agronholm cbor2 up to 5.7.x CBOR Message improper removal of sensitive information before storage or transfer

CVSS Meta Temp Score
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CTI Interest Score
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7.2$0-$5k0.00

Summaryinfo

A vulnerability marked as critical has been reported in agronholm cbor2 up to 5.7.x. This affects an unknown function of the component CBOR Message Handler. Performing a manipulation results in improper removal of sensitive information before storage or transfer. This vulnerability is known as CVE-2025-68131. Remote exploitation of the attack is possible. No exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, was found in agronholm cbor2 up to 5.7.x. This affects an unknown code of the component CBOR Message Handler. The manipulation with an unknown input leads to a improper removal of sensitive information before storage or transfer vulnerability. CWE is classifying the issue as CWE-212. The product stores, transfers, or shares a resource that contains sensitive information, but it does not properly remove that information before the product makes the resource available to unauthorized actors. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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.

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2025-68131 since 12/15/2025. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1592 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 281501 (Linux Distros Unpatched Vulnerability : CVE-2025-68131), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.8.0 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (281501) and EUVD (EUVD-2025-205866). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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Version

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 7.4
VulDB Meta Temp Score: 7.2

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔒

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Improper removal of sensitive information before storage or transfer
CWE: CWE-212 / CWE-200 / CWE-284
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 281501
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2025-68131

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: cbor2 5.8.0
Patch: github.com

Timelineinfo

12/15/2025 CVE reserved
12/31/2025 +16 days Advisory disclosed
12/31/2025 +0 days VulDB entry created
01/03/2026 +3 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: GHSA-wcj4-jw5j-44wh
Status: Confirmed

CVE: CVE-2025-68131 (🔒)
GCVE (CVE): GCVE-0-2025-68131
GCVE (VulDB): GCVE-100-339105
EUVD: 🔒

Entryinfo

Created: 12/31/2025 03:51
Updated: 01/03/2026 04:20
Changes: 12/31/2025 03:51 (68), 12/31/2025 19:14 (1), 01/01/2026 00:29 (1), 01/01/2026 01:09 (2), 01/03/2026 04:20 (11)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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