Security Flaw in go-kratos Affecting HTTP Server Functionality
CVE-2026-6993

6.9MEDIUM

Key Information:

Vendor

Go-kratos

Status
Kratos
Vendor
CVE Published:
25 April 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-6993?

A security flaw exists in go-kratos up to version 2.9.2 that affects the NewServer function in the transport/http/server.go file. This vulnerability impacts the http.DefaultServeMux Fallback Handler, allowing for unintended intermediary exposure. The vulnerability can be exploited remotely, posing significant security risks. It is crucial to apply the patch identified as 0284a5bcf92b5a7ee015300ce3051baf7ae4718d to mitigate the risks associated with this flaw.

Affected Version(s)

kratos 2.9.0

kratos 2.9.1

kratos 2.9.2

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-6993 - Proof of Concept

References

https://vuldb.com/vuln/359545
vdb-entrytechnical-description
https://vuldb.com/vuln/359545/cti
signaturepermissions-required
https://vuldb.com/submit/797099
third-party-advisory

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Yu_Bao (VulDB User)
.