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CVE-2025-68131

26
FAUCET Score

CVE-2025-68131 is a high-severity vulnerability affecting the agronholm cbor2 library, versions 3.0.0 through 5.7.x. It allows an unauthenticated attacker to read sensitive data from previously decoded CBOR messages when a CBORDecoder instance is reused across untrusted boundaries. This is due to shareable tag (28) values persisting in memory and being accessible via the sharedref tag (29). The vulnerability has a CVSS score of 7.5 (High), indicating a network-based attack with low complexity and high confidentiality impact, but no integrity or availability impact. Its FAUCET Risk Score is 85/100. There is currently no evidence of active exploitation, and no public exploit code or Metasploit modules are available. Community discussion and media coverage are minimal, which is typical for most CVEs.

Impacted Technologies

VendorProductVersion(s)CPE
>= 3.0.0, < 5.8.0CPE matchmatch criteria
cpe:2.3:a:agronholm:cbor2:*:*:*:*:*:python:*:*

CVSS Data

CVSS version used by this source: 4.0

5.5MEDIUM

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
VS Confidentiality
LOW
VS Integrity
NONE
VS Availability
LOW
SS Confidentiality
NONE
SS Integrity
NONE
SS Availability
NONE
Exploit Maturity
PROOF_OF_CONCEPT
CvssVersion
4.0

Exploit Intelligence

EPSS Score
0.42%
Probability of exploitation in next 30 days
EPSS Percentile
34.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0042 is in the 14th percentile among its peer group of 51,506 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (10)

github_advisorypatch availablevia nvd_reference
View patch
pippatch availablevia ghsa
Product: cbor2Fixed in: 5.8.0
redhatvendor investigatingvia redhat_api
Product: Red Hat OpenShift AI (RHOAI)Fixed in: rhoai/odh-vllm-rocm-rhel9
redhatvendor investigatingvia redhat_api
Product: Red Hat OpenShift AI (RHOAI)Fixed in: rhoai/odh-vllm-cpu-rhel9
redhatvendor investigatingvia redhat_api
Product: Red Hat OpenShift AI (RHOAI)Fixed in: rhoai/odh-vllm-cuda-rhel9
redhatno patchvia redhat_api
Product: Red Hat AI Inference ServerFixed in: rhaiis/vllm-spyre-rhel9
redhatno patchvia redhat_api
Product: Red Hat AI Inference ServerFixed in: rhaiis/vllm-tpu-rhel9
redhatno patchvia redhat_api
Product: Red Hat AI Inference ServerFixed in: rhaiis-preview/vllm-cuda-rhel9
redhatno patchvia redhat_api
Product: Red Hat AI Inference ServerFixed in: rhaiis/vllm-cuda-rhel9
redhatno patchvia redhat_api
Product: Red Hat AI Inference ServerFixed in: rhaiis/vllm-rocm-rhel9

Vendor Advisories (2)

pipGHSA-wcj4-jw5j-44whmedium

CBORDecoder reuse can leak shareable values across decode calls

Dec 31, 2025
redhatCVE-2025-68131Moderate

cbor2: cbor2: Information Disclosure via shared memory in CBORDecoder reuse

Dec 31, 2025

References

github.com / agronholm/cbor2/pull/268
ExploitPatch
github.com / agronholm/cbor2/security/advisories/GHSA-wcj4-jw5j-44wh
ExploitVendor Advisory