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CVE-2026-28755 Details

Description

NGINX Plus and NGINX Open Source have a vulnerability in the ngx_stream_ssl_module module due to the improper handling of revoked certificates when configured with the ssl_verify_client on and ssl_ocsp on directives, allowing the TLS handshake to succeed even after an OCSP check identifies the certificate as revoked. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:5.4 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

CNA: [email protected]CVSS-B:5.4 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://my.f5.com/manage/s/article/K000160368	[email protected]	MitigationVendor Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-863	Incorrect Authorization	[email protected]

Affected Products

Product	Versions
f5 nginx plus	r33 r33 p1 r33 p2 r33 p3 r34
CPE cpe:2.3:a:f5:nginx_plus:r33:::::::* cpe:2.3:a:f5:nginx_plus:r33:p1:::::: cpe:2.3:a:f5:nginx_plus:r33:p2:::::: cpe:2.3:a:f5:nginx_plus:r33:p3:::::: cpe:2.3:a:f5:nginx_plus:r34:::::::* cpe:2.3:a:f5:nginx_plus:r34:p1:::::: cpe:2.3:a:f5:nginx_plus:r34:p2:::::: cpe:2.3:a:f5:nginx_plus:r35:p1:::::: cpe:2.3:a:f5:nginx_plus:r36:::::::* cpe:2.3:a:f5:nginx_plus:r36:p1:::::: cpe:2.3:a:f5:nginx_plus:r36:p2:::::: Remediation No remediation found in references.
f5 nginx open source	>= 0.5.13, <= 0.9.7 >= 1.27.2, < 1.28.3 >= 1.29.0, < 1.29.7
CPE cpe:2.3:a:f5:nginx_open_source:::::::: Remediation No remediation found in references.

Change History

4 change records found show changes

Date	Action	Recorded By
Jun 17, 2026	CVE Modified	[email protected]
Jun 17, 2026	CVE Modified	CISA-ADP
Mar 26, 2026	Initial Analysis	[email protected]
Mar 24, 2026	New CVE Received	[email protected]