CVSS 3.1
7.5 highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HCVE-2026-32141
High (7.5) in webreflection flatted. EPSS 0.8% chance of exploitation in the next 30 days. Fixed in flatted 3.4.0.
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.
Severity
- EPSS
- 0.8% chance of exploitation in the next 30 days; higher than 57% of CVEs (scores of 2026-10-31)
- CWEs
- CWE-674, CWE-770
- Published
- Modified
- Record from
- the NVD, synced
Affected
- webreflection:flatted
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-25h7-pfq9-p65f | npm | flatted | <3.4.0 | 3.4.0 |
References
- https://github.com/WebReflection/flatted/commit/7eb65d857e1a40de11c47461cdbc8541449f0606
- https://github.com/WebReflection/flatted/pull/88
- https://github.com/WebReflection/flatted/security/advisories/GHSA-25h7-pfq9-p65f
- https://access.redhat.com/errata/RHSA-2026:13826
- https://access.redhat.com/errata/RHSA-2026:21772