CVE-2020-37280 cbor-sync through 1.0.4 Memory Exhaustion via Unchecked CBOR Array Lengths
Remote attackers can cause denial of service by sending crafted CBOR payloads that trigger excessive memory and CPU consumption in the cbor-sync library.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2020-37280?
CVE-2020-37280 is a high-severity denial of service vulnerability in PelionIoT cbor-sync, published on 12 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-789
Which versions are affected by CVE-2020-37280?
How do I fix CVE-2020-37280?
No fix has been published for CVE-2020-37280 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2020-37280 being exploited?
There is no known exploitation of CVE-2020-37280 in the wild and no public exploit code.
Sources
Also known as GHSA-fpg7-639f-4v49.