Detections
Analytics

Echo: nginx: security update to 1.26.3-3+deb13u7+e1

high Tenable Self-Hosted Container Security Plugin ID 459760

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_ssi_module module. This
 vulnerability may exist when the Server-Side Includes (SSI), proxy_pass, and proxy_buffering off
 directives are configured. With this configuration, an unauthenticated attacker with man-in-the-middle
 (MITM) ability to control responses from an upstream server may be able to cause a use-after-free in the
 NGINX worker process. This issue may lead to limited modification of memory or a restart of the NGINX
 worker process. Impact: This vulnerability may allow remote attackers to have limited control to modify
 memory contents or restart the NGINX worker process. There is no control plane exposure; this is a data
 plane issue only. Note: Software versions which have reached End of Technical Support (EoTS) are not
 evaluated. (CVE-2026-56434)

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-2026-56434

Plugin Details

Severity: High

ID: 459760

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Medium

Score: 5.5

Percentile: 95.96

CVSS v2

Risk Factor: Medium

Base Score: 6.1

Temporal Score: 4.5

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

CVSS Score Source: CVE-2026-56434

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.7

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS v4

Risk Factor: High

Base Score: 8.3

Threat Score: 4.8

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 7/18/2026

Vulnerability Publication Date: 7/15/2026

Reference Information

CVE: CVE-2026-56434

IAVA: 2026-A-0754