CVE-2026-25791
Reported by github_m · Published February 9, 2026
github.com/bishopfox/sliver is fixed in 1.6.12 (Go Modules)
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.
Fixed versions
Upgrade to a fixed version or later. Language registries are listed first, then Linux distributions, then vendor products.
| Package | Ecosystem | Fixed in |
|---|---|---|
| github.com/bishopfox/sliver | Go Modules | 1.6.12 |
| sliver | bishopfox | 1.7.0 |
Risk scores
Affected products
| Vendor | Product | Versions |
|---|---|---|
| BishopFox | sliver | < 1.7.0 |
| github.com | bishopfox/sliver | 0 |
| BishopFox | sliver | 0 |
Timeline
- Feb 6, 2026 CVE Published
- Feb 9, 2026 PoC Published (2 in total, the first dated here)
- Feb 10, 2026 EPSS Score (30 in total, the first dated here)
- Feb 10, 2026 CVE Updated
- Feb 12, 2026 Security Advisory
- Mar 22, 2026 Coalition ESS Score (2 in total, the first dated here)
Query this with the API
The same record, from the CLI:
vulnetix vdb vuln CVE-2026-25791
vulnetix vdb fixes CVE-2026-25791Or with curl, using the org id and key from your account page:
curl -s -H "Authorization: ApiKey ${VULNETIX_ORG_ID}:${VULNETIX_API_KEY}" \
"https://api.vdb.vulnetix.com/v2/vuln/CVE-2026-25791/fixes/registry"The Community plan is free and allows 50 queries a day. Get a free API key · API quickstart
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
- https://nvd.nist.gov/vuln/detail/CVE-2026-25791 advisory
- https://github.com/advisories/GHSA-wxrw-gvg8-fqjp advisory
- https://github.com/BishopFox/sliver/commit/2b65089b27c553e79e69f1067cad1339e4f3d937 patch
- https://github.com/BishopFox/sliver url