CVE-2024-27302Public exploitNetwork attack vector

Cross-origin data access via suffix-matched origins

Published Mar 6, 2024 · Updated Aug 5, 2024

CORS authorization bypass in zeromicro go-zero before 1.4.4 allows remote attackers to read or modify data through crafted origins. The rest/internal/cors isOriginAllowed function accepts any origin ending with an allowed string, so not-safe.com matches safe.com without a domain-boundary check. Exposure requires an application to enable the CORS filter with an allowlist, and impact is limited to application endpoints reachable with the browser's user context.

CVSS severity9.1
Critical
EPSS probability0.77%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

CORS authorization bypass in zeromicro go-zero before 1.4.4 allows remote attackers to read or modify data through crafted origins. The rest/internal/cors isOriginAllowed function accepts any origin ending with an allowed string, so not-safe.com matches safe.com without a domain-boundary check. Exposure requires an application to enable the CORS filter with an allowlist, and impact is limited to application endpoints reachable with the browser's user context.

The record

CVE
CVE-2024-27302
Published
Mar 6, 2024
Updated
Aug 5, 2024
Vendor
zeromicro
Product
go-zero
Classifications
CWE-639, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 6, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <1.4.4
  2. Affected versionversion=< 1.4.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

zeromicro · go-zeroversion=0 <1.4.4; version=< 1.4.4

Published CVSS scores

9.1GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-639Authorization Bypass Through User-Controlled Key
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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