Vulnerability Details CVE-2026-4240
A vulnerability was determined in Open5GS up to 2.7.6. The affected element is the function smf_gx_cca_cb/smf_gy_cca_cb/smf_s6b_aaa_cb/smf_s6b_sta_cb of the component CCA Handler. This manipulation causes denial of service. The attack can be initiated remotely. The exploit has been publicly disclosed and may be utilized. Upgrading to version 2.7.7 is sufficient to fix this issue. Patch name: 80eb484a6ab32968e755e628b70d1a9c64f012ec. Upgrading the affected component is recommended.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 17.4%
CVSS Severity
CVSS v3 Score 5.3
CVSS v2 Score 5.0
References
- https://github.com/open5gs/open5gs/
- https://github.com/open5gs/open5gs/commit/80eb484a6ab32968e755e628b70d1a9c64f012ec
- https://github.com/open5gs/open5gs/issues/4343
- https://github.com/open5gs/open5gs/issues/4343#issue-4021871895
- https://github.com/open5gs/open5gs/releases/tag/v2.7.7
- https://vuldb.com/?ctiid.351182
- https://vuldb.com/?id.351182
- https://vuldb.com/?submit.771361
Products affected by CVE-2026-4240
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cpe:2.3:a:open5gs:open5gs:-
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cpe:2.3:a:open5gs:open5gs:0.1.0
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cpe:2.3:a:open5gs:open5gs:0.1.1
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cpe:2.3:a:open5gs:open5gs:0.2.0
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cpe:2.3:a:open5gs:open5gs:0.3.0
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cpe:2.3:a:open5gs:open5gs:0.3.1
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cpe:2.3:a:open5gs:open5gs:0.3.10
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cpe:2.3:a:open5gs:open5gs:0.3.11
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cpe:2.3:a:open5gs:open5gs:0.3.2
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cpe:2.3:a:open5gs:open5gs:0.3.3
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cpe:2.3:a:open5gs:open5gs:0.3.4
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cpe:2.3:a:open5gs:open5gs:0.3.5
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cpe:2.3:a:open5gs:open5gs:0.3.6
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cpe:2.3:a:open5gs:open5gs:0.3.7
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cpe:2.3:a:open5gs:open5gs:0.3.8
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cpe:2.3:a:open5gs:open5gs:0.3.9
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cpe:2.3:a:open5gs:open5gs:0.4.0
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cpe:2.3:a:open5gs:open5gs:0.4.1
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cpe:2.3:a:open5gs:open5gs:0.4.2
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cpe:2.3:a:open5gs:open5gs:0.4.3
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cpe:2.3:a:open5gs:open5gs:0.4.4
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cpe:2.3:a:open5gs:open5gs:0.5.0
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cpe:2.3:a:open5gs:open5gs:0.5.1
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cpe:2.3:a:open5gs:open5gs:0.5.2
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cpe:2.3:a:open5gs:open5gs:1.0.0
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cpe:2.3:a:open5gs:open5gs:1.1.0
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cpe:2.3:a:open5gs:open5gs:1.2.0
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cpe:2.3:a:open5gs:open5gs:1.2.1
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cpe:2.3:a:open5gs:open5gs:1.2.2
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cpe:2.3:a:open5gs:open5gs:1.2.3
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cpe:2.3:a:open5gs:open5gs:1.2.4
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cpe:2.3:a:open5gs:open5gs:1.3.0
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cpe:2.3:a:open5gs:open5gs:2.0.0
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cpe:2.3:a:open5gs:open5gs:2.0.18
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cpe:2.3:a:open5gs:open5gs:2.0.20
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cpe:2.3:a:open5gs:open5gs:2.0.21
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cpe:2.3:a:open5gs:open5gs:2.0.22
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cpe:2.3:a:open5gs:open5gs:2.1.0
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cpe:2.3:a:open5gs:open5gs:2.1.1
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cpe:2.3:a:open5gs:open5gs:2.1.3
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cpe:2.3:a:open5gs:open5gs:2.1.4
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cpe:2.3:a:open5gs:open5gs:2.1.5
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cpe:2.3:a:open5gs:open5gs:2.1.7
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cpe:2.3:a:open5gs:open5gs:2.2.0
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cpe:2.3:a:open5gs:open5gs:2.2.1
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cpe:2.3:a:open5gs:open5gs:2.2.2
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cpe:2.3:a:open5gs:open5gs:2.2.3
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cpe:2.3:a:open5gs:open5gs:2.2.4
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cpe:2.3:a:open5gs:open5gs:2.2.5
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cpe:2.3:a:open5gs:open5gs:2.2.6
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cpe:2.3:a:open5gs:open5gs:2.2.7
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cpe:2.3:a:open5gs:open5gs:2.2.8
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cpe:2.3:a:open5gs:open5gs:2.2.9
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cpe:2.3:a:open5gs:open5gs:2.3.0
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cpe:2.3:a:open5gs:open5gs:2.3.1
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cpe:2.3:a:open5gs:open5gs:2.3.2
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cpe:2.3:a:open5gs:open5gs:2.3.3
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cpe:2.3:a:open5gs:open5gs:2.3.4
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cpe:2.3:a:open5gs:open5gs:2.3.6
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cpe:2.3:a:open5gs:open5gs:2.4.0
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cpe:2.3:a:open5gs:open5gs:2.4.1
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cpe:2.3:a:open5gs:open5gs:2.4.10
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cpe:2.3:a:open5gs:open5gs:2.4.11
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cpe:2.3:a:open5gs:open5gs:2.4.12
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cpe:2.3:a:open5gs:open5gs:2.4.13
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cpe:2.3:a:open5gs:open5gs:2.4.2
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cpe:2.3:a:open5gs:open5gs:2.4.3
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cpe:2.3:a:open5gs:open5gs:2.4.4
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cpe:2.3:a:open5gs:open5gs:2.4.5
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cpe:2.3:a:open5gs:open5gs:2.4.6
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cpe:2.3:a:open5gs:open5gs:2.4.7
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cpe:2.3:a:open5gs:open5gs:2.4.8
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cpe:2.3:a:open5gs:open5gs:2.4.9
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cpe:2.3:a:open5gs:open5gs:2.5.6
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cpe:2.3:a:open5gs:open5gs:2.5.7
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cpe:2.3:a:open5gs:open5gs:2.6.4
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cpe:2.3:a:open5gs:open5gs:2.6.6
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cpe:2.3:a:open5gs:open5gs:2.7.0
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cpe:2.3:a:open5gs:open5gs:2.7.1
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cpe:2.3:a:open5gs:open5gs:2.7.2
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cpe:2.3:a:open5gs:open5gs:2.7.3
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cpe:2.3:a:open5gs:open5gs:2.7.5
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cpe:2.3:a:open5gs:open5gs:2.7.6