What is CVE-2024-27302?

CVE-2024-27302 is a critical-severity vulnerability in Go-Zero, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 9.1/10. Published 2024-03-06.

How severe is CVE-2024-27302?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Auth bypass in Go-Zero

CVE-2024-27302

go-zero is a web and rpc framework. Go-zero allows user to specify a CORS Filter with a configurable allows param - which is an array of domains allowed in CORS policy. However, the `isOriginAllowed` uses `strings.HasSuffix` to check the origin, which leads to bypass via a malicious domain. This vulnerability is capable of breaking CORS policy and thus allowing any page to make requests and/or retrieve data on behalf of other users. Version 1.4.4 fixes this issue.

Vulnerability class: IDOR (Insecure Direct Object Reference)

Published 2024-03-06 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.008 (54.2th percentile), scored 2026-10-03.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 54th percentile — 54.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

Go-Zero
Zeromicro Go-Zero — versions < 1.4.4

Weakness classification (CWE)

CWE-639 — Authorization Bypass Through User-Controlled Key

References

github.com/zeromicro/go-zero/security/advisories/GHSA-fgxv-gw55-r5fq (Exploit, Vendor Advisory)
github.com/zeromicro/go-zero/commit/d9d79e930dff6218a873f4f02115df61c38b15db (Patch)

Frequently asked questions

What is CVE-2024-27302?: CVE-2024-27302 is a critical-severity vulnerability in Go-Zero, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 9.1/10. Published 2024-03-06.
How severe is CVE-2024-27302?: Critical severity. CVSS v3 base score is 9.1 out of 10.