{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-4648 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-4648 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-4648 is a medium-severity vulnerability in CasfID Servicios Tecnológicos NFC Wristbands, published on 28 Jul 2026. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-4648 and fix it if it is affected.\n\nWhat it is: CVE-2026-4648 is a medium-severity vulnerability in CasfID Servicios Tecnológicos NFC Wristbands, published on 28 Jul 2026. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-4648 in the wild and no public exploit code.\n\nAffected product: CasfID Servicios Tecnológicos NFC Wristbands. 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-2026-4648/ (Markdown: https://insights.sbomify.com/CVE-2026-4648/index.md)","id":"CVE-2026-4648","markdown":"https://insights.sbomify.com/CVE-2026-4648/index.md","name":"CVE-2026-4648","record":{"aliases":["GHSA-4x9m-p82w-8mmp"],"analysis":{"component_type":"iot_embedded","fix_type":"no_fix_stated","impacts":["data_read","account_takeover"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"NFC payment wristband","requires_auth":"none","summary":"Weak MIFARE Classic encryption allows attackers to clone NFC wristbands, steal balances, and impersonate users in cashless payment systems.","user_interaction":"not_required","vuln_class":"weak_cryptography"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"INCIBE","cpe":[],"cvss":{"score":6.8,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-326","name":"Inadequate Encryption Strength"}],"description":"Use of an insecure cryptographic algorithm in the cashless payment system using NFC wristbands from CasfID Servicios Tecnológicos S.L.U. (version used at Resurrection Fest 2025), which employs cards based on MIFARE Classic technology (FM11RF08S). The cryptographic weakness of the authentication algorithm allows an attacker to retrieve access keys using techniques known as Backdoored Nested Attack, read the wristband’s entire contents, and clone its credentials onto a compatible rewritable card. Exploitation of this vulnerability could enable the impersonation of other attendees, the fraudulent use of the balance associated with their wristbands, and financial losses for both the affected users and the event organizers.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":null,"headline":"Insufficient Encryption Level in CasfID Servicios Tecnológicos NFC Wristbands","id":"CVE-2026-4648","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"weak_cryptography","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"Auth bypass in Apache Artemis allows reading all internal messages","id":"CVE-2026-4649"},"packages":[],"prev":{"headline":"Binutils: out-of-bounds read in xcoff relocation processing in gnu binutils bfd library","id":"CVE-2026-4647"},"products":["NFC Wristbands"],"published":"2026-07-28","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":"no","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-07-28","vendors":["CasfID Servicios Tecnológicos"]},"summary":"Weak MIFARE Classic encryption allows attackers to clone NFC wristbands, steal balances, and impersonate users in cashless payment systems.","url":"https://insights.sbomify.com/CVE-2026-4648/"}