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CVE-2020-8158

Status: ModifiedCritical (9.8)—PoC
Severity9.8Critical · CVSS 3.1
Exploitation probability2.12 %higher than 82% of CVEs
Active exploitationNonot in the CISA catalog
Public exploitAvailableProof of concept on GitHub (unverified)

Prototype pollution vulnerability in the TypeORM package < 0.2.25 may allow attackers to add or modify Object properties leading to further denial of service or SQL injection attacks.

CVSS

Base score
9.8
Version
3.1
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days
2.12 %
Percentile among all scored CVEs
82
Score date
10/31/2026

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Public exploits

Exploit code or detection templates are publicly available. This is not the same as confirmed active exploitation (KEV), but it raises the risk: patch with priority.

⚠️ GitHub proofs of concept are not verified: some are fake or contain malware. Never run them outside an isolated lab.

Affected technologies (1)

Typeorm — Typeorm

CWEs

References

Show 2 references

Raw JSON (NVD)

Show
{
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      "value": "Prototype pollution vulnerability in the TypeORM package < 0.2.25 may allow attackers to add or modify Object properties leading to further denial of service or SQL injection attacks."
    },
    {
      "lang": "es",
      "value": "La vulnerabilidad de contaminación del prototipo en el paquete TypeORM versiones anteriores a 0.2.25, puede permitir a atacantes agregar o modificar las propiedades del Objeto, conllevando a nuevos ataques de denegación de servicio o inyección SQL"
    }
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  "lastModified": "2026-06-17T03:25:57.653",
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