What is the CVSS score of CVE-2026-5758?

CVE-2026-5758 has a CVSS 3.1 base score of 6.5 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L. EPSS exploitation probability: 0.1%.

Is there a patch available for CVE-2026-5758?

Yes, a patch is available for CVE-2026-5758. Update the affected software to the latest version immediately.

Protocol Buffers Schema Parser CVE-2026-5758

EUVD-2026-22993 MEDIUM

2026-04-15 certcc

RCE Protocol Buffers Schema Parser

6.5

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

6.5 MEDIUM

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

Red Hat

6.5 MEDIUM

qualitative

Primary rating from NVD.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

Low

Lifecycle Timeline

Source Code Evidence Fetched

Jul 26, 2026 - 15:25 vuln.today

Analysis Generated

Jul 26, 2026 - 15:25 vuln.today

Patch released

Apr 17, 2026 - 15:17 nvd

Patch available

Apr 16, 2026 - 05:29 EUVD

3.6.1

CVSS changed

Apr 15, 2026 - 20:22 NVD

6.5 (MEDIUM)

EUVD ID Assigned

Apr 15, 2026 - 17:45 euvd

EUVD-2026-22993

CVE Published

Apr 15, 2026 - 17:20 nvd

MEDIUM 6.5

Blast Radius

ecosystem impact

† from your stack dependencies † transitive graph · vuln.today resolves 4-path depth

23,887 npm packages depend on protocol-buffers-schema (73 direct, 23,823 indirect)

Ecosystem-wide dependent count for version 3.6.1.

DescriptionCVE.org

JavaScript is vulnerable to prototype pollution in Mafintosh's protocol-buffers-schema Version 3.6.0, where an attacker may alter the application logic, bypass security checks, cause a DoS or achieve remote code execution.

AnalysisAI

Prototype pollution in mafintosh's protocol-buffers-schema 3.6.0 allows remote attackers to inject arbitrary properties into JavaScript objects by supplying a malicious protocol buffer schema definition to the parse function. This can lead to application logic manipulation, security check bypass, denial of service, or remote code execution. Public exploit code exists, but no active exploitation has been confirmed by CISA KEV at this time.