PatchTheCVECVE-2026-32141: flatted is a circular JSON parser
CVE-2026-32141 is a high-severity flaw (CVSS 7.5) affecting flatted. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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.
Why this priority
- High severity
- Public exploit reference
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Last updated 2026-09-04 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-32141?
flatted: upgrade to 3.4.0. Exact commands for each OS are on this page.
Is CVE-2026-32141 being exploited?
CVE-2026-32141 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-32141 affect?
CVE-2026-32141 affects flatted. Severity is high (CVSS 7.5). 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
How urgent is CVE-2026-32141?
Priority 51/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action
Software pages
Related CVEs
- CVE-2026-33228 CRITICAL 9.8 UPGRADE flatted is a circular JSON parser