Detections
Analytics
Alpine: multiple nginx packages: security update to 1.28.3-r2
critical Tenable Cloud Security Plugin ID 442343
Description
There are packages installed that are affected by a vulnerability referenced in the following CVE:- NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_rewrite_module module. This
vulnerability exists when a rewrite directive uses a regex pattern with distinct, overlapping Perl-
Compatible Regular Expression (PCRE) captures (for example, ^/((.*))$) and a replacement string that
references multiple such captures (for example, $1$2) in a redirect or arguments context. An
unauthenticated attacker along with conditions beyond their control can exploit this vulnerability by
sending crafted HTTP requests. This may cause a heap buffer overflow in the NGINX worker process leading
to a restart. Additionally, attackers can execute code on systems with Address Space Layout Randomization
(ASLR) disabled or when the attacker can bypass ASLR. Note: Software versions which have reached End of
Technical Support (EoTS) are not evaluated. (CVE-2026-9256)
Solution
Update the nginx library and its related packages to version 1.28.3-r2 or later.See Also
Plugin Details
Severity: Critical
ID: 442343
Version: Revision 1.6
Type: Local
Published: 5/26/2026
Updated: 6/11/2026
Supported Sensors: Agentless Assessment
Risk Information
VPR
Risk Factor: High
Score: 7.4
CVSS v2
Risk Factor: High
Base Score: 7.6
Temporal Score: 6
Vector: CVSS2#AV:N/AC:H/Au:N/C:C/I:C/A:C
CVSS Score Source: CVE-2026-9256
CVSS v3
Risk Factor: High
Base Score: 8.1
Temporal Score: 7.3
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C
CVSS v4
Risk Factor: Critical
Base Score: 9.2
Threat Score: 8.2
Threat Vector: CVSS:4.0/E:P
Vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Vulnerability Information
Exploit Available: true
Exploit Ease: Exploits are available
Vulnerability Publication Date: 5/22/2026
Reference Information
CVE: CVE-2026-9256