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CVE-2026-78156

7.4 · HIGH

A security vulnerability has been detected in Open5GS 2.8.0.

Published Aug 24, 2026CWE-119EPSS 0.56%

Overview

CVE-2026-78156 is a high-severity vulnerability. It was published on August 24, 2026 and has a CVSS 3.1 base score of 7.4 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.4, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

A security vulnerability has been detected in Open5GS 2.8.0. Affected by this issue is the function hss_ogs_diam_s6a_air_cb of the file src/hss/hss-s6a-path.c of the component S6a Authentication-Information-Request Handler. Such manipulation of the argument Visited-PLMN-Id leads to heap-based buffer overflow. The attack may be performed from remote. The name of the patch is a9c82ee0b590d76a581b0580cb46b598984e2392. A patch should be applied to remediate this issue.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/open5gs/open5gs/GitHubgithub.com/open5gs/open5gs/commit/a9c82ee0b590d76a581b0580cb46b598984e2392GitHubgithub.com/open5gs/open5gs/issues/4661Refvuldb.com/cve/CVE-2026-78156Refvuldb.com/submit/882951Refvuldb.com/vuln/394539Refvuldb.com/vuln/394539/cti

How CyberStrike helps

Frequently asked questions

What is CVE-2026-78156?

CVE-2026-78156 is a high-severity vulnerability. It was published on August 24, 2026 and has a CVSS 3.1 base score of 7.4 (HIGH).

How severe is CVE-2026-78156?

This vulnerability has a CVSS 3.1 base score of 7.4, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-78156?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-78156?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-78156 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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