Resource exhaustion in Webreflection Flatted
CVE-2026-32141
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.010 (61.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 61st percentile — 61.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.008 · newest: 0.010 · change: +0.002
Affected products
- Webreflection Flatted — versions < 3.4.0
Weakness classification (CWE)
References
- github.com/WebReflection/flatted/security/advisories/GHSA-25h7-pfq9-p65f (Exploit, Patch, Vendor Advisory)
- github.com/WebReflection/flatted/pull/88 (Patch, Issue Tracking)
- github.com/WebReflection/flatted/commit/7eb65d857e1a40de11c47461cdbc8541449f0606 (Patch)
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Frequently asked questions
- What is CVE-2026-32141?
- CVE-2026-32141 is a high-severity vulnerability in Webreflection Flatted, classified under Uncontrolled Recursion. CVSS score: 7.5/10. Published 2026-03-12.
- How severe is CVE-2026-32141?
- High severity. CVSS v3 base score is 7.5 out of 10.