Detections
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Echo: re2c: security update to 4.1-1+e1

medium Tenable Cloud Security Plugin ID 463808

Description

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

 - A flaw has been found in skvadrik re2c up to 4.4. Impacted is the function check_and_merge_special_rules
 of the file src/parse/ast.cc. This manipulation causes null pointer dereference. The attack can only be
 executed locally. The exploit has been published and may be used. Patch name:
 febeb977936f9519a25d9fbd10ff8256358cdb97. It is suggested to install a patch to address this issue.
 (CVE-2026-2903)

Solution

Update the re2c library and its related packages to version 4.1-1+e1 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-2903

Plugin Details

Severity: Medium

ID: 463808

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: Low

Score: 1.2

Percentile: 0.01

CVSS v2

Risk Factor: Low

Base Score: 1.7

Temporal Score: 1.3

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

CVSS Score Source: CVE-2026-2903

CVSS v3

Risk Factor: Low

Base Score: 3.3

Temporal Score: 2.9

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

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

CVSS v4

Risk Factor: Medium

Base Score: 4.8

Threat Score: 1.9

Threat Vector: CVSS:4.0/E:P

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

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 3/25/2026

Vulnerability Publication Date: 2/22/2026

Reference Information

CVE: CVE-2026-2903