CVE-2026-28755
NGINX ngx_stream_ssl_module vulnerability
CVSS Score
5.4
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-863 |
| Vendor | f5 |
| Product | nginx open source |
| Published | Mar 24, 2026 |
| Last Updated | Mar 24, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None
Affected Versions
F5 / NGINX Open Source
1.29.0 < 1.29.7 1.27.2 < 1.28.3
F5 / NGINX Plus
R36 < R36 P3 R35 < R35 P2 R34 < * R33 < *
Credits
🔍 Mufeed VH of Winfunc Research