An issue was discovered in Free5gc NRF 1.4.0.
Priority HIGH 78CWE-863Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and GitHub. Impact type from CWE-863.
Summary
An issue was discovered in Free5gc NRF 1.4.0. In the access-token generation logic of free5GC, the AccessTokenScopeCheck() function in file internal/sbi/processor/access_token.go bypasses all scope validation when the attacker uses a crafted targetNF value. This allows attackers to obtain an access token with any arbitrary scope.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00361 30th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed github.com/free5gc/nrf (Go): 1.4.1
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
| — | github.com/free5gc/nrf (Go) | before 1.4.1 | 1.4.1 | Patch available | GHSA-q7c8-gfjh-8v4p |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
- github.com/free5gc/nrf (Go) Vendor— Affected before 1.4.1 Fixed in 1.4.1 Patch available GHSA-q7c8-gfjh-8v4p
Remediation
- Fix · GHSA-q7c8-gfjh-8v4p github.com/free5gc/nrf (Go) Fixed in 1.4.1 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2025-66719
- 2026-10-03 Alias added: GHSA-q7c8-gfjh-8v4p
References
Sources
- CVE-2025-66719 · CVE Program
- CVE-2025-66719 · NVD
- FIRST EPSS
- GHSA-q7c8-gfjh-8v4p · GitHub Advisory Database · CC BY 4.0
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