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.
https://vuldb.com/vuln/394539/cti
https://vuldb.com/submit/882951
https://vuldb.com/cve/CVE-2026-78156
https://github.com/open5gs/open5gs/issues/4661
https://github.com/open5gs/open5gs/commit/a9c82ee0b590d76a581b0580cb46b598984e2392
Published: 2026-08-24
Updated: 2026-08-24
Base Score: 6.5
Vector: CVSS2#AV:N/AC:L/Au:S/C:P/I:P/A:P
Severity: Medium
Base Score: 7.4
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L
Severity: High
Base Score: 5.3
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L
Severity: Medium
EPSS: 0.00333