CVE-2026-6993

MEDIUM

go-kratos http.DefaultServeMux Fallback server.go NewServer confused deputy

Title source: cna
STIX 2.1

Description

A security flaw has been discovered in go-kratos kratos up to 2.9.2. This impacts the function NewServer of the file transport/http/server.go of the component http.DefaultServeMux Fallback Handler. The manipulation results in unintended intermediary. The attack may be launched remotely. The exploit has been released to the public and may be used for attacks. The patch is identified as 0284a5bcf92b5a7ee015300ce3051baf7ae4718d. Applying a patch is advised to resolve this issue.

References (7)

Core 7
Core References
Vdb Entry, Technical Description vdb-entry technical-description
VDB-359545 | go-kratos http.DefaultServeMux Fallback server.go NewServer confused deputy
https://vuldb.com/vuln/359545
Signature, Permissions Required signature permissions-required
VDB-359545 | CTI Indicators (IOB, IOC, IOA)
https://vuldb.com/vuln/359545/cti
Third Party Advisory third-party-advisory
Submit #797099 | go-kratos kratos 2.9.2 Unintended Route Exposure via DefaultServeMux Fallback
https://vuldb.com/submit/797099
Exploit exploit issue-tracking
https://github.com/go-kratos/kratos/issues/3810

Scores

CVSS v3 5.3
EPSS 0.0032
EPSS Percentile 22.9%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CISA SSVC

Vulnrichment
Exploitation poc
Automatable yes
Technical Impact partial

Details

CWE
CWE-441
Status published
Products (4)
go-kratos/kratos 0Go
go-kratos/kratos 2.9.0
go-kratos/kratos 2.9.1
go-kratos/kratos 2.9.2
Published Apr 25, 2026
Tracked Since Apr 26, 2026