"last_affected":[],"package":"kelvinmo/simplejwt","purl":"pkg:composer/kelvinmo/simplejwt","source":"GHSA-xw36-67f8-339x"}],"prev":{"headline":"SiYuan has an Unauthenticated WebSocket DoS via Auth Keepalive Bypass","id":"CVE-2026-33203"},"products":["simplejwt"],"published":"2026-03-20","related":[],"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":"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":"2026-03-24","vendors":["kelvinmo"]},"summary":"An unauthenticated attacker can cause a denial of service in applications using SimpleJWT by tampering with JWE headers when PBES2 algorithms are enabled.","url":"https://insights.sbomify.com/CVE-2026-33204/"}