Detections
Analytics
nginx 1.27.2 < 1.28.3 / 1.29.x < 1.29.7 OCSP Result Bypass
medium Nessus Plugin ID 306672
Language:
Synopsis
The remote web server is affected by a vulnerability.Description
The installed version of nginx is 1.27.2 prior to 1.28.3, or 1.29.x prior to 1.29.7. It is, therefore, affected by the following issue :- 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. (CVE-2026-28755)
Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.
Solution
Upgrade to nginx 1.28.3 / 1.29.7 or later.See Also
Plugin Details
Severity: Medium
ID: 306672
File Name: nginx_CVE-2026-28755.nasl
Version: 1.2
Type: Combined
Agent: unix
Family: Web Servers
Published: 4/16/2026
Updated: 4/17/2026
Configuration: Enable paranoid mode
Supported Sensors: Nessus Agent, Nessus
Risk Information
VPR
Risk Factor: Low
Score: 3.3
CVSS v2
Risk Factor: Medium
Base Score: 5.5
Temporal Score: 4.1
Vector: CVSS2#AV:N/AC:L/Au:S/C:P/I:P/A:N
CVSS Score Source: CVE-2026-28755
CVSS v3
Risk Factor: Medium
Base Score: 5.4
Temporal Score: 4.7
Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
CVSS v4
Risk Factor: Medium
Base Score: 5.3
Threat Score: 1.3
Threat Vector: CVSS:4.0/E:U
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
Vulnerability Information
CPE: cpe:/a:nginx:nginx
Required KB Items: Settings/ParanoidReport, installed_sw/nginx
Exploit Ease: No known exploits are available
Patch Publication Date: 3/24/2026
Vulnerability Publication Date: 3/24/2026
Reference Information
CVE: CVE-2026-28755