Inadequate access control vulnerability in Fullstep
Priority MEDIUM 43CWE-306Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-306.
Summary
Inadequate access control in the registration process in Fullstep V5, which could allow unauthenticated users to obtain a valid JWT token with which to interact with authenticated API resources. Successful exploitation of this vulnerability could allow an unauthenticated attacker to compromise the confidentiality of the affected resource, provided they have a valid token with which to interact with the API.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0027 19th percentileScored 2026-11-07
Fix Fixed Fullstep (Fullstep): 5.30.07
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- 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
Remediation
- Fix · CNA Fullstep (Fullstep) Fixed in 5.30.07
Timeline
- 2026-10-02 Threatist record created from CVE-2026-5749
- 2026-10-03 Alias added: GHSA-c4hv-pjjq-493x
References
More Fullstep vulnerabilities
- TI-2026-05041 Insecure direct object reference (IDOR) vulnerability in Fullstep CVSS 4.0HIGH 7.6
Sources
- CVE-2026-5749 · CVE Program
- CVE-2026-5749 · NVD
- FIRST EPSS
- GHSA-c4hv-pjjq-493x · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences