CVE-2026-34762
LowCVSS 2.7Exploitation Probability (EPSS)
Low risk8th percentile - higher than 8% of all known CVEs
Summary
In Ella Core prior to version 1.8.0, the PUT /api/v1/subscriber/{imsi} API does not verify that the IMSI from the URL path matches the IMSI from the JSON request body. An authenticated NetworkManager can modify any subscriber's policy while the audit trail records a fabricated IMSI. This is fixed in version 1.8.0.
Risk Assessment
The risk is unauthorized modification of subscriber policies by an authenticated NetworkManager, potentially leading to data integrity issues and audit trail manipulation.
Recommendation
Immediately update Ella Core to version 1.8.0 or later, which includes a fix that verifies IMSI consistency.
Other vulnerabilities in Ella Core
See all- CVE-2026-44473High
Ella Core, designed for private 5G networks, prior to version 1.10.0, allowed a radio with a valid NG Setup to send forged PDUSessionResourceSetupResponse messages. The system did not verify if the message arrived over the correct NG connection, leading to the creation of a GTP tunnel towards that radio.
- CVE-2026-34761Medium
Ella Core, a 5G core for private networks, prior to version 1.8.0 panics when processing a NGAP handover failure message. An attacker can send such messages via gNodeB, causing service disruption for all connected subscribers.
Original NVD description (English source)
Ella Core is a 5G core designed for private networks. Prior to version 1.8.0, the PUT /api/v1/subscriber/{imsi} API accepts an IMSI identifier from both the URL path and the JSON request body but never verifies they match. This allows an authenticated NetworkManager to modify any subscriber's policy while the audit trail records a fabricated or unrelated subscriber IMSI. This issue has been patched in version 1.8.0.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS