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CVE-2026-18948· NVD / CVE Program· CNA redhat

Feast: feast: unsafe dill deserialization of registry-stored udfs — rce on feature server and registry server

A flaw was found in Feast. The system improperly deserializes user-defined functions (UDFs) stored in its registry, which are serialized using the 'dill' library. This allows a remote attacker to store a malicious UDF, leading to unauthenticated arbitrary code execution on the feature server in default configurations. An authenticated attacker can also achieve arbitrary code execution on the registry server by bypassing authorization checks during deserialization. This vulnerability can result in cross-tenant data access and lateral movement within the system.

CriticalCVSS 9.9 · v3.1—No exploit No fix recorded

Noroxi analysis

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Published
Aug 10, 2026
Updated
Sep 28, 2026
EPSS
1.1% · 64th percentile
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Report tools

JSON

Action score

39

Monitor

Low priority for now.

CVSS
39 / 40 · 9.9 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 1.1%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · redhat
9.9
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Affected systems

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (redhat). Independent of NVD's CPE analysis and usually ahead of it.

  • Red Hat Red Hat OpenShift AI (RHOAI)

    • all versionsunknown
    • all versionsunknown
    • all versionsunknown
    • all versionsunknown
    • all versionsunknown
    • all versionsunknown
    • all versionsunknown
    • all versionsunknown
    • all versionsunknown
    • all versionsunknown

  • Red Hat Red Hat OpenShift AI 2.25

    • 1786110051 and laternot affected · rpm

  • Red Hat Red Hat OpenShift AI 3.3

    • 1786110033 and laternot affected · rpm

  • Red Hat Red Hat OpenShift AI 3.4

    • 1786107278 and laternot affected · rpm
    • 1787068065 and laternot affected · rpm

Same product

red hat: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-15378Guardrails-detectors: guardrails-detectors: ssrf and local file read via user-supplied xml schema (xml-with-schema:)
    37Monitor
  • CVE-2026-18982Odh-training-operator-rhel9: rhoai fork aggregates training job create onto native edit/admin clusterroles
    35Monitor
  • CVE-2026-18950Odh-dashboard: odh-dashboard: confused-deputy privilege escalation via unchecked roleref in rolebinding creation
    35Monitor
  • CVE-2026-18949Odh-dashboard: odh-dashboard: clusterrole grants cluster-wide crud on secrets and rbac management resources
    35Monitor
  • CVE-2026-18617Data-science-pipelines-operator: dspo: mysql dsn parameter injection via customextraparams enables local infile file exfiltration from operator pod
    35Monitor
  • CVE-2026-16745Odh-dashboard: odh-dashboard: backend port 8080 trusts x-forwarded-access-token without origin validation
    35Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

—

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

  • CVE-2026-1674518 days apartOdh-dashboard: odh-dashboard: backend port 8080 trusts x-forwarded-access-token without origin validation
    35Monitor
  • CVE-2026-155810 days apartTrustyai-service-operator: trustyai-service-operator: tas internal service bypasses kube-rbac-proxy, exposing unauthenticated quarkus api cluster-wide
    32Monitor
  • CVE-2026-189410 days apartFeast: feast-operator: feast: default authentication mode is no_auth — shared multi-tenant instances deployed without authentication
    30Monitor

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted

Impact can extend beyond the vulnerable component (scope changes).

Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Changed
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-502 · Deserialization of Untrusted Data

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

nvd-secondary

Root cause

Data received over the network is deserialized into the language’s native object format without verifying its source. Code paths inside the object can be triggered during deserialization.

The bug in code

The whole CWE-502 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

python
payload = sock.recv(65536)job = pickle.loads(payload)

Fixed

python
payload = sock.recv(65536)if not hmac.compare_digest(sign(payload), header_sig):    raise PermissionError("invalid signature")job = JobSchema.validate(json.loads(payload))

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

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Change log

  1. SSVC exploitation— → none

For records you follow, these changes also arrive as notifications. →

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records