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VULNERABILITIES

CVE-2025-68131 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:7.5 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://github.com/agronholm/cbor2/security/advisories/GHSA-wcj4-jw5j-44wh CISA-ADPExploitVendor Advisory
https://github.com/agronholm/cbor2/pull/268 [email protected]ExploitPatch
https://github.com/agronholm/cbor2/security/advisories/GHSA-wcj4-jw5j-44wh [email protected]ExploitVendor Advisory

Weakness Enumeration

CWE-IDCWE NameSource
CWE-212Improper Removal of Sensitive Information Before Storage or Transfer[email protected]

Affected Products

ProductVersions
agronholm cbor2
>= 3.0.0, < 5.8.0

CPE

  • cpe:2.3:a:agronholm:cbor2:*:*:*:*:*:python:*:*

Remediation

  • No remediation found in references.

Change History

5 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2025-68131
NVD Published Date:
Dec 31, 2025
NVD Last Modified:
Jun 17, 2026
Source:
[email protected]
CVE-2025-68131 Details - Not Deferred