Vulnerability in Pelioniot Cbor-Sync
CVE-2020-37280
cbor-sync through 1.0.4 contains a resource exhaustion vulnerability in CBOR.decode that trusts declared array and map lengths without checking remaining input. Remote attackers can supply a tiny crafted CBOR payload declaring huge lengths to drive billions of iterations, exhausting CPU and process memory.
Published .
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
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/PelionIoT/cbor-sync/pull/4 (issue-tracking, patch)
- github.com/PelionIoT/cbor-sync/issues/6 (issue-tracking)
- github.com/PelionIoT/cbor-sync (product)
- www.vulncheck.com/advisories/cbor-sync-through-1.0.4-memory-exhaustion-via-unch… (third-party-advisory)
Frequently asked questions
- What is CVE-2020-37280?
- CVE-2020-37280 is a high-severity vulnerability in Pelioniot Cbor-Sync, classified under CWE-789. CVSS score: 7.5/10. Published 2026-10-12.
- How severe is CVE-2020-37280?
- High severity. CVSS v3 base score is 7.5 out of 10.