Open5GS AMF UEContextReleaseRequest Path improper authorization

published 2026-06-26 4mo ago modified 2026-10-14 28d ago also EUVD-2026-64676 , GHSA-mg8r-2cvv-xq9j

Unreviewed: the maintainers' own advisory

Published by the maintainers on their GitHub repository open5gs/open5gs. GitHub has not reviewed it into the GitHub Advisory Database, so the affected packages and versions are the maintainers' word. Read the full advisory on GitHub.

cvss: 6.3; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.4%; EPSS 0.4% chance of exploitation in 30 days, percentile 30%
public exploits: 0; none known

A flaw has been found in Open5GS 2.8.0. This vulnerability affects unknown code of the component AMF UEContextReleaseRequest Path Handler. Executing a manipulation can lead to improper authorization. It is possible to launch the attack remotely.

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CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 2mo ago (2026-08-27)

Exploit prediction

0.37% chance of exploitation in the next 30 days, higher than 30% of all scored CVEs (FIRST EPSS, 2026-11-11).

CVSS scores

assigned by	version	score	vector
CNA	4.0	5.3	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
CNA	3.1	6.3	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
CNA	3.0	6.3	CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
CNA	2.0	6.5	AV:N/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:ND/RC:UR
CNA	4.0	2.1	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CNA	3.1	6.3	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
CNA	2.0	6.5	AV:N/AC:L/Au:S/C:P/I:P/A:P

Affected products

n/a Open5GS

Classification

Weakness

CWE-285 Improper Authorization
CWE-266 Incorrect Privilege Assignment

References

vuldb.com /vuln/394541
vdb-entry
vuldb.com /vuln/394541/cti
signature, permissions-required
vuldb.com /cve/CVE-2026-78158
third-party-advisory
vuldb.com /submit/883023
third-party-advisory
github.com /open5gs/open5gs/security/advisories/GHSA-mg8r-2cvv-xq9j
related, advisory
github.com /open5gs/open5gs/
product

Sources

CVE List CVE-2026-78158
NVD CVE-2026-78158
Maintainer advisory GHSA-mg8r-2cvv-xq9j

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

The maintainers of open5gs/open5gs published their own advisory on GitHub. Reviewed sources take precedence over it.