Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1000 CNY

100.0%
Buy Us a Coffee

CVE-2026-27642— free5GC has Improper Input Validation in UDM UEAU Service

EPSS 0.10% · P27
Get alerts for future matching vulnerabilitiesLog in to subscribe

I. Basic Information for CVE-2026-27642

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
free5GC has Improper Input Validation in UDM UEAU Service
Source: NVD (National Vulnerability Database)
Vulnerability Description
free5gc UDM provides Unified Data Management (UDM) for free5GC, an open-source project for 5th generation (5G) mobile core networks. In versions up to and including 1.4.1, remote attackers can inject control characters (e.g., %00) into the supi parameter, triggering internal URL parsing errors (net/url: invalid control character). This exposes system-level error details and can be used for service fingerprinting. All deployments of free5GC using the UDM Nudm_UEAU service may be affected. free5gc/udm pull request 75 contains a fix for the issue. No direct workaround is available at the application level. Applying the official patch is recommended.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
输入验证不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
free5GC 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
free5GC是free5GC开源的一个第 5 代 (5G) 移动核心网络的开源项目。 free5GC 1.4.1及之前版本存在输入验证错误漏洞，该漏洞源于supi参数中可注入控制字符，可能导致系统级错误详情泄露。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
free5gcudm <= 1.4.1 -

II. Public POCs for CVE-2026-27642

#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-27642

请登录查看更多情报信息。

Same Patch Batch · free5gc · 2026-02-24 · 6 CVEs total

CVE-2026-26025free5GC SMF crash (nil pointer dereference) on PFCP SessionReportRequest when ReportType.U
CVE-2026-26024free5GC SMF crash (nil pointer dereference) on PFCP SessionReportRequest when ReportType.U
CVE-2026-25501free5GC SMF crash (nil pointer dereference) on PFCP SessionReportRequest when ReportType.D
CVE-2026-27643free5GC has improper error handling in NEF with information exposure
CVE-2025-69253free5GC vulnerable to improper error handling in NEF with information exposure

IV. Related Vulnerabilities

Same product: udm
Same vendor: free5gc
Same weakness: CWE-20

V. Comments for CVE-2026-27642

No comments yet

Leave a comment