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© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2026-34043

27
FAUCET Score

CVE-2026-34043 is a Denial of Service (DoS) vulnerability affecting the 'yahoo serialize' library prior to version 7.0.5. It allows an attacker to trigger CPU exhaustion by serializing a specially crafted "array-like" object, causing the process to enter an intensive, indefinite loop. This high-severity vulnerability (CVSS 7.5) has a low attack complexity and can be exploited remotely, leading to significant availability impact. While it is on a "Hot List" for tracking, there is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 7.0.5CPE matchmatch criteria
cpe:2.3:a:yahoo:serialize:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.9MEDIUM

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.2
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.47%
Probability of exploitation in next 30 days
EPSS Percentile
38.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0047 is in the 17th percentile among its peer group of 51,506 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
npmpatch availablevia ghsa
Product: serialize-javascriptFixed in: 7.0.5

Vendor Advisories (2)

npmGHSA-qj8w-gfj5-8c6vmedium

Serialize JavaScript has CPU Exhaustion Denial of Service via crafted array-like objects

Mar 27, 2026
microsoft2026-Mar/CVE-2026-34043Moderate

Serialize JavaScript has CPU Exhaustion Denial of Service via crafted array-like objects

Mar 10, 2026

References

github.com / yahoo/serialize-javascript/commit/f147e90269b58bb6e539cfdf3d0e20d6ad14204b
Patch
github.com / yahoo/serialize-javascript/releases/tag/v7.0.5
Release Notes
github.com / yahoo/serialize-javascript/security/advisories/GHSA-qj8w-gfj5-8c6v
Vendor Advisory