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

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-33192— free5GC UDM incorrectly returns 500 for empty supi path parameter in PATCH sdm-subscriptions reques

Quick assessment

Affected
free5gc free5gc
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

free5GC是free5GC开源的一个第 5 代 (5G) 移动核心网络的开源项目。 free5GC 1.4.2之前版本存在安全漏洞，该漏洞源于UDM在处理具有空supi路径参数的PATCH请求时，错误地将下游400错误请求转换为500内部服务器错误，并错误地将PATCH方法转换为PUT，可能泄露内部错误处理行为。

AI Predicted 5.3 Difficulty: Easy EPSS 0.40% · P32

Possible ATT&CK Techniques 1 AI

T1592 · Gather Victim Host Information
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-33192

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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.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 UDM incorrectly returns 500 for empty supi path parameter in PATCH sdm-subscriptions reques
Source: CVE Program / CVE List V5
Vulnerability Description
Free5GC is an open-source Linux Foundation project for 5th generation (5G) mobile core networks. In versions prior to 1.4.2, the UDM incorrectly converts a downstream 400 Bad Request (from UDR) into a 500 Internal Server Error when handling PATCH requests with an empty supi path parameter. Additionally, the UDM incorrectly translates the PATCH method to PUT when forwarding to UDR, indicating a deeper architectural issue. This leaks internal error handling behavior, making it difficult for clients to distinguish between client-side errors and server-side failures. The issue has been patched in version 1.4.2.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
通过错误消息导致的信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
free5GC 安全漏洞
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 1.4.2之前版本存在安全漏洞，该漏洞源于UDM在处理具有空supi路径参数的PATCH请求时，错误地将下游400错误请求转换为500内部服务器错误，并错误地将PATCH方法转换为PUT，可能泄露内部错误处理行为。
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

Vendor Product Affected Versions CPE Subscribe
free5gc free5gc < 1.4.2 -

II. Public POCs for CVE-2026-33192

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-33192

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-33192 (1)

Vendor Advisories for CVE-2026-33192 (1)

Other References for CVE-2026-33192 (1)

Same Patch Batch · free5gc · 2026-03-20 · 7 CVEs total

CVE-2026-32937 free5GC CHF has Out-of-Bounds Slice Access that Leads to DoS
CVE-2026-33062 free5GC NRF Discovery EncodeGroupId Function Panics on Malformed group-id-list Parameter
CVE-2026-33063 free5GC AUSF UE Authentication Panic on Nil SuciSupiMap Interface Conversion
CVE-2026-33064 free5GC UDM DataChangeNotification Procedure Panic Due to Nil Pointer Dereference
CVE-2026-33065 free5GC UDM incorrectly returns 500 for empty supi path parameter in DELETE sdm-subscripti
CVE-2026-33191 free5GC UDM vulnerable to null byte injection in URL path parameters causing 500 Internal

IV. Related Vulnerabilities

Same product: free5gc
Same vendor: free5gc
Same weakness: CWE-209

V. Comments for CVE-2026-33192

No comments yet

Leave a comment