CVE-2024-21909

Name: CVE-2024-21909
Creator: NVD / NIST
Published: 2024-01-03T16:15:09.003+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.06%

Last modified Jun 17, 2026

CVE-2024-21909 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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. EPSS estimates a 1.06% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

1.06%

60.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Peteroupc	Cbor	>= 4.0.0, < 4.5.1

References

https://github.com/advisories/GHSA-6r92-cgxc-r5fgThird Party Advisory
https://github.com/peteroupc/CBOR/commit/b4117dbbb4cd5a4a963f9d0c9aa132f033e15b95Patch
https://github.com/peteroupc/CBOR/compare/v4.5...v4.5.1Release Notes
https://github.com/peteroupc/CBOR/security/advisories/GHSA-6r92-cgxc-r5fgThird Party Advisory
https://vulncheck.com/advisories/vc-advisory-GHSA-6r92-cgxc-r5fgThird Party Advisory
https://github.com/advisories/GHSA-6r92-cgxc-r5fgThird Party Advisory
https://github.com/peteroupc/CBOR/commit/b4117dbbb4cd5a4a963f9d0c9aa132f033e15b95Patch
https://github.com/peteroupc/CBOR/compare/v4.5...v4.5.1Release Notes
https://github.com/peteroupc/CBOR/security/advisories/GHSA-6r92-cgxc-r5fgThird Party Advisory
https://vulncheck.com/advisories/vc-advisory-GHSA-6r92-cgxc-r5fgThird Party Advisory

Timeline

Published: Jan 3, 2024
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2024-21909?

How severe is CVE-2024-21909?

CVE-2024-21909 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.06% probability of exploitation in the next 30 days.

How do I fix CVE-2024-21909?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2024-21909?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST