CVE-2026-5758 | Mafintosh Protocol-buffers-schema parser up to 3.6.0 code injection

VDB-357762 · CVE-2026-5758 · GCVE-0-2026-5758 MAFINTOSH PROTOCOL-BUFFERS-SCHEMA PARSER UP TO 3.6.0 CODE INJECTION HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 6.0 $0-$5k 2.51+ Summaryinfo A vulnerability was found in Mafintosh Protocol-buffers-schema parser up to 3.6.0. It has been declared as critical. This impacts an unknown function. The manipulation results in code injection. This vulnerability is reported as CVE-2026-5758. The attack can be launched remotely. No exploit exists. It is recommended to upgrade the affected component. Detailsinfo A vulnerability, which was classified as critical, was found in Mafintosh Protocol-buffers-schema parser up to 3.6.0. Affected is some unknown processing. The manipulation with an unknown input leads to a code injection vulnerability. CWE is classifying the issue as CWE-94. The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes: 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. The advisory is available at github.com. This vulnerability is traded as CVE-2026-5758 since 04/07/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1059 by the MITRE ATT&CK project. Upgrading to version 3.6.1 eliminates this vulnerability. Productinfo Vendor Mafintosh Name Protocol-buffers-schema parser Version 3.0 3.1 3.2 3.3 3.4 3.5 3.6.0 CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 6.3 VulDB Meta Temp Score: 6.0 VulDB Base Score: 6.3 VulDB Temp Score: 6.0 VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Code injection CWE: CWE-94 / CWE-74 / CWE-707 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Status: Not defined 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: Protocol-buffers-schema parser 3.6.1 Timelineinfo 04/07/2026 CVE reserved 04/15/2026 +8 days Advisory disclosed 04/15/2026 +0 days VulDB entry created 04/15/2026 +0 days VulDB entry last update Sourcesinfo Advisory: github.com Status: Confirmed CVE: CVE-2026-5758 (🔒) GCVE (CVE): GCVE-0-2026-5758 GCVE (VulDB): GCVE-100-357762 Entryinfo Created: 04/15/2026 19:56 Changes: 04/15/2026 19:56 (54) Complete: 🔍 Cache ID: 99:4C7:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸