VDB
CISA-2026-25791
CISA-2026-25791
PUBLISHED
CVSS 7.5 HIGH
Reported by GitHub_M · Published February 9, 2026
Sliver is a command and control framework that uses a custom Wireguard netstack. Prior to 1.7.0, the DNS C2 listener accepts unauthenticated TOTP bootstrap messages and allocates server-side DNS sessions without validating OTP values, even when EnforceOTP is enabled. Because sessions are stored without a cleanup/expiry path in this flow, an unauthenticated remote actor can repeatedly create sessions and drive memory exhaustion. This vulnerability is fixed in 1.7.0.
Risk Scores
CVSS 3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| BishopFox | sliver | < 1.7.0 |
| BishopFox | sliver | < 1.7.0, * |
Timeline
- Feb 9, 2026 CVE Published
- Feb 10, 2026 CVE Updated
References
- https://github.com/BishopFox/sliver/security/advisories/GHSA-wxrw-gvg8-fqjp x_refsource_CONFIRM
- https://github.com/BishopFox/sliver/releases/tag/v1.7.0 x_refsource_MISC