Review reviewHigh

CVE-2026-32141

WebReflection flatted, Cluster Observability Operator 1.5.0, Red Hat Developer Hub 1.8

flatted is a circular JSON parser. Prior to 3.4.0, flatted's parse() function uses a recursive revive() phase to resolve circular references in deserialized JSON. When given a crafted payload with deeply nested or self-referential $ indices, the recursion depth is unbounded, causing a stack overflow that crashes the Node.js process. This vulnerability is fixed in 3.4.0.

CVSS: 7.5
EPSS: 0.81%
CISA KEV: Not listed
Published: 2026.03.13

PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV

Exploit probability0.81%

Technical severityCVSS 7.5

Vulnerability overview

Affected product and versions

Product: WebReflection flatted, Cluster Observability Operator 1.5.0, Red Hat Developer Hub 1.8
Affected versions: >= < 3.4.0, < 3.4.0
Fixed versions: 3.4.0

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide

1
Identify
Confirm that WebReflection flatted, Cluster Observability Operator 1.5.0, Red Hat Developer Hub 1.8 and an affected version are present.
2
Prioritize
Combine exploitation signals with asset exposure and business criticality.
3
Remediate
Follow the vendor advisory or supported update path and preserve rollback options.
4
Verify
Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE: CWE-674, CWE-770