{"answers":{"affected":"6 open source packages ship an affected version, including org.pac4j:pac4j-jwt.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-29000 exists.","fix":"Upgrade org.pac4j:pac4j-jwt to a fixed version for your release line: 4.5.9, 5.7.9 or 6.3.3.","what":"CVE-2026-29000 is a critical authentication bypass vulnerability in pac4j-jwt, published on 4 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-2026-29000 and fix it if it is affected.\n\nWhat it is: CVE-2026-29000 is a critical authentication bypass vulnerability in pac4j-jwt, published on 4 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-2026-29000 exists.\n\nAffected packages and fixed versions:\n- org.pac4j:pac4j-jwt (Maven): affected all versions; fixed in 4.5.9\n- org.pac4j:pac4j-jwt (Maven): affected all versions; fixed in 4.5.9\n- org.pac4j:pac4j-jwt (Maven): affected from 5.0.0-RC1; fixed in 5.7.9\n- org.pac4j:pac4j-jwt (Maven): affected from 5.0.0-RC1; fixed in 5.7.9\n- org.pac4j:pac4j-jwt (Maven): affected from 6.0.4.1; fixed in 6.3.3\n- org.pac4j:pac4j-jwt (Maven): affected from 6.0.4.1; fixed in 6.3.3\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-2026-29000/ (Markdown: https://insights.sbomify.com/CVE-2026-29000/index.md)","id":"CVE-2026-29000","markdown":"https://insights.sbomify.com/CVE-2026-29000/index.md","name":"CVE-2026-29000","record":{"aliases":["GHSA-pm7g-w2cf-q238"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["privilege_escalation","account_takeover"],"network_reachable":"yes","non_default_config":false,"product_category":"Java JWT library","requires_auth":"none","summary":"Attackers with the server's RSA public key can forge JWTs to bypass authentication and gain administrator access in applications using pac4j-jwt.","user_interaction":"not_required","vuln_class":"auth_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":"pac4j-jwt versions prior to 4.5.9, 5.7.9, and 6.3.3 contain an authentication bypass vulnerability in JwtAuthenticator when processing encrypted JWTs that allows remote attackers to forge authentication tokens. Attackers who possess the server's RSA public key can create a JWE-wrapped PlainJWT with arbitrary subject and role claims, bypassing signature verification to authenticate as any user including administrators.","ecosystems":["Maven"],"exploits":{"exploitdb":0,"first_seen":"2026-03-05","github_poc":22,"max_poc_stars":9,"metasploit":0,"nuclei":0,"refs":[{"date":"2026-03-05T20:19:58Z","kind":"github_poc","ref":"https://github.com/kernelzeroday/CVE-2026-29000","stars":9,"title":"pac4j-jwt JwtAuthenticator auth bypass (CVE-2026-29000) writeup and PoCs"},{"date":"2026-05-03T07:20:31Z","kind":"github_poc","ref":"https://github.com/Strikoder-Premium/CVE-2026-29000-pac4j-jwt","stars":3,"title":"CVE-2026-29000 PoC: pac4j-jwt PlainJWT-in-JWE authentication bypass."},{"date":"2026-05-12T16:03:01Z","kind":"github_poc","ref":"https://github.com/tc4dy/CVE-2026-29000-PoC-Exploit","stars":3,"title":"CVE-2026-29000 – pac4j-jwt Authentication Bypass (CVSS 10.0). One-click admin forge via public key JWE wrapping. Leaks configs, users, secrets. Keep-alive, proxy, custom JWKS. Educational PoC Exploit tool."},{"date":"2026-03-13T10:23:19Z","kind":"github_poc","ref":"https://github.com/alihussainzada/CVE-2026-29000-Python-PoC-pac4j-JWT-AuthenticationBypass-Poc","stars":2,"title":null},{"date":"2026-03-16T04:32:05Z","kind":"github_poc","ref":"https://github.com/RootX111/cve-2026-29000","stars":2,"title":"cve-2026-29000 exploit"},{"date":"2026-03-13T02:38:37Z","kind":"github_poc","ref":"https://github.com/manbahadurthapa1248/CVE-2026-29000---pac4j-jwt-Authentication-Bypass-PoC","stars":1,"title":"CVE-2026-29000 - pac4j-jwt Authentication Bypass PoC"},{"date":"2026-03-13T19:15:29Z","kind":"github_poc","ref":"https://github.com/otuva/CVE-2026-29000","stars":1,"title":null},{"date":"2026-03-24T09:24:49Z","kind":"github_poc","ref":"https://github.com/PtechAmanja/CVE-2026-29000-pac4j-jwt-auth-bypass","stars":1,"title":"Proof-of-Concept (PoC) for an authentication bypass vulnerability affecting applications using pac4j-jwt with JWE (JSON Web Encryption)."}],"tier":"weaponised"},"has_fix":true,"headline":"pac4j-jwt JwtAuthenticator Authentication Bypass","id":"CVE-2026-29000","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Maven","product":null,"products":[],"type":"auth_bypass","year":"2026"},"n_packages":6,"n_references":3,"next":{"headline":"TastyIgniter 4.4.5 PHP Object Injection via Settings Deserialization","id":"CVE-2026-29001"},"packages":[{"ecosystem":"Maven","fixed":["4.5.9"],"introduced":["0"],"last_affected":[],"package":"org.pac4j:pac4j-jwt","purl":null,"source":"GHSA-pm7g-w2cf-q238"},{"ecosystem":"Maven","fixed":["4.5.9"],"introduced":["0"],"last_affected":[],"package":"org.pac4j:pac4j-jwt","purl":"pkg:maven/org.pac4j/pac4j-jwt","source":"GHSA-pm7g-w2cf-q238"},{"ecosystem":"Maven","fixed":["5.7.9"],"introduced":["5.0.0-RC1"],"last_affected":[],"package":"org.pac4j:pac4j-jwt","purl":null,"source":"GHSA-pm7g-w2cf-q238"},{"ecosystem":"Maven","fixed":["5.7.9"],"introduced":["5.0.0-RC1"],"last_affected":[],"package":"org.pac4j:pac4j-jwt","purl":"pkg:maven/org.pac4j/pac4j-jwt","source":"GHSA-pm7g-w2cf-q238"},{"ecosystem":"Maven","fixed":["6.3.3"],"introduced":["6.0.4.1"],"last_affected":[],"package":"org.pac4j:pac4j-jwt","purl":null,"source":"GHSA-pm7g-w2cf-q238"},{"ecosystem":"Maven","fixed":["6.3.3"],"introduced":["6.0.4.1"],"last_affected":[],"package":"org.pac4j:pac4j-jwt","purl":"pkg:maven/org.pac4j/pac4j-jwt","source":"GHSA-pm7g-w2cf-q238"}],"prev":{"headline":"This CVE ID has been rejected or withdrawn by its CVE Numbering Authority.","id":"CVE-2026-28999"},"products":["pac4j-jwt"],"published":"2026-03-04","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":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"},{"class":"open","licence":"CC0","name":"PoC-in-GitHub"}],"ssvc":{"automatable":"yes","exploitation":"poc","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-10-08","vendors":["pac4j"]},"summary":"Attackers with the server's RSA public key can forge JWTs to bypass authentication and gain administrator access in applications using pac4j-jwt.","url":"https://insights.sbomify.com/CVE-2026-29000/"}