CVE-2026-33532
yaml: yaml: Denial of Service via deeply nested YAML document parsing
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · March 27, 2026
Updated · October 27, 2026
Description
A flaw was found in yaml, a YAML parser and serializer for JavaScript. An attacker who can supply a specially crafted, deeply nested YAML document for parsing can trigger a RangeError due to a stack overflow. This can lead to a Denial of Service (DoS) by exhausting the call stack, potentially causing the application to fail requests or terminate the Node.js process.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
CVSS / CWE
CVSS 3.1 · 6.5CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-606 · Unchecked Input for Loop Condition