EUVD-2026-81050
GHSA-4rxv-8f9g-9h5w
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/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
Unauthenticated network attacker forges a token accepted without signature verification (PR:N/AC:L), gaining full read/write over all server objects and policies, so C:H/I:H/A:H; scope unchanged as impact stays within the feature server.
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
Lifecycle Timeline
3DescriptionCVE.org
Feast through 0.66.0 fails to verify JWT token signatures before establishing user identity, allowing attackers to bypass all role-based access control by presenting an unverified token with a hardcoded claim value. Attackers can obtain trusted internal identity and gain unchecked read and write access to all entities, feature views, data sources, and permission policies on the server.
Articles & Coverage 1
AnalysisAI
Remote unauthenticated attackers can bypass all role-based access control on Feast feature servers (feast-dev/feast) through version 0.66.0 by presenting a forged JWT that the OIDC token parser accepts without verifying its signature, granting the attacker a trusted internal identity and unchecked read and write access to entities, feature views, data sources, and permission policies. Exploitation requires the server to be deployed with OIDC authentication and RBAC authorization enabled; an instance running with no authentication has nothing to bypass, and a properly verifying token path is the intended state. …
Unlock full vulnerability intelligence
- Risk assessment & exploitation conditions
- Attack chain visualization
- Remediation with exact patch versions
- Threat intelligence from 22 sources
- Personal watchlist & email alerts
Free forever · No credit card required
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires that the Feast feature server (feast-dev/feast, versions through 0.66.0) be deployed with OIDC-based authentication and RBAC authorization enabled - the vulnerability is a bypass of that RBAC layer via the OIDC token parser, so an instance running with no auth has nothing to bypass and one with a properly verified auth path is the intended state. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | This is a genuine high-priority issue, not a high-CVSS-but-low-risk paper cut. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | No vendor-released patch has been identified at time of analysis, so operators cannot yet upgrade to a fixed version; the tracking issue at https://github.com/feast-dev/feast/issues/6785 and the advisory at https://www.vulncheck.com/advisories/feast-through-0.66.0-authentication-bypass-via-unverified-token should be monitored for a release. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory every Feast feature server deployment and confirm whether any are running version 0.66.0 with OIDC authentication and RBAC authorization both enabled, as those are the only configurations exposed; where an affected instance is internet-facing or reachable from untrusted networks, remove that reachability immediately and treat all data it has served as potentially tampered. …
Sign in for detailed remediation steps and compensating controls.
Threat intelligence, references, and detailed analysis are available after sign-in.
Wazuh SIEM platform versions 4.4.0 through 4.9.0 contain an unsafe deserialization vulnerability in the DistributedAPI t
BentoML version 1.4.2 and earlier contains an unauthenticated remote code execution vulnerability through insecure deser
pgAdmin 4 contains critical remote code execution vulnerabilities in the Query Tool download and Cloud Deployment endpoi
The renderLocalView function in render/views.py in graphite-web in Graphite 0.9.5 through 0.9.10 uses the pickle Python
BentoML is a Python library for building online serving systems optimized for AI apps and model inference. Rated critica
OpenSSL before 0.9.8za, 1.0.0 before 1.0.0m, and 1.0.1 before 1.0.1h does not properly restrict processing of ChangeCiph
pyLoad download manager version prior to 0.5.0b3.dev77 exposes the Flask SECRET_KEY through an unauthenticated endpoint.
Langflow (a visual LLM pipeline builder) contains a critical unauthenticated code execution vulnerability (CVE-2026-3301
In Mercurial before 4.1.3, "hg serve --stdio" allows remote authenticated users to launch the Python debugger, and conse
Unauthenticated remote code execution affects Kestra OSS (the open-source event-driven orchestration platform) prior to
Unauthenticated remote code execution in Marimo ≤0.20.4 allows attackers to execute arbitrary system commands via the `/
pyLoad is the free and open-source Download Manager written in pure Python. Rated medium severity (CVSS 5.3), this vulne
Same weakness CWE-798 – Use of Hard-coded Credentials
View allSame technique Authentication Bypass
View allShare
External POC / Exploit Code
Leaving vuln.today