Detections
Analytics

Echo: nginx: security update to 1.26.3-3+deb13u10

critical Tenable Cloud Security Plugin ID 477019

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - A vulnerability exists in NGINX Plus and NGINX Open Source when a map directive uses regex matching and
 the root directive or access log format references the map's regex capture variables before referencing
 the map output variable. Alternatively, the same result could be achieved by using a non-cacheable
 variable in a string expression under certain conditions. 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. Impact: This vulnerability may allow remote attackers to cause a denial-of-service (DoS) on
 the NGINX system or to possibly trigger a code execution. 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-2026-93479)

Solution

Update the nginx library and its related packages to version 1.26.3-3+deb13u10 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-93479

Plugin Details

Severity: Critical

ID: 477019

Version: Revision 1.1

Type: Local

Published: 10/23/2026

Updated: 10/23/2026

Risk Information

VPR

Risk Factor: High

Score: 7.9

Percentile: 99.32

CVSS v2

Risk Factor: High

Base Score: 7.6

Temporal Score: 5.6

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

CVSS Score Source: CVE-2026-93479

CVSS v3

Risk Factor: High

Base Score: 8.1

Temporal Score: 7.1

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:U/RL:O/RC:C

CVSS v4

Risk Factor: Critical

Base Score: 9.2

Threat Score: 7.2

Threat Vector: CVSS:4.0/E:U

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 Ease: No known exploits are available

Patch Publication Date: 10/15/2026

Vulnerability Publication Date: 10/14/2026

Reference Information

CVE: CVE-2026-93479

IAVA: 2026-A-1142