CVE-2025-55904

Severity: medium (CVSS 4.0 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2025-09-17 · updated 2026-06-17
Weakness: CWE-476

Description

Open5GS v2.7.5, prior to commit 67ba7f92bbd7a378954895d96d9d7b05d5b64615, is vulnerable to a NULL pointer dereference when a multipart/related HTTP POST request with an empty HTTP body is sent to the SBI of either AMF, AUSF, BSF, NRF, NSSF, PCF, SMF, UDM, or UDR, resulting in a denial of service. This occurs in the parse_multipart function in lib/sbi/message.c.

Affected products

Open5GS: before 2.7.6 — fixed in 2.7.6

How to fix

Upgrade to a fixed version: Open5GS 2.7.6. Check the vendor advisory for mitigations.

References

https://github.com/open5gs/open5gs/commit/67ba7f92bbd7a378954895d96d9d7b05d5b64615
https://github.com/open5gs/open5gs/issues/3942
https://github.com/tsiamoulis/vuln-research/tree/main/CVE-2025-55904

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