CVE-2026-25555
CRITICALEPSS 77th pctlDescription
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.
How to fix
No published remediation has been found for this vulnerability's affected products yet.
Mitigation guidance may be in the linked vendor advisories in the References section below.
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CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Exploit Intelligence
Elevated risk: more likely to be exploited than 77% of all known CVEs.
References
Related Vulnerabilities
Other CWE-305 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2025-31161 | Critical | 9.8 | 100% | KEV + Ransom | Fix |
| CVE-2020-10923 | High | 8.8 | 85% | - | - |
| CVE-2023-28126 | Medium | 5.9 | 67% | - | - |
| CVE-2023-34124 | Critical | 9.8 | 46% | - | Fix |
| CVE-2025-32011 | Critical | 9.8 | 27% | - | - |
| CVE-2024-37085 | Medium | 6.8 | 26% | KEV + Ransom | Fix |
Common questions
How do I fix CVE-2026-25555?
No published fix for CVE-2026-25555 has been found yet. Check the linked vendor advisories for guidance as it becomes available.
Is CVE-2026-25555 being actively exploited?
Not that we know of. CVE-2026-25555 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 1.8% is the estimated probability that it will be exploited in the next 30 days. That is higher than 77% of all scored CVEs.
How severe is CVE-2026-25555?
CVE-2026-25555 has a CVSS v3 base score of 9.8, rated critical. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-07-23.