{"id":"CVE-2026-25555","aliases":["EUVD-2026-35138","GHSA-54jj-4v6g-j34h"],"status":"published","title":"OpenBullet2 0.3.2 Authentication Bypass via X-Api-Key Header","description":"OpenBullet2 through version 0.3.2 contains an authentication bypass vulnerability in the API key authentication middleware that allows unauthenticated attackers to gain admin access by supplying an empty X-Api-Key header value. Attackers can exploit the middleware's comparison of the supplied header against an empty AdminApiKey default string to access the admin console and all API endpoints without valid credentials.","severity":{"version":"4.0","score":9.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.02261,"percentile":0.83113,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"cwes":["CWE-305"],"published":"2026-06-08T16:53:37Z","modified":"2026-10-28T02:30:37Z","exploits":[{"source":"metasploit","id":"exploit/multi/http/openbullet2_unauth_rce_cve_2026_25856","title":"OpenBullet2 Unauthenticated RCE via Config Configuration Interface","type":"exploit","platform":"Linux,Unix,Windows","date":"2026-06-08","verified":true,"url":"https://www.rapid7.com/db/modules/exploit/multi/http/openbullet2_unauth_rce_cve_2026_25856"},{"source":"metasploit","id":"auxiliary/scanner/http/openbullet2_unauth_hash_disclosure_cve_2026_39908","title":"OpenBullet2 NTLMv2 Hash Disclosure via UNC Path Proxy Source","type":"auxiliary","date":"2026-06-08","verified":true,"url":"https://www.rapid7.com/db/modules/auxiliary/scanner/http/openbullet2_unauth_hash_disclosure_cve_2026_39908"},{"source":"nuclei","id":"CVE-2026-25555","title":"OpenBullet2 \u003c= 0.3.2 - Authentication Bypass","type":"detection template","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-25555.yaml"}],"products":[{"vendor":"openbullet","product":"openbullet2"}],"references":[{"url":"https://hackernoon.com/one-empty-header-to-admin-how-an-auth-bypass-breaks-openbullet2","tags":["technical-description","exploit","evidence"]},{"url":"https://www.vulncheck.com/advisories/openbullet2-authentication-bypass-via-x-api-key-header","tags":["third-party-advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-25555","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-54jj-4v6g-j34h"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/25xxx/CVE-2026-25555.json","tags":["advisory"]},{"url":"https://github.com/openbullet/openbullet2","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2026-25555","title":"OpenBullet2 0.3.2 Authentication Bypass via X-Api-Key Header","description":"OpenBullet2 through version 0.3.2 contains an authentication bypass vulnerability in the API key authentication middleware that allows unauthenticated attackers to gain admin access by supplying an empty X-Api-Key header value. Attackers can exploit the middleware's comparison of the supplied header against an empty AdminApiKey default string to access the admin console and all API endpoints without valid credentials.","status":"published","published":"2026-06-08T16:53:37.27Z","modified":"2026-07-14T15:53:41.845Z","cvss":[{"version":"4.0","score":9.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"critical","assessor":"cna"},{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"cna"}],"cwes":["CWE-305"],"updated_at":"2026-11-02T13:41:30.911526Z"}],"euvd":[{"id":"EUVD-2026-35138","description":"OpenBullet2 through version 0.3.2 contains an authentication bypass vulnerability in the API key authentication middleware that allows unauthenticated attackers to gain admin access by supplying an empty X-Api-Key header value. Attackers can exploit the middleware's comparison of the supplied header against an empty AdminApiKey default string to access the admin console and all API endpoints without valid credentials.","status":"published","published":"2026-06-08T16:53:37Z","modified":"2026-07-14T15:53:41Z","cvss":[{"version":"4.0","score":9.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"critical"}],"updated_at":"2026-11-02T18:19:59.200665Z"}],"ghsa":[{"id":"GHSA-54jj-4v6g-j34h","title":"OpenBullet2 through version 0.3.2 contains an authentication bypass vulnerability in the API key...","description":"OpenBullet2 through version 0.3.2 contains an authentication bypass vulnerability in the API key authentication middleware that allows unauthenticated attackers to gain admin access by supplying an empty X-Api-Key header value. Attackers can exploit the middleware's comparison of the supplied header against an empty AdminApiKey default string to access the admin console and all API endpoints without valid credentials.","status":"published","published":"2026-06-08T18:31:51Z","modified":"2026-06-08T18:31:55Z","cvss":[{"version":"4.0","score":9.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"critical"},{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-305"],"updated_at":"2026-11-02T15:08:39.337223Z"}],"nvd":[{"id":"CVE-2026-25555","description":"OpenBullet2 through version 0.3.2 contains an authentication bypass vulnerability in the API key authentication middleware that allows unauthenticated attackers to gain admin access by supplying an empty X-Api-Key header value. Attackers can exploit the middleware's comparison of the supplied header against an empty AdminApiKey default string to access the admin console and all API endpoints without valid credentials.","status":"published","published":"2026-06-08T17:16:41.08Z","modified":"2026-07-23T07:10:00.113Z","cvss":[{"version":"4.0","score":9.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"critical","assessor":"secondary"},{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"secondary"}],"cwes":["CWE-305"],"updated_at":"2026-11-02T14:12:22.73178Z"}],"osv":[{"id":"CVE-2026-25555","title":"OpenBullet2 0.3.2 Authentication Bypass via X-Api-Key Header","description":"OpenBullet2 through version 0.3.2 contains an authentication bypass vulnerability in the API key authentication middleware that allows unauthenticated attackers to gain admin access by supplying an empty X-Api-Key header value. Attackers can exploit the middleware's comparison of the supplied header against an empty AdminApiKey default string to access the admin console and all API endpoints without valid credentials.","status":"published","published":"2026-06-08T16:53:37.27Z","modified":"2026-10-28T02:30:37.000580327Z","cvss":[{"version":"4.0","score":9.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"critical"}],"cwes":["CWE-305"],"updated_at":"2026-11-02T15:44:59.438965Z"}]}}