ZDF
Sign inSign up

Vulnerabilities

Vulnerability · CVE-2026-33532

is a YAML parser and serialiser for JavaScript.

Published Mar 26, 2026 · catalog updated Jun 17, 2026 · is a YAML parser

Check if you run it

No confirmed exploitation is on record for CVE-2026-33532. EPSS is 0.53%. Act only if a listed version of is a YAML parser is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (is a YAML parser).
  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium4.3
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.53%
Remediation
Advisory link
Affected products
cpe eemeli/yaml

is a YAML parser and serialiser for JavaScript. Parsing a YAML document with a version of on the 1.x branch prior to 1.10.3 or on the 2.x branch prior to 2.8.3 may throw a RangeError due to a stack overflow. The node resolution/composition phase uses recursive function calls without a depth bound. An attacker who can supply YAML for parsing can trigger a with a small payload (~2–10 KB). The is not a , so applications that only catch YAML-specific errors will encounter an unexpected exception type. Depending on the host application's exception handling, this can fail requests or terminate the Node.js process. Flow sequences allow deep nesting with minimal bytes (2 bytes per level: one and one ). On the default Node.js stack, approximately 1,000–5,000 levels of nesting (2–10 KB input) exhaust the call stack. The exact threshold is environment-dependent (Node.js version, stack size, call stack depth at invocation). Note: the library's (CST phase) uses a stack-based iterative approach and is not affected. Only the compose/resolve phase uses actual call-stack recursion. All three public parsing APIs are affected: , , and . Versions 1.10.3 and 2.8.3 contain a patch.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe eemeli/yamlversion unspecified

How to fix CVE-2026-33532

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-33532. EPSS is 0.53%. Act only if a listed version of is a YAML parser is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-674. EPSS 0.53%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Mar 26, 2026 · NIST NVD

    Detected

    is a YAML parser and serialiser for JavaScript. Parsing a YAML document with a version of on the 1.x branch prior to 1.10.3 or on the 2.x branch prior to 2.8.3 may throw a RangeError due to a stack overflow. The node resolution/composition phase uses recursive function calls without a depth bound. An attacker who can supply YAML for parsing can trigger a with a small payload (~2–10 KB). The is not

  2. Jun 17, 2026 · NIST NVD

    Updated

    is a YAML parser and serialiser for JavaScript. Parsing a YAML document with a version of on the 1.x branch prior to 1.10.3 or on the 2.x branch prior to 2.8.3 may throw a RangeError due to a stack overflow. The node resolution/composition phase uses recursive function calls without a depth bound. An attacker who can supply YAML for parsing can trigger a with a small payload (~2–10 KB). The is not

Sources

  • CVE.orgVulnerability recordCVE-2026-33532

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-33532

    30-day exploitation probability 0.5%

    first.org
  • NIST NVDVulnerability recordCVE-2026-33532

    is a YAML parser and serialiser for JavaScript. Parsing a YAML document with a version of on the 1.x branch prior to 1.10.3 or on the 2.x branch prior to 2.8.3 may throw a RangeError due to a stack overflow. The node resolution/composition phase uses recursive funct

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.