CVE-2026-78156

Open5GS S6a Authentication-Information-Request hss-s6a-path.c hss_ogs_diam_s6a_air_cb heap-based overflow

HIGH
7.4
CVSS Score
Published: August 23, 2026 at 11:45 PM UTC
Updated: October 14, 2026 at 01:10 PM UTC
1 product affected across 1 vendorOpen5GS

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Severity
HIGH7.4
Exploit prediction
EPSS 0.6%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

All versions2.8.0

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (7)

VDB EntryTechnical Description
Source: cverecord
https://vuldb.com/vuln/394539
SignaturePermissions Required
Source: cverecord
https://vuldb.com/vuln/394539/cti
Third Party Advisory
Source: cverecord
https://vuldb.com/cve/CVE-2026-78156
Third Party Advisory
Source: cverecord
https://vuldb.com/submit/882951
Issue Tracking
Source: cverecord
https://github.com/open5gs/open5gs/issues/4661
Product
Source: cverecord
https://github.com/open5gs/open5gs/

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.4HIGHVulDB
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-122CWE-119

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