{"answers":{"affected":"3 open source packages ship an affected version, including github.com/bishopfox/sliver. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-25791 in the wild and no public exploit code.","fix":"Upgrade github.com/bishopfox/sliver to 1.6.12 or later.","what":"CVE-2026-25791 is a high-severity denial of service vulnerability in BishopFox sliver, published on 9 Feb 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-25791 and fix it if it is affected.\n\nWhat it is: CVE-2026-25791 is a high-severity denial of service vulnerability in BishopFox sliver, published on 9 Feb 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-25791 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- github.com/bishopfox/sliver (Go): affected all versions; no fix listed\n- github.com/bishopfox/sliver (Go): affected all versions; fixed in 1.6.12\n- github.com/bishopfox/sliver (Go): affected all versions; fixed in 1.6.12\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-25791/ (Markdown: https://insights.sbomify.com/CVE-2026-25791/index.md)","id":"CVE-2026-25791","markdown":"https://insights.sbomify.com/CVE-2026-25791/index.md","name":"CVE-2026-25791","record":{"aliases":["GHSA-wxrw-gvg8-fqjp","GO-2026-4466"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"C2 framework","requires_auth":"none","summary":"Unauthenticated attackers can flood Sliver C2 server with DNS sessions, causing memory exhaustion and denial of service.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"sliver","vendor":"bishopfox"}],"cvss":{"score":7.5,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-400","name":"Uncontrolled Resource Consumption"},{"id":"CWE-306","name":"Missing Authentication for Critical Functionality"}],"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.","ecosystems":["Go"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Sliver has a DNS C2 OTP Bypass Allows Unauthenticated Session Flooding and Denial of Service","id":"CVE-2026-25791","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":3,"n_references":2,"next":{"headline":"Greenshot Vulnerable to OS Command Injection via ExternalCommand Plugin","id":"CVE-2026-25792"},"packages":[{"ecosystem":"Go","fixed":[],"introduced":["0"],"last_affected":[],"package":"github.com/bishopfox/sliver","purl":"pkg:golang/github.com/bishopfox/sliver","source":"GO-2026-4466"},{"ecosystem":"Go","fixed":["1.6.12"],"introduced":["0"],"last_affected":[],"package":"github.com/bishopfox/sliver","purl":null,"source":"GHSA-wxrw-gvg8-fqjp"},{"ecosystem":"Go","fixed":["1.6.12"],"introduced":["0"],"last_affected":[],"package":"github.com/bishopfox/sliver","purl":"pkg:golang/github.com/bishopfox/sliver","source":"GHSA-wxrw-gvg8-fqjp"}],"prev":{"headline":"Wazuh has Stack-Based Buffer Overflow in Security Configuration Assessment JSON Parser","id":"CVE-2026-25790"},"products":["sliver"],"published":"2026-02-09","related":[{"cvss_score":8.1,"headline":"Silver vulnerable to MitM attack against implants due to a cryptography vulnerability","id":"CVE-2023-34758","kev_date_added":null,"published":"2023-08-28"},{"cvss_score":6.9,"headline":"Server-Side Request Forgery (SSRF) in sliver teamserver","id":"CVE-2025-27090","kev_date_added":null,"published":"2025-02-19"},{"cvss_score":6.5,"headline":"Website Path Traversal / Arbitrary File Read (Authenticated) in Sliver","id":"CVE-2026-25760","kev_date_added":null,"published":"2026-02-06"},{"cvss_score":5.9,"headline":"Sliver One-Click Remote Access: Insecure CORS \u0026 Unauthenticated MCP Interface","id":"CVE-2026-34227","kev_date_added":null,"published":"2026-03-31"},{"cvss_score":5.7,"headline":"Sliver Vulnerable to Authenticated OOM via Memory Exhaustion in mTLS/WireGuard Transports","id":"CVE-2026-32941","kev_date_added":null,"published":"2026-03-20"},{"cvss_score":2.1,"headline":"Sliver: Authenticated Nil-Pointer Dereference in Handlers","id":"CVE-2026-29781","kev_date_added":null,"published":"2026-03-07"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CC BY 4.0","name":"Go Vulnerability Database","prefix":"GO"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-02-10","vendors":["BishopFox"]},"summary":"Unauthenticated attackers can flood Sliver C2 server with DNS sessions, causing memory exhaustion and denial of service.","url":"https://insights.sbomify.com/CVE-2026-25791/"}