Is CVE-2026-25555 in the CISA KEV catalog?

No. CVE-2026-25555 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-25555?

CVE-2026-25555 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2026-25555?

CVE-2026-25555 has an EPSS score of 1.51% (72th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix or mitigate 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.

CVE & CISA-KEV Catalog

CVE-2026-25555

CRITICALEPSS 72th pctl

9.8

CVSS v3

NVD

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.

CWE-305

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

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

1.51%probability of exploitation in 30 days

72ndpercentile

Elevated risk: more likely to be exploited than 72% of all known CVEs.

References

Other references2

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	45%	-	Fix
CVE-2024-37085	Medium	6.8	27%	KEV + Ransom	Fix
CVE-2025-32011	Critical	9.8	22%	-	-

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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 2026-07-14.