CVE-2024-26134

Public Exploit
CBOR2 decoder has potential buffer overflow

Description

cbor2 provides encoding and decoding for the Concise Binary Object Representation (CBOR) (RFC 8949) serialization format. Starting in version 5.5.1 and prior to version 5.6.2, an attacker can crash a service using cbor2 to parse a CBOR binary by sending a long enough object. Version 5.6.2 contains a patch for this issue.

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.81% Top 30%
Vendor Advisory github.com
Affected: agronholm cbor2
Published at:
Updated at:

References

Link Tags
https://github.com/agronholm/cbor2/security/advisories/GHSA-375g-39jq-vq7m vendor advisory exploit
https://github.com/agronholm/cbor2/pull/204 issue tracking
https://github.com/agronholm/cbor2/commit/387755eacf0be35591a478d3c67fe10618a6d542 product
https://github.com/agronholm/cbor2/commit/4de6991ba29bf2290d7b9d83525eda7d021873df patch
https://github.com/agronholm/cbor2/releases/tag/5.6.2 release notes
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GX524ZG2XJWFV37UQKQ4LWIH4UICSGEQ/ mailing list
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/BT42VXZMMMCSSHMA65KKPOZCXJEYHNR5/ mailing list
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PWC3VU6YV6EXKCSX5GTKWLBZIDIJNQJY/ mailing list

Frequently Asked Questions

What is the severity of CVE-2024-26134?
CVE-2024-26134 has been scored as a high severity vulnerability.
How to fix CVE-2024-26134?
To fix CVE-2024-26134, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2024-26134 being actively exploited in the wild?
It is possible that CVE-2024-26134 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2024-26134?
CVE-2024-26134 affects agronholm cbor2.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.