Vulnerability in Mosaic5g Flexric
CVE-2026-37233
FlexRIC v2.0.0 contains an authorization bypass in the iApp's xApp isolation mechanism. The equality function eq_xapp_ric_gen_id() in src/ric/iApp/xapp_ric_id.c compares m0->xapp_id against itself (m0->xapp_id) instead of the other argument (m1->xapp_id), effectively ignoring the xApp identity dimension. A malicious xApp connected to the iApp (port 36422) can delete any other xApp's subscriptions by sending an E42_RIC_SUBSCRIPTION_DELETE_REQUEST with a matching ric_gen_id. This breaks multi-tenant isolation in any deployment with multiple xApps sharing the same RIC.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.006 (45.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 45th percentile — 45.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.006 · change: +0.001
Affected products
- Mosaic5g Flexric — versions 2.0.0
Weakness classification (CWE)
References
- gitlab.eurecom.fr/mosaic5g/flexric (Product)
- github.com/MinamiKotor1/oran-security-advisories-zhongnan-luo/blob/main/advisor… (Exploit, Third Party Advisory, Mitigation)
Frequently asked questions
- What is CVE-2026-37233?
- CVE-2026-37233 is a high-severity vulnerability in Mosaic5g Flexric, classified under Reachable Assertion. CVSS score: 7.5/10. Published 2026-06-01.
- How severe is CVE-2026-37233?
- High severity. CVSS v3 base score is 7.5 out of 10.