CVE-2020-37280CWE-789

CVE-2020-37280

High · published October 13, 2026

CVSS v3.1
7.5
EPSS
1%
Percentile
44.5
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
8.7 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
EPSS
0.00538 · 44.5th percentile
Weakness
CWE-789 · Memory Allocation with Excessive Size Value
Published
2026-10-13T01:17Z
References (4)
https://github.com/PelionIoT/cbor-sync · [email protected]https://github.com/PelionIoT/cbor-sync/issues/6 · [email protected]https://github.com/PelionIoT/cbor-sync/pull/4 · [email protected]https://www.vulncheck.com/advisories/cbor-sync-through-1.0.4-memory-exhaustion-via-unchecked-cbor-array-lengths · [email protected]
EPSS history
Timeline
  • 14 OCT 03:13Z
    EPSS moved — → 1%
    epss
  • 12 OCT 20:55Z
    cbor-sync through 1.0.4 Memory Exhaustion via Unchecked CBOR Array Lengths
    cvelistv5
  • 12 OCT 20:55Z
    cbor-sync through 1.0.4 Memory Exhaustion via Unchecked CBOR Array Lengths
    cvelistv5