# CVE-2024-26134: cbor2: cbor2 provides encoding and decoding for the Concise Binary Object Representation (CBOR) (RFC 8949) serialization format

CVE-2024-26134 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2024-26134, released February 19, 2024. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2024-26134
- Priority: High
- CVSS: 7.5 (high)
- EPSS: 0.0117
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Feb 19, 2024

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | cbor2 Debian 13.5 (trixie) | 5.6.2-1 | [DEBIAN-CVE-2024-26134](https://patchblox.com/security/data/fix/linux/debian-cve-2024-26134.md) | Feb 19, 2024 |
| Linux | cbor2 Debian 14 | 5.6.2-1 | [DEBIAN-CVE-2024-26134](https://patchblox.com/security/data/fix/linux/debian-cve-2024-26134.md) | Feb 19, 2024 |
| Linux | python-cbor2 opensuse-leap 16.0 | 5.6.5-160000.3.1 | [OPENSUSE-SU-2025:20133-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2025-20133-1.md) | Dec 2, 2025 |
| Linux | python-cbor2 sles 16.0 | 5.6.5-160000.3.1 | [SUSE-SU-2025:21168-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-21168-1.md) | Dec 2, 2025 |

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