CVE-2026-25791

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Source
https://cve.org/CVERecord?id=CVE-2026-25791
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-25791.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-25791
Aliases
Downstream
Related
Published
2026-02-09T20:34:31.144Z
Modified
2026-03-04T22:28:56.448763Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
Sliver has a DNS C2 OTP Bypass Allows Unauthenticated Session Flooding and Denial of Service
Details

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.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-306",
        "CWE-400"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/25xxx/CVE-2026-25791.json"
}
References

Affected packages

Git / github.com/bishopfox/sliver

Affected ranges

Type
GIT
Repo
https://github.com/bishopfox/sliver
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
0bef5491dcca31485962e49cbf15cdda8c37a3f7

Affected versions

Other
git-7d47fe39
v0.*
v0.0.1-alpha
v0.0.2-alpha
v0.0.3-alpha
v0.0.5-alpha
v0.0.6-alpha
v1.*
v1.0.0-beta
v1.0.2-beta
v1.0.3-beta
v1.0.6-beta
v1.0.7-beta
v1.0.8-beta
v1.1.0
v1.1.1
v1.2.0
v1.2.1
v1.3.0
v1.3.1
v1.4.0
v1.4.1
v1.4.10
v1.4.11
v1.4.12
v1.4.13
v1.4.14
v1.4.15
v1.4.16
v1.4.17
v1.4.18
v1.4.19
v1.4.2
v1.4.20
v1.4.21
v1.4.22
v1.4.3
v1.4.4
v1.4.5
v1.4.6
v1.4.7
v1.4.8
v1.4.9
v1.5.0
v1.5.1
v1.5.10
v1.5.11
v1.5.12
v1.5.13
v1.5.14
v1.5.15
v1.5.16
v1.5.17
v1.5.18
v1.5.19
v1.5.2
v1.5.20
v1.5.21
v1.5.22
v1.5.23
v1.5.24
v1.5.25
v1.5.26
v1.5.27
v1.5.28
v1.5.29
v1.5.3
v1.5.30
v1.5.31
v1.5.32
v1.5.33
v1.5.34
v1.5.35
v1.5.36
v1.5.37
v1.5.38
v1.5.39
v1.5.4
v1.5.5
v1.5.6
v1.5.7
v1.5.8
v1.5.9
v1.6.0
v1.6.1
v1.6.10
v1.6.11
v1.6.2
v1.6.3
v1.6.4
v1.6.5
v1.6.6
v1.6.7
v1.6.8
v1.6.9
v1.7.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-25791.json"