Vulnerability-Lookup

CVE-2026-18948 (GCVE-0-2026-18948)

Vulnerability from cvelistv5 – Published: 2026-08-10 20:44 – Updated: 2026-09-28 09:48

Title

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

Summary

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.

Severity

9.9 (Critical)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-11 13:40 UTC

CWE

CWE-502 - Deserialization of Untrusted Data

Assigner

redhat CNA under the redhat root

CNA scorecard B 82/100 over 1212 records in the last 180 days details

References

6 references

URL	Tags
https://access.redhat.com/errata/RHSA-2026:53261	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:53262	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:53263	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:60520	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-18948	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2511167	issue-trackingx_refsource_REDHAT

Impacted products

5 products

Vendor	Product	Version
Red Hat	Red Hat OpenShift AI 2.25	Unaffected: 1786110051 , < * (rpm) cpe:/a:redhat:openshift_ai:2.25::el9
Red Hat	Red Hat OpenShift AI 3.3	Unaffected: 1786110033 , < * (rpm) cpe:/a:redhat:openshift_ai:3.3::el9
Red Hat	Red Hat OpenShift AI 3.4	Unaffected: 1786107278 , < * (rpm) cpe:/a:redhat:openshift_ai:3.4::el9
Red Hat	Red Hat OpenShift AI 3.4	Unaffected: 1787068065 , < * (rpm) cpe:/a:redhat:openshift_ai:3.4::el9
Red Hat	Red Hat OpenShift AI (RHOAI)	cpe:/a:redhat:openshift_ai

Date Public

2026-08-10 18:52

Show details on NVD website

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}

FKIE_CVE-2026-18948

Vulnerability from fkie_nvd - Published: 2026-08-10 21:17 - Updated: 2026-09-28 10:16

Severity

9.9 (Critical) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Summary

References

	URL	Tags
	secalert@redhat.com	https://access.redhat.com/errata/RHSA-2026:53261
	secalert@redhat.com	https://access.redhat.com/errata/RHSA-2026:53262
	secalert@redhat.com	https://access.redhat.com/errata/RHSA-2026:53263
	secalert@redhat.com	https://access.redhat.com/errata/RHSA-2026:60520
	secalert@redhat.com	https://access.redhat.com/security/cve/CVE-2026-18948
	secalert@redhat.com	https://bugzilla.redhat.com/show_bug.cgi?id=2511167

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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            "cpe:/a:redhat:openshift_ai"
          ],
          "defaultStatus": "unaffected",
          "packageName": "rhoai/odh-workbench-jupyter-datascience-cpu-py312-rhel9",
          "product": "Red Hat OpenShift AI (RHOAI)",
          "vendor": "Red Hat"
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:openshift_ai"
          ],
          "defaultStatus": "unaffected",
          "packageName": "rhoai/odh-workbench-jupyter-pytorch-cuda-py312-rhel9",
          "product": "Red Hat OpenShift AI (RHOAI)",
          "vendor": "Red Hat"
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:openshift_ai"
          ],
          "defaultStatus": "unaffected",
          "packageName": "rhoai/odh-workbench-jupyter-pytorch-llmcompressor-cuda-py312-rhel9",
          "product": "Red Hat OpenShift AI (RHOAI)",
          "vendor": "Red Hat"
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
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          "packageName": "rhoai/odh-workbench-jupyter-pytorch-rocm-py312-rhel9",
          "product": "Red Hat OpenShift AI (RHOAI)",
          "vendor": "Red Hat"
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:openshift_ai"
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          "vendor": "Red Hat"
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          "product": "Red Hat OpenShift AI (RHOAI)",
          "vendor": "Red Hat"
        }
      ],
      "source": "secalert@redhat.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A flaw was found in Feast. The system improperly deserializes user-defined functions (UDFs) stored in its registry, which are serialized using the \u0027dill\u0027 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."
    }
  ],
  "id": "CVE-2026-18948",
  "lastModified": "2026-09-28T10:16:44.017",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.9,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.1,
        "impactScore": 6.0,
        "source": "secalert@redhat.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-18948",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-08-11T13:40:50.474434Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-08-10T21:17:21.290",
  "references": [
    {
      "source": "secalert@redhat.com",
      "url": "https://access.redhat.com/errata/RHSA-2026:53261"
    },
    {
      "source": "secalert@redhat.com",
      "url": "https://access.redhat.com/errata/RHSA-2026:53262"
    },
    {
      "source": "secalert@redhat.com",
      "url": "https://access.redhat.com/errata/RHSA-2026:53263"
    },
    {
      "source": "secalert@redhat.com",
      "url": "https://access.redhat.com/errata/RHSA-2026:60520"
    },
    {
      "source": "secalert@redhat.com",
      "url": "https://access.redhat.com/security/cve/CVE-2026-18948"
    },
    {
      "source": "secalert@redhat.com",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2511167"
    }
  ],
  "sourceIdentifier": "secalert@redhat.com",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-502"
        }
      ],
      "source": "secalert@redhat.com",
      "type": "Primary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-502"
        }
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary"
    }
  ]
}

GHSA-GG2P-37PV-V7FQ

Vulnerability from github – Published: 2026-08-10 21:32 – Updated: 2026-11-03 16:23

Summary

Feast vulnerable to arbitrary code execution via unsafe deserialization of dill-serialized UDFs

Details

Severity

9.9 (Critical)


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

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "feast"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.67.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-18948"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-502"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-11-03T16:23:45Z",
    "nvd_published_at": "2026-08-10T21:17:21Z",
    "severity": "CRITICAL"
  },
  "details": "A flaw was found in Feast. The system improperly deserializes user-defined functions (UDFs) stored in its registry, which are serialized using the \u0027dill\u0027 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.",
  "id": "GHSA-gg2p-37pv-v7fq",
  "modified": "2026-11-03T16:23:45Z",
  "published": "2026-08-10T21:32:07Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-18948"
    },
    {
      "type": "WEB",
      "url": "https://github.com/feast-dev/feast/issues/6827"
    },
    {
      "type": "WEB",
      "url": "https://github.com/feast-dev/feast/pull/6861"
    },
    {
      "type": "WEB",
      "url": "https://github.com/feast-dev/feast/commit/e0ef16ea1ed149ecd5dc9d4d0aa0fdbfa547f861"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:53261"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:53262"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:53263"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:60520"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/CVE-2026-18948"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2511167"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/feast-dev/feast"
    },
    {
      "type": "WEB",
      "url": "https://github.com/feast-dev/feast/releases/tag/v0.67.0"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Feast vulnerable to arbitrary code execution via unsafe deserialization of dill-serialized UDFs"
}

RHSA-2026:53261

Vulnerability from csaf_redhat - Published: 2026-08-11 04:26 - Updated: 2026-11-09 12:08

Summary

Red Hat Security Advisory: RHOAI 2.25.10 - Red Hat OpenShift AI

Severity

Critical

Scope

18 vulnerabilities in this advisory, including CVE-2026-18948.

CVE-2026-18948

9.9 (Critical)


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

Fixed: 3 products Known not affected: 84 products

https://access.redhat.com/errata/RHSA-2026:53261

Open the full advisory

RHSA-2026:53262

Vulnerability from csaf_redhat - Published: 2026-08-11 04:32 - Updated: 2026-11-09 12:08

Summary

Red Hat Security Advisory: RHOAI 3.4.3 - Red Hat OpenShift AI

Severity

Critical

Scope

20 vulnerabilities in this advisory, including CVE-2026-18948.

CVE-2026-18948

9.9 (Critical)


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

Fixed: 3 products Known not affected: 129 products

https://access.redhat.com/errata/RHSA-2026:53262

Open the full advisory

RHSA-2026:53263

Vulnerability from csaf_redhat - Published: 2026-08-11 04:39 - Updated: 2026-10-22 05:58

Summary

Red Hat Security Advisory: RHOAI 3.3.6 - Red Hat OpenShift AI

Severity

Critical

Scope

18 vulnerabilities in this advisory, including CVE-2026-18948.

CVE-2026-18948

9.9 (Critical)


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

Fixed: 3 products Known not affected: 94 products

https://access.redhat.com/errata/RHSA-2026:53263

Open the full advisory

RHSA-2026:60520

Vulnerability from csaf_redhat - Published: 2026-08-27 14:50 - Updated: 2026-11-13 20:13

Summary

Red Hat Security Advisory: RHOAI 3.4.4 - Red Hat OpenShift AI

Severity

Critical

Scope

143 vulnerabilities in this advisory, including CVE-2026-18948.

CVE-2026-18948

9.9 (Critical)


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

Fixed: 3 products Known not affected: 318 products

https://access.redhat.com/errata/RHSA-2026:60520

Open the full advisory

Workarounds

CNA · redhat

Configure Feast to enforce `auth.type: kubernetes` in the operator-generated configuration and deny registry writes by default. This measure limits the attack surface by requiring proper authentication and authorization for registry modifications, preventing the deserialization of malicious user-defined functions.

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

Order JSON

How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

Publication & reservation Sightings KEV catalogs Other timestamps

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2026-18948 (GCVE-0-2026-18948)

FKIE_CVE-2026-18948

GHSA-GG2P-37PV-V7FQ

RHSA-2026:53261

RHSA-2026:53262

RHSA-2026:53263

RHSA-2026:60520

Workarounds

Tags

Sightings

Nomenclature

Vulnerability timeline

Related by attack behaviour