Description

cbor2 provides encoding and decoding for the Concise Binary Object Representation (CBOR) serialization format. Starting in version 3.0.0 and prior to version 5.8.0, whhen a CBORDecoder instance is reused across multiple decode operations, values marked with the shareable tag (28) persist in memory and can be accessed by subsequent CBOR messages using the sharedref tag (29). This allows an attacker-controlled message to read data from previously decoded messages if the decoder is reused across trust boundaries. Version 5.8.0 patches the issue.

INFO

Published Date :

2025-12-31T01:15:36.827Z

Last Modified :

2026-01-02T14:37:55.705Z

Source :

GitHub_M
AFFECTED PRODUCTS

The following products are affected by CVE-2025-68131 vulnerability.

Vendors Products
Agronholm
  • Cbor2
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2025-68131.

URL Resource
https://github.com/agronholm/cbor2/pull/268 cve-icon cve-icon cve-icon
https://github.com/agronholm/cbor2/security/advisories/GHSA-wcj4-jw5j-44wh cve-icon cve-icon cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2025-68131 cve-icon
https://www.cve.org/CVERecord?id=CVE-2025-68131 cve-icon
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CVSS Vulnerability Scoring System

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Detailed values of each vector for above chart.
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