CVE-2026-27604

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
• Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

1.26% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 69.4% of scored records. A rank, not a probability.

NVD base score

10.0 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/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

NVD analysis status

Deferred. NVD last modified this record on 2026-06-23.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-06-23 14:25Z4 MO AGO

Last updated

2026-06-23 15:11Z4 MO AGO

Reserved

2026-02-20

Assigning CNA

GitHub_M

Record state

PUBLISHED

Severity

Critical (CVSS 10.0)

CNA CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

Weaknesses

• CWE-200Exposure of Sensitive Information to an Unauthorized ActorClass
• CWE-306Missing Authentication for Critical FunctionBase
• CWE-862Missing AuthorizationClass
• CWE-863Incorrect AuthorizationClass

Data version

5.2

Document digest

aaf55e18d06cd8732c42ae6556aff884c258b877d167f5797e72fad458db987e

• github.comhttps://github.com/FOSSBilling/FOSSBilling/security/advisories/GHSA-78x5-c8gw-8279x_refsource_CONFIRM
• github.comhttps://github.com/FOSSBilling/FOSSBilling/security/advisories/GHSA-57mv-jm88-66jcx_refsource_MISC
• www.vulncheck.comhttps://www.vulncheck.com/blog/fossbilling-auth-bypass-ssti-rcex_refsource_MISC