Public vulnerability disclosure

CVE-2024-21909

Denial of service in CBOR library

publishedCWE-407

PeterO.Cbor versions 4.0.0 through 4.5.0 are vulnerable to a denial of service vulnerability. An attacker may trigger the denial of service condition by providing crafted data to the DecodeFromBytes or other decoding mechanisms in PeterO.Cbor. Depending on the usage of the library, an unauthenticated and remote attacker may be able to cause the denial of service condition.

Technical severity7.5 highCVSS 3.1 · ADP: CISA-ADP
Published2024-01-03Source updated 2026-11-08
Collected2026-11-083 attributed sources

Fixes and workarounds

Fix

The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.

Source: CNA: VulnCheck

Fix

The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.

Source: ADP: CVE

Fix

PeterO.Cbor (NuGet): OSV reports a fixed version 4.5.1. Check the advisory for supported release branches.

Source: OSV GHSA-6r92-cgxc-r5fg

Affected products and versions

Affected products, source version ranges and reporting authorities
ProductVersionsAuthority


PeterO.Cbor
nuget
≥ 4.0.0; < 4.5.1 (affected, semver 2.0.0)
Other versions: unaffected
CNA: VulnCheck
PeterO.Cbor

PeterO.Cbor
NuGet
4.0.0 (affected, NuGet)
4.0.1 (affected, NuGet)
4.1.0 (affected, NuGet)
4.1.1 (affected, NuGet)
4.1.2 (affected, NuGet)
4.1.3 (affected, NuGet)
4.2.0 (affected, NuGet)
4.3.0 (affected, NuGet)
4.4.0 (affected, NuGet)
4.4.1 (affected, NuGet)
4.4.2 (affected, NuGet)
4.4.4 (affected, NuGet)
4.5.0 (affected, NuGet)
Ecosystem version events: introduced 4.0.0; fixed 4.5.1
Source events (ECOSYSTEM)
[
  {
    "introduced": "4.0.0"
  },
  {
    "fixed": "4.5.1"
  }
]

Other versions: unaffected
OSV GHSA-6r92-cgxc-r5fg

Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.

CVSS assessments

CVSS scores, vectors and reporting authorities
Version / scoreVectorAuthority
3.1 / 7.5
high
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HADP: CISA-ADP

Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

References

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