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Vulnerabilities

Vulnerability · CVE-2026-18948

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

Published Aug 10, 2026 · catalog updated Nov 3, 2026 · Feast vulnerable to arbitrary

Last checked Nov 4, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2026-18948. EPSS is 1.08%. Act only if a listed version of Feast vulnerable to arbitrary is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Feast vulnerable to arbitrary).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Critical9.9
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
1.08%
Remediation
Advisory link
Affected products
PyPI feast

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • PyPI feast0 → 0.67.0

How to fix CVE-2026-18948

  • Upgrade

    CVE-2026-18948 lists a fix boundary at 0.67.0. Compare the installed build with that boundary before you change production.

  • Version check

    Fixed in 0.67.0

  • Advisory

    Open the cve_org record and follow its fix.

  • Official advisories

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-18948. EPSS is 1.08%. Act only if a listed version of Feast vulnerable to arbitrary is installed.

Which versions are affected?

Compare what you have installed with 0 → 0.67.0. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-502: Deserialization of Untrusted Data. EPSS 1.08%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Aug 10, 2026 · PyPA Advisory Database

    Detected

    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 regis

  2. Nov 3, 2026 · PyPA Advisory Database

    Fix available

    feast fixed in 0.67.0

  3. Nov 3, 2026 · PyPA Advisory Database

    Fix available

    feast fixed in 0.67.0

  4. Nov 3, 2026 · PyPA Advisory Database

    Updated

    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 regis

Sources

  • CVE.orgVulnerability recordCVE-2026-18948

    Official CVE identifier

    cve.org
  • PyPA Advisory DatabasePackage advisoryGHSA-gg2p-37pv-v7fq

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

    osv.dev

References

Freshness

Last verified in this catalog Nov 4, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • CVE.orgNov 4, 2026
  • PyPA Advisory DatabaseNov 4, 2026