High severity7.5NVD Advisory· Published Feb 9, 2026· Updated Jun 17, 2026
CVE-2026-25791
CVE-2026-25791
Description
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.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
github.com/bishopfox/sliverGo | < 1.6.12 | 1.6.12 |
Affected products
5- ghsa-coords3 versionspkg:golang/github.com/bishopfox/sliverpkg:rpm/opensuse/govulncheck-vulndb&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/govulncheck-vulndb&distro=openSUSE%20Leap%2016.0
< 1.6.12+ 2 more
- (no CPE)range: < 1.6.12
- (no CPE)range: < 0.0.20260226T182644-150000.1.149.1
- (no CPE)range: < 0.0.20260723T184607-160000.1.1
Patches
Vulnerability mechanics
References
5- github.com/BishopFox/sliver/security/advisories/GHSA-wxrw-gvg8-fqjpnvdExploitVendor AdvisoryWEB
- github.com/advisories/GHSA-wxrw-gvg8-fqjpghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-25791ghsaADVISORY
- github.com/BishopFox/sliver/commit/2b65089b27c553e79e69f1067cad1339e4f3d937ghsaWEB
- github.com/BishopFox/sliver/releases/tag/v1.7.0nvdProductRelease NotesWEB
News mentions
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