7.5

CVE-2026-34043: Serialize JavaScript has CPU Exhaustion Denial of Service via crafted array-like objects

Analyzed
AliasesUBUNTU-CVE-2026-34043DEBIAN-CVE-2026-34043CGA-33rf-jqx7-x88q
Published 31-03-2026Last modified 31-03-2026

Vulnerability summary

CVE-2026-34043 is a high (CVSS 7.5) Uncontrolled Resource Consumption vulnerability in yahoo serialize. EPSS estimates a 0.49% chance of exploitation in the next 30 days, higher than 42.2% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 5.9, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
7.5/10
010
High · v3.1 (NVD)
EPSS score
0.49%
0%100%
Low · -0.09 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 6 · Related 1
RHSA-2026:21286RHSA-2026:21291RHSA-2026:21293RHSA-2026:24332RHSA-2026:24334RHSA-2026:24335

Timeline

  1. 31-03-2026
    PublishedVulnerability first disclosed.
  2. 31-03-2026
    Last modifiedVulnerability 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

7 scores · 7 sources · 1 version

EPSS trend

Probability

0.49%

Chance of exploitation in the next 30 days

Percentile

42%

Versus all other CVEs

30-day change

Decrease -0.09 pp

From 0.58% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Chainguard52 products
  • airflow-2All versions (No fix recorded)
  • airflow-core-2All versions (No fix recorded)
  • arangodb-3.11< 3.11.14.5-r4
  • arangodb-3.12< 3.12.11-r1
  • argo-workflows-ui-3.6< 3.6.19-r6
Wolfi14 products
  • argo-workflows-ui-3.7< 3.7.13-r2
  • argo-workflows-ui-4.0< 4.0.4-r6
  • katib-earlystopping< 0.19.0-r31
  • katib-suggestion-goptuna-compatAll versions (No fix recorded)
  • katib-suggestion-hyperband< 0.19.0-r31
Yahoo2 products
Debian1 product
  • node-serialize-javascriptAll versions (No fix recorded) | < 7.0.5+~5.0.4-1
Npm1 product
  • serialize-javascript≥ 5.0.0, < 7.0.5
Ubuntu1 product
  • node-serialize-javascriptAll versions (No fix recorded)

6 vendors · 71 products

References

10 links