How severe is CVE-2026-50107?

CVE-2026-50107 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2026-50107 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (40th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-50107?

CVE-2026-50107 affects F5 Nginx Gateway Fabric. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-50107?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-50107 have an EU (EUVD) identifier?

Yes. CVE-2026-50107 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-37792.

When was CVE-2026-50107 published?

CVE-2026-50107 was published on 2026-06-17 and last updated on 2026-06-22.

CVE-2026-50107

CVE-2026-50107 is a high-severity vulnerability in F5 Nginx Gateway Fabric with a CVSS 3.x base score of 8.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-74.

Key facts

Severity: High (CVSS 3.x base score 8.1)
CVSS v4: 8.6
EPSS exploit prediction: 0% (40th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-37792
Weakness: CWE-74
Affected product: F5 Nginx Gateway Fabric
Published: 2026-06-17
Last modified: 2026-06-22

Description

When NGINX Plus or NGINX Open Source is configured as the data plane for NGINX Gateway Fabric, an injection vulnerability exists in the NGINX configuration generator component of NGINX Gateway Fabric. User-supplied string values from the NginxProxy Custom Resource Definition (CRD) access log format setting are rendered directly into NGINX configuration templates without sanitization or escaping. An authenticated attacker with permission to create or modify these CRDs may craft values that inject arbitrary NGINX configuration directives. This is a control plane issue; there is no data plane exposure from the vulnerability trigger itself. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Frequently asked questions

What is CVE-2026-50107?: When NGINX Plus or NGINX Open Source is configured as the data plane for NGINX Gateway Fabric, an injection vulnerability exists in the NGINX configuration generator component of NGINX Gateway Fabric. User-supplied string values from the NginxProxy Custom Resource Definition (CRD) access log format setting are rendered directly into NGINX configuration templates without sanitization or escaping. An authenticated attacker with permission to create or modify these CRDs may craft values that inject arbitrary NGINX configuration directives. This is a control plane issue; there is no data plane exposure from the vulnerability trigger itself. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
How severe is CVE-2026-50107?: CVE-2026-50107 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2026-50107 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (40th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-50107?: CVE-2026-50107 affects F5 Nginx Gateway Fabric. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-50107?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-50107 have an EU (EUVD) identifier?: Yes. CVE-2026-50107 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-37792.
When was CVE-2026-50107 published?: CVE-2026-50107 was published on 2026-06-17 and last updated on 2026-06-22.

References

https://my.f5.com/manage/s/article/K000161785

Affected products (1)

cpe:2.3:a:f5:nginx_gateway_fabric:*:*:*:*:*:*:*:*

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