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CVE-2026-4988

A security flaw has been discovered in Open5GS 2.7.6. This issue affects the function smf_gx_cca_cb/smf_gy_cca_cb/smf_s6b of the component CCA Message Handler. The manipulation results in denial of service. The attack may be launched remotely. Attacks of this nature are highly complex. The exploitability is assessed as difficult. The exploit has been released to the public and may be used for attacks.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:c78c11b5238f6cd28fe5954da5bc38159e540f3ea1d18587faa7a802f28d9ef8
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cvss · 4 assertions

{"metric":{"baseScore":2.6,"vectorString":"AV:N/AC:H/Au:N/C:N/I:N/A:P/E:POC/RL:ND/RC:UR","version":"2.0"},"metric_type":"cvssV2_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:738e9a42c2eee29eff2380e0ef36c8b66e041f12bc307de283187cd272513fe3 · sha256:731c8c1c72852269… · /containers/cna/metrics/3/cvssV2_0

{"metric":{"baseScore":3.7,"baseSeverity":"LOW","vectorString":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R","version":"3.0"},"metric_type":"cvssV3_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:738e9a42c2eee29eff2380e0ef36c8b66e041f12bc307de283187cd272513fe3 · sha256:731c8c1c72852269… · /containers/cna/metrics/2/cvssV3_0

{"metric":{"baseScore":6.3,"baseSeverity":"MEDIUM","vectorString":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P","version":"4.0"},"metric_type":"cvssV4_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:738e9a42c2eee29eff2380e0ef36c8b66e041f12bc307de283187cd272513fe3 · sha256:731c8c1c72852269… · /containers/cna/metrics/0/cvssV4_0

{"metric":{"baseScore":3.7,"baseSeverity":"LOW","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:738e9a42c2eee29eff2380e0ef36c8b66e041f12bc307de283187cd272513fe3 · sha256:731c8c1c72852269… · /containers/cna/metrics/1/cvssV3_1

Affected products and versions

1 source assertion
{"cpes":["cpe:2.3:a:open5gs:open5gs:*:*:*:*:*:*:*:*"],"modules":["CCA Message Handler"],"product":"Open5GS","vendor":"n/a","versions":[{"status":"affected","version":"2.7.6"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:738e9a42c2eee29eff2380e0ef36c8b66e041f12bc307de283187cd272513fe3 · sha256:731c8c1c72852269… · /containers/cna/affected/0

Provider-owned CVSS observations

4 source assertions
{"metric":{"baseScore":2.6,"vectorString":"AV:N/AC:H/Au:N/C:N/I:N/A:P/E:POC/RL:ND/RC:UR","version":"2.0"},"metric_type":"cvssV2_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:738e9a42c2eee29eff2380e0ef36c8b66e041f12bc307de283187cd272513fe3 · sha256:731c8c1c72852269… · /containers/cna/metrics/3/cvssV2_0
{"metric":{"baseScore":3.7,"baseSeverity":"LOW","vectorString":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R","version":"3.0"},"metric_type":"cvssV3_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:738e9a42c2eee29eff2380e0ef36c8b66e041f12bc307de283187cd272513fe3 · sha256:731c8c1c72852269… · /containers/cna/metrics/2/cvssV3_0
{"metric":{"baseScore":6.3,"baseSeverity":"MEDIUM","vectorString":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P","version":"4.0"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:738e9a42c2eee29eff2380e0ef36c8b66e041f12bc307de283187cd272513fe3 · sha256:731c8c1c72852269… · /containers/cna/metrics/0/cvssV4_0
{"metric":{"baseScore":3.7,"baseSeverity":"LOW","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:738e9a42c2eee29eff2380e0ef36c8b66e041f12bc307de283187cd272513fe3 · sha256:731c8c1c72852269… · /containers/cna/metrics/1/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-404","description":"Denial of Service","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:738e9a42c2eee29eff2380e0ef36c8b66e041f12bc307de283187cd272513fe3 · sha256:731c8c1c72852269… · /containers/cna/problemTypes/0/descriptions/0

Source references

6 source assertions
{"tags":["product"],"url":"https://github.com/open5gs/open5gs/"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:738e9a42c2eee29eff2380e0ef36c8b66e041f12bc307de283187cd272513fe3 · sha256:731c8c1c72852269… · /containers/cna/references/5
{"tags":["issue-tracking"],"url":"https://github.com/open5gs/open5gs/issues/4342"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:738e9a42c2eee29eff2380e0ef36c8b66e041f12bc307de283187cd272513fe3 · sha256:731c8c1c72852269… · /containers/cna/references/3
{"tags":["exploit","issue-tracking"],"url":"https://github.com/open5gs/open5gs/issues/4342#issue-4021772232"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:738e9a42c2eee29eff2380e0ef36c8b66e041f12bc307de283187cd272513fe3 · sha256:731c8c1c72852269… · /containers/cna/references/4
{"name":"VDB-353875 | CTI Indicators (IOB, IOC, TTP, IOA)","tags":["signature","permissions-required"],"url":"https://vuldb.com/?ctiid.353875"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:738e9a42c2eee29eff2380e0ef36c8b66e041f12bc307de283187cd272513fe3 · sha256:731c8c1c72852269… · /containers/cna/references/1
{"name":"VDB-353875 | Open5GS CCA Message smf_s6b denial of service","tags":["vdb-entry","technical-description"],"url":"https://vuldb.com/?id.353875"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:738e9a42c2eee29eff2380e0ef36c8b66e041f12bc307de283187cd272513fe3 · sha256:731c8c1c72852269… · /containers/cna/references/0
{"name":"Submit #771349 | Open5GS SMF v2.7.6 Denial of Service","tags":["third-party-advisory"],"url":"https://vuldb.com/?submit.771349"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:738e9a42c2eee29eff2380e0ef36c8b66e041f12bc307de283187cd272513fe3 · sha256:731c8c1c72852269… · /containers/cna/references/2

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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