{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-48490 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-48490 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-48490 is a medium-severity memory corruption vulnerability in ArduinoCore-avr, published on 11 Sep 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-2026-48490 and fix it if it is affected.\n\nWhat it is: CVE-2026-48490 is a medium-severity memory corruption vulnerability in ArduinoCore-avr, published on 11 Sep 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-2026-48490 in the wild and no public exploit code.\n\nAffected product: ArduinoCore-avr. 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-2026-48490/ (Markdown: https://insights.sbomify.com/CVE-2026-48490/index.md)","id":"CVE-2026-48490","markdown":"https://insights.sbomify.com/CVE-2026-48490/index.md","name":"CVE-2026-48490","record":{"aliases":["GHSA-fhp2-f8hw-mgpj"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["code_execution","denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Arduino AVR core","requires_auth":"none","summary":"Attacker can trigger stack buffer overflow via large float concatenation, causing DoS or code execution on Arduino AVR boards.","user_interaction":"not_required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":6.9,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-120","name":"Buffer Copy without Checking Size of Input"}],"description":"ArduinoCore-avr contains the source code and configuration files of the Arduino AVR Boards platform. A vulnerability in versions prior to 1.8.8 allows an attacker to trigger a stack-based buffer overflow when concatenating floating-point values of sufficiently large magnitude onto an Arduino String object. By passing values near the extremes of the float or double range to `String::concat(float)`, `String::concat(double)`, `String::operator+=()`, or the `+` operator with a float/double operand, `dtostrf()` writes beyond the fixed-size stack buffer, causing memory corruption and denial of service. Under specific conditions, this could enable arbitrary code execution on AVR-based Arduino boards. The fix is included starting from the `1.8.8 `release.","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":"ArduinoCore-AVR: Stack-Based Buffer Overflow in String float/double concatenation handler","id":"CVE-2026-48490","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"memory_corruption","year":"2026"},"n_packages":0,"n_references":3,"next":{"headline":"Traefik: SNICheck ignores wildcard TLSOptions mappings, allowing domain-fronted mTLS bypass","id":"CVE-2026-48491"},"packages":[],"prev":{"headline":"Symfony: Security Firewall Bypass via failure_forward Subrequest: Unauthenticated Access to access_control-Protected GET Routes","id":"CVE-2026-48489"},"products":["ArduinoCore-avr"],"published":"2026-09-11","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":"2026-09-14","vendors":["arduino"]},"summary":"Attacker can trigger stack buffer overflow via large float concatenation, causing DoS or code execution on Arduino AVR boards.","url":"https://insights.sbomify.com/CVE-2026-48490/"}