How broadly exploitable is this vulnerability?

Exploitation is limited to local users; an attacker must already have a non-privileged account on the system and the ability to run processes that interact with CUPS over localhost. It is not a remote network exploit in typical configurations.

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

The attacker needs only standard local user privileges. No prior administrative access is required, but they must be able to start a service listening on localhost and interact with the CUPS daemon so that it sends a reusable local authorization token.

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

The safest pattern is to redesign local authentication so that bearer-style tokens are tightly scoped to a specific, authenticated peer and cannot be forwarded or reused. Administrative endpoints should require robust, explicit authentication and should not depend solely on localhost assumptions or generic local tokens.

Severity:

HIGH RISK

(7.8)

Authentication Bypass via Local Token Misuse (CWE-287) in OpenPrinting CUPS Admin Interface

CVE-2026-34990

Published:

Apr 3, 2026

Status:

Analyzed

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

NDV

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Remote Code Execution by authenticated users via malicious file upload

May 10, 2026

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Remote Code Execution by Authenticated Users

May 10, 2026

Vulnerability Type

Category:

Authentication Bypass

CWE:

CWE-287

Impact:

Local Privilege Escalation to Root via Arbitrary File Overwrite

Severity:

HIGH RISK

(7.8)

CVSS Version:

3.1

Vulnerability Type

Category:

Authentication Bypass

CWE:

CWE-287

Impact:

Local Privilege Escalation to Root via Arbitrary File Overwrite

Severity:

HIGH RISK

(7.8)

CVSS Version:

3.1

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Authentication Bypass via Local Token Misuse (CWE-287) in OpenPrinting CUPS Admin Interface

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

(8.8)

PHP Code Injection via File Upload (CWE-94) in Aero CMS Admin Post Creation

HIGH RISK

HIGH

(8.8)

Code Injection (CWE-94) via Module Parameters in Evolution CMS

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

Ship clean & secure code faster

Ship clean & secure code faster

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