What is the CVSS score of CVE-2025-26278?

CVE-2025-26278 has a CVSS 3.1 base score of 7.5 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. EPSS exploitation probability: 0.1%.

Which versions of Prototype Pollution are affected by CVE-2025-26278?

Organizations using the lib.set function of dref face notable risk from CVE-2025-26278, a prototype pollution vulnerability rated CVSS 7.5.

Is there a public PoC exploit available for CVE-2025-26278?

Yes, a public proof-of-concept exploit is available for CVE-2025-26278. Prioritise patching immediately. EPSS: 0.1%.

How to fix or mitigate CVE-2025-26278?

Within 7 days: Identify all affected systems running the lib.set function of dref and apply vendor patches promptly. Monitor vendor channels for patch availability.

Prototype Pollution CVE-2025-26278

HIGH

Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution) (CWE-1321)

2025-09-25 cve@mitre.org

Denial Of Service Prototype Pollution

7.5

CVSS 3.1

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 19:14 vuln.today

PoC Detected

Sep 26, 2025 - 14:32 vuln.today

Public exploit code

CVE Published

Sep 25, 2025 - 14:15 nvd

HIGH 7.5

Blast Radius

ecosystem impact

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

23 npm packages depend on dref (4 direct, 20 indirect)

Ecosystem-wide dependent count for version 0.1.2.

DescriptionNVD

A prototype pollution in the lib.set function of dref v0.1.2 allows attackers to cause a Denial of Service (DoS) via supplying a crafted payload.

AnalysisAI

A prototype pollution in the lib.set function of dref v0.1.2 allows attackers to cause a Denial of Service (DoS) via supplying a crafted payload. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

Technical ContextAI

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. A prototype pollution in the lib.set function of dref v0.1.2 allows attackers to cause a Denial of Service (DoS) via supplying a crafted payload.

Affected ProductsAI

See vendor advisory for affected versions.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Freeze prototypes, validate object keys, avoid recursive merging of untrusted data.

CVE-2025-26278 vulnerability details – vuln.today

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Prototype Pollution CVE-2025-26278

CVSS VectorNVD

Lifecycle Timeline

Blast Radius

DescriptionNVD

AnalysisAI

Technical ContextAI

Affected ProductsAI

RemediationAI

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External POC / Exploit Code