{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-71255 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-71255 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-71255 is a high-severity memory corruption vulnerability in debevv nanoMODBUS, published on 5 Aug 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-2026-71255 and fix it if it is affected.\n\nWhat it is: CVE-2026-71255 is a high-severity memory corruption vulnerability in debevv nanoMODBUS, published on 5 Aug 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-2026-71255 in the wild and no public exploit code.\n\nAffected product: debevv nanoMODBUS. 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-2026-71255/ (Markdown: https://insights.sbomify.com/CVE-2026-71255/index.md)","id":"CVE-2026-71255","markdown":"https://insights.sbomify.com/CVE-2026-71255/index.md","name":"CVE-2026-71255","record":{"aliases":["GHSA-9rfp-q4v5-653h"],"analysis":{"component_type":"library","fix_type":"patch","impacts":["code_execution","denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Modbus library","requires_auth":"none","summary":"A malicious Modbus server can trigger an out-of-bounds write in nanoMODBUS clients, potentially leading to code execution or crashes.","user_interaction":"not_required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"TuranSec","cpe":[],"cvss":{"score":8.6,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H","version":"3.1"},"cwes":[{"id":"CWE-787","name":"Out-of-bounds Write"}],"description":"nanoMODBUS through v1.23.0 contains an out-of-bounds write in the Modbus client-side recv_read_device_identification_res function (FC 0x2B/MEI 0x0E, Read Device Identification) in nanomodbus.c. The server-supplied object_length field (0-246) is validated only against the remaining PDU size (res_size_left) and is never validated against the caller-supplied buffers_length parameter.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":false,"headline":"nanoMODBUS Client-Side Out-of-Bounds Write via object_length in recv_read_device_identification_res()","id":"CVE-2026-71255","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"memory_corruption","year":"2026"},"n_packages":0,"n_references":2,"next":{"headline":"nanoMODBUS Client-Side Out-of-Bounds Read Leading to Wild-Pointer Write via object_id","id":"CVE-2026-71256"},"packages":[],"prev":{"headline":"nanoMODBUS Server-Side Out-of-Bounds Write in handle_read_file_record()","id":"CVE-2026-71254"},"products":["nanoMODBUS"],"published":"2026-08-05","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"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":"2026-08-10","vendors":["debevv"]},"summary":"A malicious Modbus server can trigger an out-of-bounds write in nanoMODBUS clients, potentially leading to code execution or crashes.","url":"https://insights.sbomify.com/CVE-2026-71255/"}