CVE-2026-25555
OpenBullet2 0.3.2 Authentication Bypass via X-Api-Key Header
- Published
- Jun 8, 2026
- Updated
- Jul 14, 2026
- Assigning CNA
- VulnCheck
Primary CVSS
nvd · CVSS 4.0
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:XLow · next 30 days
- Percentile
- 78.8%
- Model date
- Nov 2, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
Summary
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.
Sources
http/cves/2026/CVE-2026-25555.yaml
Nuclei TemplatesDeclared conditions
- network: http($.protocol_keys)
- verification: dsl($.matchers[*].type)
modules/auxiliary/scanner/http/openbullet2_unauth_hash_disclosure_cve_2026_39908.rb
Metasploit Framework modulesDeclared conditions
- verification: check_declared($.auxiliary_scanner/http/openbullet2_unauth_hash_disclosure_cve_2026_39908.check)
modules/exploits/multi/http/openbullet2_unauth_rce_cve_2026_25856.rb
Metasploit Framework modulesDeclared conditions
- platform: Linux,Unix,Windows($.exploit_multi/http/openbullet2_unauth_rce_cve_2026_25856.platform)
- verification: check_declared($.exploit_multi/http/openbullet2_unauth_rce_cve_2026_25856.check)
Responsible use
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