Is this vulnerability remotely exploitable over the internet?

Yes, if the host running act exposes the cache server to the internet (for example, via a public IP with open ports or port forwarding), remote attackers can connect and interact with the cache service. If it is strictly bound to localhost and protected by host firewalls, the risk is limited to local or privileged users.

What level of access does an attacker need to exploit this?

The attacker only needs network-level access to the cache server's port. No credentials, tokens, or prior authentication are required. In many default or misconfigured setups, this may include any user on the same network segment, VPN, or—if the port is exposed—anyone on the internet.

What is the safest general fix pattern for this type of issue?

The most robust pattern is to ensure internal services: - are bound to loopback or tightly controlled interfaces, - enforce explicit authorization checks on every state-changing or data-accessing operation, and - avoid assuming that "development" or "local" tools are inherently isolated. Applying these patterns ensures that only trusted, authenticated clients can read or modify cache entries.

Severity:

HIGH RISK

(8.2)

Missing Authorization on Cache Service (CWE-862) in act GitHub Actions Runner

CVE-2026-34042

Published:

Mar 30, 2026

Status:

Awaiting Analysis

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

NDV

Recent Vulnerabilities

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setGameSpeedCfg CGI Handler

Remote Code Execution on the Router

April 6, 2026

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setFirewallType Handler

Remote Code Execution on Router Firmware

April 6, 2026

Vulnerability Type

Category:

Missing Authorization

CWE:

CWE-862

Impact:

Remote Code Execution via Cache Poisoning

Severity:

HIGH RISK

(8.2)

CVSS Version:

3.1

Vulnerability Type

Category:

Missing Authorization

CWE:

CWE-862

Impact:

Remote Code Execution via Cache Poisoning

Severity:

HIGH RISK

(8.2)

CVSS Version:

3.1

Catch This CVE While Code Is Being Written

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Ask AI for summary of CodeAnt

Missing Authorization on Cache Service (CWE-862) in act GitHub Actions Runner

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

Recent Vulnerabilities

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setGameSpeedCfg CGI Handler

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setFirewallType Handler

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

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