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CVE-2026-1738— Open5GS SGWC context.c sgwc_tunnel_add assertion

Quick assessment

Affected
n/a Open5GS
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.

Open5GS是Open5GS开源的一个 5G Core 和 Epc 的 C 语言开源实现，即 Lte/Nr 网络的核心网络。 Open5GS 2.7.6及之前版本存在安全漏洞，该漏洞源于对文件/src/sgwc/context.c中函数sgwc_tunnel_add的参数pdr的错误操作，可能导致可达断言。

CVSS 5.3 · Medium EPSS 0.74% · P54

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-1738

Vulnerability Information
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Vulnerability Title
Open5GS SGWC context.c sgwc_tunnel_add assertion
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw has been found in Open5GS up to 2.7.6. The impacted element is the function sgwc_tunnel_add of the file /src/sgwc/context.c of the component SGWC. Executing a manipulation of the argument pdr can lead to reachable assertion. The attack can be executed remotely. The exploit has been published and may be used. It is advisable to implement a patch to correct this issue. The issue report is flagged as already-fixed.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
可达断言
Source: CVE Program / CVE List V5
Vulnerability Title
Open5GS 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Open5GS是Open5GS开源的一个 5G Core 和 Epc 的 C 语言开源实现，即 Lte/Nr 网络的核心网络。 Open5GS 2.7.6及之前版本存在安全漏洞，该漏洞源于对文件/src/sgwc/context.c中函数sgwc_tunnel_add的参数pdr的错误操作，可能导致可达断言。
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
- Open5GS 2.7.0 cpe:2.3:a:open5gs:open5gs:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-1738

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-1738

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Vendor Advisories for CVE-2026-1738 (1)

Other References for CVE-2026-1738 (1)

Same Patch Batch · n/a · 2026-02-02 · 7 CVEs total

CVE-2026-1746 6.3 MEDIUM JeecgBoot Online Report API loadDictItemByKeyword sql injection
CVE-2026-1736 5.3 MEDIUM Open5GS SGWC s11-handler.c assertion
CVE-2026-1737 5.3 MEDIUM Open5GS CreateBearerRequest s5c-handler.c sgwc_s5c_handle_create_bearer_request assertion
CVE-2025-70959 Tendenci 安全漏洞
CVE-2025-70960 Tendenci 安全漏洞
CVE-2025-70958 Subrion CMS 安全漏洞

IV. Related Vulnerabilities

Same product: Open5GS
Same vendor: n/a
Same weakness: CWE-617

V. Comments for CVE-2026-1738

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