What is CVE-2026-82856?

CVE-2026-82856 is a critical-severity vulnerability, classified under Improper Access Control. CVSS score: 9.8/10. Published 2026-08-31.

How severe is CVE-2026-82856?

Critical severity. CVSS v3 base score is 9.8 out of 10.

CVE-2026-82856

CVE-2026-82856

@hulumi/policies versions before 1.3.2 fail to properly validate set-qualified AWS IAM condition operators in GitHub OIDC trust policies. Attackers can use ForAnyValue:StringLike operators to hide wildcard GitHub Actions OIDC subject conditions from security guardrails.

EPSS: 0.003 (20.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Weakness classification (CWE)

CWE-284 — Improper Access Control

References

disclosure@vulncheck.com (vendor-advisory)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-82856?: CVE-2026-82856 is a critical-severity vulnerability, classified under Improper Access Control. CVSS score: 9.8/10. Published 2026-08-31.
How severe is CVE-2026-82856?: Critical severity. CVSS v3 base score is 9.8 out of 10.