CVE-2026-34043

Aliases:GHSA-qj8w-gfj5-8c6v
Advisory lineage Upstream: 0 Downstream: 8
Analyzed
Published: 31 Mar 2026, 01:48
Last modified:31 Mar 2026, 13:55

Vulnerability Summary

Overall Risk (default)
medium
30/100
CVSS Score
7.5 HIGH
v3.1 (nvd)
EPSS Score
0.47% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

31 Mar 2026, 01:48
Published
Vulnerability first disclosed
31 Mar 2026, 13:55
Last Modified
Vulnerability information updated

Description

Serialize JavaScript to a superset of JSON that includes regular expressions and functions. Prior to version 7.0.5, there is a Denial of Service (DoS) vulnerability caused by CPU exhaustion. When serializing a specially crafted "array-like" object (an object that inherits from Array.prototype but has a very large length property), the process enters an intensive loop that consumes 100% CPU and hangs indefinitely. This issue has been patched in version 7.0.5.

CVSS Metrics

  • v3.1•MEDIUM•Score: 5.9CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
  • v3.1•HIGH•Score: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Trends

Current EPSS score: 0.47%• Percentile: 37%

Techniques & Countermeasures

  • CWE-400•Uncontrolled Resource Consumption

    The product does not properly control the allocation and maintenance of a limited resource.

  • CWE-834•Excessive Iteration

    The product performs an iteration or loop without sufficiently limiting the number of times that the loop is executed.

Affected Systems

  • Npm•serialize-javascript

    < 7.0.5 | ≥ 5.0.0, < 7.0.5

  • yahoo•serialize

    < 7.0.5

  • yahoo•serialize-javascript

    < 7.0.5

References (6)