CVE-2026-53550

js-yaml is a JavaScript YAML parser and dumper. Prior to 4.2.0, a crafted YAML document can trigger algorithmic CPU exhaustion in js-yaml merge-key processing by repeating the same alias many times in a merge sequence. This causes quadratic parse-time behavior relative to input size and can block...

UBUNTU-CVE-2026-53550

js-yaml is a JavaScript YAML parser and dumper. Prior to 4.2.0, a crafted YAML document can trigger algorithmic CPU exhaustion in js-yaml merge-key processing by repeating the same alias many times in a merge sequence. This causes quadratic parse-time behavior relative to input size and can block...

Inefficient Algorithmic Complexity

Overview js-yaml is a human-friendly data serialization language. Affected versions of this package are vulnerable to Inefficient Algorithmic Complexity in the storeMappingPair function in loader.js when handling repeated aliases in merge sequences. An attacker can exhaust CPU resources and...

GHSA-H67P-54HQ-RP68 JS-YAML: Quadratic-complexity DoS in merge key handling via repeated aliases

Summary A crafted YAML document can trigger algorithmic CPU exhaustion in js-yaml merge-key processing by repeating the same alias many times in a merge sequence. This causes quadratic parse-time behavior relative to input size and can block a Node.js worker/event loop for seconds with a relative...

JS-YAML: Quadratic-complexity DoS in merge key handling via repeated aliases

Summary A crafted YAML document can trigger algorithmic CPU exhaustion in js-yaml merge-key processing by repeating the same alias many times in a merge sequence. This causes quadratic parse-time behavior relative to input size and can block a Node.js worker/event loop for seconds with a relative...

PT-2026-49573

Name of the Vulnerable Software and Affected Versions js-yaml versions prior to 4.2.0 Description A crafted YAML document can trigger algorithmic CPU exhaustion during merge-key processing by repeating the same alias multiple times in a merge sequence. This results in quadratic parse-time behavio...

CVE-2026-53550

creationtimestamp| type| source ---|---|--- 2026-05-31 23:39:03+00:00| published-proof-of-concept| https://github.com/nodeca/js-yaml/security/advisories/GHSA-h67p-54hq-rp68...

PraisonAI Vulnerable to Remote Code Execution via YAML Deserialization in Agent Definition Loading

Summary The AgentService.loadAgentFromFile method uses the js-yaml library to parse YAML files without disabling dangerous tags such as !!js/function and !!js/undefined. This allows an attacker to craft a malicious YAML file that, when parsed, executes arbitrary JavaScript code. An attacker can...

Security Bulletin: Multiple security vulnerabilities are addressed with IBM Cloud Pak for Business Automation iFixes for March 2026.

Summary In addition to many updates of operating system level packages, the following security vulnerabilities are addressed with IBM Cloud Pak for Business Automation. Vulnerability Details CVEID:CVE-2025-48924 DESCRIPTION: Uncontrolled Recursion vulnerability in Apache Commons Lang. This issue...

Security Bulletin: Multiple Vulnerabilities in IBM Event Streams

Summary Multiple vulnerabilities were addressed in IBM Event Streams version 12.2.2 Vulnerability Details CVEID:CVE-2025-64718 DESCRIPTION: 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...

Security Bulletin: IBM Watson Discovery Cartridge affected by vulnerability in js-yaml-4.1.0.tgz

Summary IBM Watson Discovery Cartridge affected by vulnerability in js-yaml-4.1.0.tgz Vulnerability Details CVEID:CVE-2025-64718 DESCRIPTION: 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 ...

SUSE-SU-2026:20540-1 Security update for cockpit-repos

This update for cockpit-repos fixes the following issues: Update to version 4.7. Security issues fixed: - CVE-2025-13465: prototype pollution in the .unset and .omit functions can lead to deletion of methods from global bsc1257325. - CVE-2025-64718: js-yaml prototype pollution in merge bsc1255425...

Security Bulletin: IBM Maximo Application Suite uses werkzeug-3.1.3,fonttools-4.60.0-cp311-cp311-manylinux2014_x86_64.manylinux_2_17_x86_64.whl,lodash.clonedeep-4.5.0.tgz,js-yaml-4.1.0.tgz,mdast-util-towhich is vulnerable to multiple CVEs

Summary IBM Maximo Application Suite uses werkzeug-3.1.3-py3-none-any.whl, fonttools-4.60.0-cp311-cp311-manylinux2014x8664.manylinux217x8664.whl, lodash.clonedeep-4.5.0.tgz, js-yaml-4.1.0.tgz, mdast-util-towhich is vulnerable to CVE-2025-66221, CVE-2025-66034, CVE-2018-16487, CVE-2025-64718,...

Security Bulletin: IBM Maximo Application Suite - Manage Component uses js-yaml-4.1.0 in map-application which is vulnerable to CVE-2025-64718

Summary IBM Maximo Application Suite - Manage Component uses js-yaml-4.1.0 in map-application which is vulnerable to CVE-2025-64718. This bulletin contains information regarding the vulnerability and its fixture. Vulnerability Details CVEID:CVE-2025-64718 DESCRIPTION: js-yaml is a JavaScript YAML...

SUSE-SU-2026:20170-1 Security update for cockpit-subscriptions

This update for cockpit-subscriptions fixes the following issues: Update to version 12.1: - CVE-2025-64718: js-yaml: fixed prototype pollution in merge bsc1255425...

SUSE CVE-2025-64718

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...

CVE-2025-64718

js-yaml is a JavaScript YAML parser and dumper. In js-yaml 4.1.0 and below, 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...

EUVD-2025-175314

js-yaml has prototype pollution in merge...

02.aula (=1.0.0), 0xrtest (=1.0.0) +8004 more potentially affected by CVE-2025-64718 via js-yaml (>=4.0.0 <=4.1.0)

js-yaml NPM version =4.0.0, =0.2.0, =0.0.3, =4.11.0, =0.0.1, =0.1.23, =0.1.4, =6.1.5, =0.2.0, =0.2.0, =0.14.0 and more Source cves: CVE-2025-64718 Source advisory: OSV:GHSA-MH29-5H37-FV8M...

GHSA-MH29-5H37-FV8M js-yaml has prototype pollution in merge (<<)

Impact In js-yaml 4.1.0, 4.0.0, and 3.14.1 and below, 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. Patches Problem is patched in js-yaml 4.1.1 and 3.14.2...