{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-56766 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-56766 is a high-severity memory corruption vulnerability in vanhauser-thc thc-hydra, published on 25 Jun 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-56766 and fix it if it is affected.\n\nWhat it is: CVE-2026-56766 is a high-severity memory corruption vulnerability in vanhauser-thc thc-hydra, published on 25 Jun 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2026-56766 in the wild and no public exploit code.\n\nAffected product: vanhauser-thc thc-hydra. No package-level version data is available, so check the vendor advisory linked from the reference page.\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-2026-56766/ (Markdown: https://insights.sbomify.com/CVE-2026-56766/index.md)","id":"CVE-2026-56766","markdown":"https://insights.sbomify.com/CVE-2026-56766/index.md","name":"CVE-2026-56766","record":{"aliases":["GHSA-3r6x-6cp5-6575","UBUNTU-CVE-2026-56766","openSUSE-SU-2026:11131-1"],"analysis":{"component_type":"developer_tool","fix_type":"patch","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"Network authentication tool","requires_auth":"none","summary":"A malicious server can trigger a stack buffer overflow in Hydra's NTLM handler, potentially allowing remote code execution on the client system.","user_interaction":"required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[],"cvss":{"score":8.6,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-121","name":"Stack-based Buffer Overflow"}],"description":"Hydra through 9.7, fixed in commit 9cc84c2, contains a stack buffer overflow in NTLM authentication across SMTP, POP3, IMAP, NNTP, HTTP, HTTP-Proxy, and HTTP-Proxy-Urlenum modules when processing malicious NTLM Type-2 challenges. A malicious server can send a crafted NTLM Type-2 challenge with an excessively long domain string, causing base64-encoded response data to overflow a 500-byte stack buffer by 18 to 330 bytes, enabling remote code execution on systems without stack protection.","ecosystems":["openSUSE:Tumbleweed"],"exploits":{"exploitdb":1,"first_seen":"2026-07-07","github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[{"date":"2026-07-07","kind":"exploitdb","ref":"52622","stars":null,"title":"Hydra - Stack Buffer Overflow"}],"tier":"poc_unverified"},"has_fix":true,"headline":"Hydra - Stack Buffer Overflow in NTLM Authentication Handler","id":"CVE-2026-56766","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"memory_corruption","year":"2026"},"n_packages":1,"n_references":2,"next":{"headline":"Maxun \u003c 0.0.42 - Cross-Tenant IDOR in Storage and Webhook API Handlers","id":"CVE-2026-56767"},"packages":[{"ecosystem":"openSUSE:Tumbleweed","fixed":["9.7+git20.gbccaea1-1.1"],"introduced":["0"],"last_affected":[],"package":"hydra","purl":"pkg:rpm/opensuse/hydra\u0026distro=openSUSE%20Tumbleweed","source":"openSUSE-SU-2026:11131-1"}],"prev":{"headline":"Vikunja: Unauthenticated Instance-Wide Data Breach via Link Share Hash Disclosure Chained with Cross-Project Attachment IDOR","id":"CVE-2026-56765"},"products":["thc-hydra"],"published":"2026-06-25","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"SUSE","prefix":"openSUSE"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"},{"class":"attribution","licence":"GPL-2.0-or-later","name":"Exploit-DB"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-07-14","vendors":["vanhauser-thc"]},"summary":"A malicious server can trigger a stack buffer overflow in Hydra's NTLM handler, potentially allowing remote code execution on the client system.","url":"https://insights.sbomify.com/CVE-2026-56766/"}