CVE-2026-25555: critical vulnerability in openbullet2
OpenBullet2 0.3.2 Authentication Bypass via X-Api-Key Header
Published · Updated
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63Vexday Risk Score
Patch soon. It has a working public exploit.
ssvc Attendcvss 9.3epss 2.3%
from disclosure to weapon28 days
Published on NVDJun 8
1st PoC+28d
metasploitJun 8
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.
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
Affected products
openbullet · openbullet2public PoCs found — 2
githubgithub.com/thecodeb0ss/CVE-2026-25555★ 0cve_referencehackernoon.com/one-empty-header-to-admin-how-an-auth-bypass-breaks-openbullet2unverified⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
Related CVEs — openbullet2
In the same product, most dangerous first.
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