Detections
Analytics

Echo: nginx: security update to 1.26.3-3+deb13u7+e1nginx-1.30: security update to 1.30.1nginx-1.31: security update to 1.31.0

critical Tenable Cloud Security Plugin ID 460646

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 the rewrite directive is followed by a rewrite, if, or set directive and an
 unnamed Perl-Compatible Regular Expression (PCRE) capture (for example, $1, $2) with a replacement string
 that includes a question mark (?). An unauthenticated attacker along with conditions beyond its 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-2026-42945)

Solution

Update the nginx library and its related packages to version 1.26.3-3+deb13u7+e1 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-42945

Plugin Details

Severity: Critical

ID: 460646

Version: Revision 1.2

Type: Local

Published: 10/2/2026

Updated: 10/5/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Critical

Score: 9.2

Percentile: 99.77

CVSS v2

Risk Factor: High

Base Score: 7.6

Temporal Score: 6.3

Vector: CVSS2#AV:N/AC:H/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2026-42945

CVSS v3

Risk Factor: High

Base Score: 8.1

Temporal Score: 7.5

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:F/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:N/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

Patch Publication Date: 5/14/2026

Vulnerability Publication Date: 5/13/2026

Exploitable With

Core Impact

Reference Information

CVE: CVE-2026-42945