CTEK Chargeportal Insufficient Session Expiration
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- Low · Low · Low
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-613.
Summary
The WebSocket backend uses charging station identifiers to uniquely associate sessions but allows multiple endpoints to connect using the same session identifier. This implementation results in predictable session identifiers and enables session hijacking or shadowing, where the most recent connection displaces the legitimate charging station and receives backend commands intended for that station. This vulnerability may allow unauthorized users to authenticate as other users or enable a malicious actor to cause a denial-of-service condition by overwhelming the backend with valid session requests.
Why it matters now
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
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-27649
- 2026-10-03 Alias added: GHSA-h5wq-j227-wjwh
References
More CTEK Charge Portal vulnerabilities
- TI-2026-20348 CTEK Chargeportal Missing Authentication for Critical Function CVSS 4.0CRITICAL 9.3
- TI-2026-24455 CTEK Chargeportal Improper Restriction of Excessive Authentication Attempts CVSS 4.0HIGH 8.7
Sources
- CVE-2026-27649 · CVE Program
- CVE-2026-27649 · NVD
- FIRST EPSS
- GHSA-h5wq-j227-wjwh · 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