Prototype Pollution
CVE-2024-12556
HIGH
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A03:2021 - Injection
ASVS 5.0
V3 - Web Frontend Security Prototype pollution prevention
MITRE ATT&CK
2 techniques across 2 tactics: Execution, Initial Access The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Impact | CVSS score of 8.7 (HIGH). Attack characteristics: network attack vector, low complexity, low privileges required, user interaction required. EPSS exploitation probability: 1.12%. |
| Exploit ScenarioDerived | A remote attacker could modify object prototypes to inject properties affecting application logic by sending crafted requests to the affected application. |
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Alert meAnalysisAIv1 – Mar 28, 2026
Prototype Pollution in Kibana can lead to code injection via unrestricted file upload combined with path traversal. Rated high severity (CVSS 8.7), this vulnerability is remotely exploitable, low attack complexity. This Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution) vulnerability could allow attackers to modify object prototypes to inject properties affecting application logic.
RemediationAI
A vendor patch is available. Apply the latest security update as soon as possible. Freeze prototypes, validate object keys, avoid recursive merging of untrusted data.
Affects your stack
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Technical ContextAI · show details
This vulnerability is classified as Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution) (CWE-1321), which allows attackers to modify object prototypes to inject properties affecting application logic. Prototype Pollution in Kibana can lead to code injection via unrestricted file upload combined with path traversal. Affected products include: Elastic Kibana.
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- Exploit and PoC references, threat intelligence from 22 sources
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Severity by source
AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
Lifecycle Timeline
2DescriptionCVE.org
Prototype Pollution in Kibana can lead to code injection via unrestricted file upload combined with path traversal.
Executive ViewAI
CVE-2024-12556 presents significant security risk, a prototype pollution vulnerability rated CVSS 8.7. Successful exploitation could significantly impact the confidentiality, integrity, or availability of affected systems. A patch is available and should be applied as part of regular vulnerability management.
Apply vendor patch. If immediate patching is not feasible: (1) Implement network-level access controls to limit exposure; (2) Enable enhanced monitoring and alerting; (3) Apply principle of least privilege.
Threat Intelligence Overview
NVD
CVE.org
EPSS
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Path traversal exploits occur when applications use user-controlled input to construct file system paths without proper validation.
Malicious file upload attacks exploit insufficient validation when web applications accept user-provided files.
Affected Products (CPE)CVE.org
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This affects the package vm2 before 3.9.4 via a Prototype Pollution attack vector, which can lead to execution of arbitr
Prototype Pollution in chargeover redoc v2.0.9-rc.69 allows attackers to execute arbitrary code or cause a Denial of Ser
alizeait unflatto <= 1.0.2 was discovered to contain a prototype pollution via the method exports.unflatto at /dist/inde
GitHub PoC
Exploit-DB