What is CVE-2026-42205?

CVE-2026-42205 is a high-severity vulnerability in Avo-hq Avo, classified under Improper Access Control. CVSS score: 8.8/10. Published 2026-05-08.

How severe is CVE-2026-42205?

High severity. CVSS v3 base score is 8.8 out of 10.

Auth bypass in Avo-hq Avo

CVE-2026-42205

Avo is a framework to create admin panels for Ruby on Rails apps. Prior to version 3.31.2, a broken access control vulnerability was identified in the ActionsController of the Avo framework. Due to insecure action lookup logic, an authenti…

EPSS: 0.000 (13.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Avo-hq Avo — versions < 3.31.2

Weakness classification (CWE)

CWE-284 — Improper Access Control
CWE-639 — Authorization Bypass Through User-Controlled Key

References

security-advisories@github.com (x_refsource_CONFIRM)
security-advisories@github.com (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-42205?: CVE-2026-42205 is a high-severity vulnerability in Avo-hq Avo, classified under Improper Access Control. CVSS score: 8.8/10. Published 2026-05-08.
How severe is CVE-2026-42205?: High severity. CVSS v3 base score is 8.8 out of 10.