VDB-345037 · CVE-2026-25598 · GHSA-cpmj-h4f6-r6pq

step-security harden-runner up to 2.14.1 insufficient logging

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.2	$0-$5k	0.00

Summaryinfo

A vulnerability was found in step-security harden-runner up to 2.14.1. It has been rated as problematic. Affected by this vulnerability is an unknown functionality. This manipulation causes insufficient logging. This vulnerability is tracked as CVE-2026-25598. The attack is possible to be carried out remotely. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability has been found in step-security harden-runner up to 2.14.1 and classified as problematic. Affected by this vulnerability is an unknown function. The manipulation with an unknown input leads to a insufficient logging vulnerability. The CWE definition for the vulnerability is CWE-778. When a security-critical event occurs, the product either does not record the event or omits important details about the event when logging it. As an impact it is known to affect integrity. The summary by CVE is:

Harden-Runner is a CI/CD security agent that works like an EDR for GitHub Actions runners. Prior to 2.14.2, a security vulnerability has been identified in the Harden-Runner GitHub Action (Community Tier) that allows outbound network connections to evade audit logging. Specifically, outbound traffic using the sendto, sendmsg, and sendmmsg socket system calls can bypass detection and logging when using egress-policy: audit. This vulnerability is fixed in 2.14.2.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-25598 since 02/03/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1562.002 for this issue.

Upgrading to version 2.14.2 eliminates this vulnerability. The upgrade is hosted for download at github.com.

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Productinfo

Vendor

step-security

Name

harden-runner

Version

Website

Product: https://github.com/step-security/harden-runner/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.2

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 5.3
NVD Vector: 🔒

CVSSv2info

AV	AC	Au	C	I	A
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Insufficient logging
CWE: CWE-778
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: harden-runner 2.14.2

Timelineinfo

02/03/2026 CVE reserved
02/09/2026 +6 days Advisory disclosed
02/09/2026 +0 days VulDB entry created
02/28/2026 +19 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: GHSA-cpmj-h4f6-r6pq
Status: Confirmed

CVE: CVE-2026-25598 (🔒)
GCVE (CVE): GCVE-0-2026-25598
GCVE (VulDB): GCVE-100-345037

Entryinfo

Created: 02/09/2026 21:34
Updated: 02/28/2026 01:57
Changes: 02/09/2026 21:34 (67), 02/28/2026 01:57 (11)
Complete: 🔍
Cache ID: 216::103