{"answers":{"affected":"3 open source packages ship an affected version, including github.com/bishopfox/sliver. It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-29781 exists.","fix":"No fix published yet.","what":"CVE-2026-29781 is a low-severity vulnerability in BishopFox sliver, published on 7 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-29781 and fix it if it is affected.\n\nWhat it is: CVE-2026-29781 is a low-severity vulnerability in BishopFox sliver, published on 7 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-29781 exists.\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 up to 1.7.3; no fix listed\n- github.com/bishopfox/sliver (Go): affected all versions up to 1.7.3; no fix listed\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-2026-29781/ (Markdown: https://insights.sbomify.com/CVE-2026-29781/index.md)","id":"CVE-2026-29781","markdown":"https://insights.sbomify.com/CVE-2026-29781/index.md","name":"CVE-2026-29781","record":{"aliases":["GHSA-hx52-cv84-jr5v","GO-2026-4609"],"analysis":{"component_type":"server_software","fix_type":"no_fix_stated","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"C2 framework","requires_auth":"low_privilege","summary":"An authenticated attacker can crash the Sliver C2 server by sending malformed messages, causing a global denial of service for all active sessions.","user_interaction":"not_required","vuln_class":"null_dereference"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"sliver","vendor":"bishopfox"}],"cvss":{"score":2.1,"severity":"low","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P","version":"4.0"},"cwes":[{"id":"CWE-476","name":"NULL Pointer Dereference"}],"description":"Sliver is a command and control framework that uses a custom Wireguard netstack. In versions from 1.7.3 and prior, a vulnerability exists in the Sliver C2 server's Protobuf unmarshalling logic due to a systemic lack of nil-pointer validation. By extracting valid implant credentials and omitting nested fields in a signed message, an authenticated actor can trigger an unhandled runtime panic. Because the mTLS, WireGuard, and DNS transport layers lack the panic recovery middleware present in the HTTP transport, this results in a global process termination. While requiring post-authentication access (a captured implant), this flaw effectively acts as an infrastructure \"kill-switch,\" instantly severing all active sessions across the entire fleet and requiring a manual server restart to restore operations. At time of publication, there are no publicly available patches.","ecosystems":["Go"],"exploits":{"exploitdb":0,"first_seen":"2026-02-28","github_poc":1,"max_poc_stars":4,"metasploit":0,"nuclei":0,"refs":[{"date":"2026-02-28T00:20:22Z","kind":"github_poc","ref":"https://github.com/skoveit/CVE-2026-29781","stars":4,"title":"CVE-2026-29781 PoC - uno reverse"}],"tier":"weaponised"},"has_fix":true,"headline":"Sliver: Authenticated Nil-Pointer Dereference in Handlers","id":"CVE-2026-29781","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":null,"products":[],"type":"null_dereference","year":"2026"},"n_packages":3,"n_references":1,"next":{"headline":"OpenSTAManager: Remote Code Execution via Insecure Deserialization in OAuth2","id":"CVE-2026-29782"},"packages":[{"ecosystem":"Go","fixed":[],"introduced":["0"],"last_affected":[],"package":"github.com/bishopfox/sliver","purl":"pkg:golang/github.com/bishopfox/sliver","source":"GO-2026-4609"},{"ecosystem":"Go","fixed":[],"introduced":["0"],"last_affected":["1.7.3"],"package":"github.com/bishopfox/sliver","purl":null,"source":"GHSA-hx52-cv84-jr5v"},{"ecosystem":"Go","fixed":[],"introduced":["0"],"last_affected":["1.7.3"],"package":"github.com/bishopfox/sliver","purl":"pkg:golang/github.com/bishopfox/sliver","source":"GHSA-hx52-cv84-jr5v"}],"prev":{"headline":"eml_parser: Path Traversal in Official Example Script Leading to Arbitrary File Write","id":"CVE-2026-29780"},"products":["sliver"],"published":"2026-03-07","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":7.5,"headline":"Sliver has a DNS C2 OTP Bypass Allows Unauthenticated Session Flooding and Denial of Service","id":"CVE-2026-25791","kev_date_added":null,"published":"2026-02-09"},{"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"}],"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)"},{"class":"open","licence":"CC0","name":"PoC-in-GitHub"}],"ssvc":{"automatable":"no","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-03-09","vendors":["BishopFox"]},"summary":"An authenticated attacker can crash the Sliver C2 server by sending malformed messages, causing a global denial of service for all active sessions.","url":"https://insights.sbomify.com/CVE-2026-29781/"}