What is CVE-2026-33191?

CVE-2026-33191 is a high-severity vulnerability in Free5gc, classified under CWE-158. CVSS score: 8.6/10. Published 2026-03-20.

How severe is CVE-2026-33191?

High severity. CVSS v3 base score is 8.6 out of 10.

Vulnerability in Free5gc

CVE-2026-33191

Free5GC is an open-source Linux Foundation project for 5th generation (5G) mobile core networks. Versions prior to 1.4.2 are vulnerable to null byte injection in URL path parameters. A remote attacker can inject null bytes (URL-encoded as…

EPSS: 0.004 (27.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H.

Affected products

Free5gc — versions < 1.4.2
Free5gc Udm

Weakness classification (CWE)

CWE-158
CWE-248

References

security-advisories@github.com (x_refsource_CONFIRM, Patch, Vendor Advisory)
security-advisories@github.com (Patch, x_refsource_MISC)

Frequently asked questions

What is CVE-2026-33191?: CVE-2026-33191 is a high-severity vulnerability in Free5gc, classified under CWE-158. CVSS score: 8.6/10. Published 2026-03-20.
How severe is CVE-2026-33191?: High severity. CVSS v3 base score is 8.6 out of 10.