Detections
Analytics

SCA: security update for github.com/nektos/act (GHSA-xmgr-9pqc-h5vw)

high Tenable Self-Hosted Container Security Plugin ID 439585

Description

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

 - act is a project which allows for local running of github actions. Prior to version 0.2.86, act
 unconditionally processes the deprecated ::set-env:: and ::add-path:: workflow commands, which was
 disabled due to environment injection risks. When a workflow step echoes untrusted data to stdout, an
 attacker can inject these commands to set arbitrary environment variables or modify the PATH for all
 subsequent steps in the job. This issue has been patched in version 0.2.86. (CVE-2026-34041)

Solution

Update the github.com/nektos/act library and its related packages to version 0.2.86 or later.

See Also

https://github.com/advisories/GHSA-xmgr-9pqc-h5vw

Plugin Details

Severity: High

ID: 439585

Version: Revision 1.7

Type: Local

Family: SCA Checks

Published: 4/1/2026

Updated: 7/2/2026

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

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 57.88

Vendor

Vendor Severity: High

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.9

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

CVSS Score Source: CVE-2026-34041

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.8

Vector: CVSS:3.0/AV:N/AC:L/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: High

Base Score: 7.7

Threat Score: 6.8

Threat Vector: CVSS:4.0/E:P

Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/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: 3/27/2026

Vulnerability Publication Date: 3/27/2026

Reference Information

CVE: CVE-2026-34041

cwe: CWE-74