nodeca js-yaml up to 4.1.0 __proto__ prototype pollution

CVSS Meta Temp Score
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CTI Interest Score
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5.2$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in nodeca js-yaml up to 4.1.0. Affected is the function __proto__. The manipulation leads to prototype pollution. This vulnerability is referenced as CVE-2025-64718. Remote exploitation of the attack is possible. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in nodeca js-yaml up to 4.1.0 and classified as problematic. This issue affects the function __proto__. The manipulation with an unknown input leads to a prototype pollution vulnerability. Using CWE to declare the problem leads to CWE-1321. The product receives input from an upstream component that specifies attributes that are to be initialized or updated in an object, but it does not properly control modifications of attributes of the object prototype. Impacted is integrity. The summary by CVE is:

js-yaml is a JavaScript YAML parser and dumper. In js-yaml before 4.1.1 and 3.14.2, it's possible for an attacker to modify the prototype of the result of a parsed yaml document via prototype pollution (`__proto__`). All users who parse untrusted yaml documents may be impacted. The problem is patched in js-yaml 4.1.1 and 3.14.2. Users can protect against this kind of attack on the server by using `node --disable-proto=delete` or `deno` (in Deno, pollution protection is on by default).

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2025-64718 since 11/10/2025. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1059 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 282602 (TencentOS Server 4: grafana (TSSA-2025:0978)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 4.1.1 eliminates this vulnerability. Applying the patch 383665ff4248ec2192d1274e934462bb30426879 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (282602), EUVD (EUVD-2025-175314) and CERT Bund (WID-SEC-2025-2909). Be aware that VulDB is the high quality source for vulnerability data.

Affected

  • IBM App Connect Enterprise

Productinfo

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.2

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 5.3
CNA Vector (GitHub_M): 🔒

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Prototype pollution
CWE: CWE-1321 / CWE-94 / CWE-74
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 282602
Nessus Name: TencentOS Server 4: grafana (TSSA-2025:0978)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: js-yaml 4.1.1
Patch: 383665ff4248ec2192d1274e934462bb30426879

Timelineinfo

11/10/2025 CVE reserved
11/13/2025 +3 days Advisory disclosed
11/13/2025 +0 days VulDB entry created
01/30/2026 +77 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: GHSA-mh29-5h37-fv8m
Status: Confirmed

CVE: CVE-2025-64718 (🔒)
GCVE (CVE): GCVE-0-2025-64718
GCVE (VulDB): GCVE-100-332375
EUVD: 🔒
CERT Bund: WID-SEC-2025-2909 - IBM App Connect Enterprise: Mehrere Schwachstellen

Entryinfo

Created: 11/13/2025 17:33
Updated: 01/30/2026 00:21
Changes: 11/13/2025 17:33 (66), 11/14/2025 17:37 (1), 12/23/2025 10:18 (7), 01/13/2026 05:39 (2), 01/30/2026 00:21 (1)
Complete: 🔍
Cache ID: 216::103

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