{"answers":{"affected":"","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-47971 exists.","fix":"No fix has been published for CVE-2021-47971 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-47971 is a high-severity denial of service vulnerability in my-notes-safe My Notes Safe, published on 16 May 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-2021-47971 and fix it if it is affected.\n\nWhat it is: CVE-2021-47971 is a high-severity denial of service vulnerability in my-notes-safe My Notes Safe, published on 16 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-47971 exists.\n\nAffected product: my-notes-safe My Notes Safe. 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-2021-47971/ (Markdown: https://insights.sbomify.com/CVE-2021-47971/index.md)","id":"CVE-2021-47971","markdown":"https://insights.sbomify.com/CVE-2021-47971/index.md","name":"CVE-2021-47971","record":{"aliases":["GHSA-w4w9-25xj-f9j4"],"analysis":{"component_type":"desktop_application","fix_type":"no_fix_stated","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"My Notes Safe","requires_auth":"none","summary":"Attackers can crash My Notes Safe by pasting excessively long character strings into note fields, causing a denial of service.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[],"cvss":{"score":8.7,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-789","name":"Memory Allocation with Excessive Size Value"}],"description":"My Notes Safe 5.3 contains a denial of service vulnerability that allows attackers to crash the application by pasting excessively long character strings into note fields. Attackers can generate a payload containing 350000 repeated characters and paste it twice into a new note to trigger an application crash.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":null,"headline":"My Notes Safe 5.3 Denial of Service via Buffer Overflow","id":"CVE-2021-47971","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"denial_of_service","year":"2021"},"n_packages":0,"n_references":2,"next":{"headline":"Sticky Notes \u0026 Color Widgets 1.4.2 Denial of Service","id":"CVE-2021-47972"},"packages":[],"prev":{"headline":"Macaron Notes 5.5 Denial of Service via Buffer Overflow","id":"CVE-2021-47970"},"products":["My Notes Safe"],"published":"2026-05-16","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":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-05-18","vendors":["my-notes-safe"]},"summary":"Attackers can crash My Notes Safe by pasting excessively long character strings into note fields, causing a denial of service.","url":"https://insights.sbomify.com/CVE-2021-47971/"}