CVE-2026-55563CWE-863broken-access-control

CVE-2026-55563

published September 21, 2026

CVSS
8.9
EPSS
0%
Percentile
41.7
In the wild
Unconfirmed
What it is

Feast is the open source feature store for AI and machine learning. Prior to 0.65.0, .github/workflows/pr_integration_tests.yml uses pull_request_target with the synchronize event and preserves ok-to-test, approved, or lgtm labels across newly pushed commits, allowing a fork contributor to obtain approval for a benign revision and then run changed code from refs/pull/${{ github.event.pull_request.number }}/merge through privileged make targets. The job exposes GCP, AWS, and Snowflake credentials to that code, enabling runner code execution, credential disclosure, and possible access to downstream cloud resources. An external label-removal integration could mitigate the condition, but no repository workflow provided that protection. This issue is fixed in version 0.65.0.

The record
Technical detail
CVSS
8.9 · NONE
CVSS v4.0
8.9 · CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
EPSS
0.00497 · 41.7th percentile
Weakness
CWE-863 · Incorrect Authorization
Published
2026-09-21T20:17Z
References (4)
EPSS history
Timeline
  • 23 SEP 03:46Z
    EPSS moved — → 0%
    epss
  • 21 SEP 15:51Z
    Feast: `pull_request_target` integration tests run untrusted fork code with production cloud secrets; the `ok-to-test` label guard is bypassable via label persistence on `synchronize`
    cvelistv5