{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-21620 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2026-21620 is a low-severity path traversal vulnerability in Erlang OTP, published on 20 Feb 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-21620 and fix it if it is affected.\n\nWhat it is: CVE-2026-21620 is a low-severity path traversal vulnerability in Erlang OTP, published on 20 Feb 2026. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-21620 in the wild and no public exploit code.\n\nAffected product: Erlang OTP. 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-2026-21620/ (Markdown: https://insights.sbomify.com/CVE-2026-21620/index.md)","id":"CVE-2026-21620","markdown":"https://insights.sbomify.com/CVE-2026-21620/index.md","name":"CVE-2026-21620","record":{"aliases":["AZL-78278","AZL-78285","DEBIAN-CVE-2026-21620","EEF-CVE-2026-21620","GHSA-hmrc-prh3-rpvp","OESA-2026-2703","OESA-2026-2705","UBUNTU-CVE-2026-21620"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["data_read","data_modify"],"network_reachable":"yes","non_default_config":false,"product_category":"Erlang OTP TFTP","requires_auth":"low_privilege","summary":"Attackers can exploit relative path traversal in Erlang OTP's TFTP module to read or modify arbitrary files on the server.","user_interaction":"not_required","vuln_class":"path_traversal"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"EEF","cpe":[],"cvss":{"score":2.3,"severity":"low","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-23","name":"Relative Path Traversal"}],"description":"Relative Path Traversal, Improper Isolation or Compartmentalization vulnerability in erlang otp erlang/otp (tftp_file modules), erlang otp inets (tftp_file modules), erlang otp tftp (tftp_file modules) allows Relative Path Traversal. This vulnerability is associated with program files lib/tftp/src/tftp_file.erl, src/tftp_file.erl.\n\nThis issue affects OTP from OTP 17.0 before OTP 28.3.2, OTP 27.3.4.8 and OTP 26.2.5.17, corresponding to tftp from 1.0 before 1.2.4, 1.2.2.1 and 1.1.1.1; also inets from 5.10 before 7.0.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"TFTP Path Traversal","id":"CVE-2026-21620","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"path_traversal","year":"2026"},"n_packages":0,"n_references":8,"next":{"headline":"Improper Scope Enforcement in OAuth client_credentials Flow Allows Read-Only API Key to Escalate to Full Access","id":"CVE-2026-21621"},"packages":[],"prev":{"headline":"Unsafe Deserialization of Erlang Terms in hex_core","id":"CVE-2026-21619"},"products":["OTP"],"published":"2026-02-20","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":"partial"},"state":"PUBLISHED","updated":"2026-07-24","vendors":["Erlang"]},"summary":"Attackers can exploit relative path traversal in Erlang OTP's TFTP module to read or modify arbitrary files on the server.","url":"https://insights.sbomify.com/CVE-2026-21620/"}