{"answers":{"affected":"3 open source packages ship an affected version, including hex_core. It affects 3 products.","exploited":"There is no known exploitation of CVE-2026-21619 in the wild and no public exploit code.","fix":"Upgrade hex_core to 0.12.1 or later.","what":"CVE-2026-21619 is a low-severity unsafe deserialization vulnerability in erlang hex, published on 27 Feb 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-21619 and fix it if it is affected.\n\nWhat it is: CVE-2026-21619 is a low-severity unsafe deserialization vulnerability in erlang hex, published on 27 Feb 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2026-21619 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- hex_core (Hex): affected all versions; fixed in 0.12.1\n- hex_core (Hex): affected all versions; fixed in 0.12.1\n- hex_core (Hex): affected from 0.1.0; fixed in 0.12.1\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-2026-21619/ (Markdown: https://insights.sbomify.com/CVE-2026-21619/index.md)","id":"CVE-2026-21619","markdown":"https://insights.sbomify.com/CVE-2026-21619/index.md","name":"CVE-2026-21619","record":{"aliases":["DEBIAN-CVE-2026-21619","EEF-CVE-2026-21619","GHSA-hx9w-f2w9-9g96","MGASA-2026-0196","UBUNTU-CVE-2026-21619"],"analysis":{"component_type":"developer_tool","fix_type":"upgrade","impacts":["denial_of_service","code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"Erlang package manager","requires_auth":"low_privilege","summary":"Attackers can cause denial of service or execute code via unsafe deserialization of Erlang terms in hex_core, hex, and rebar3.","user_interaction":"required","vuln_class":"deserialization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"EEF","cpe":[{"product":"rebar3","vendor":"erlang"},{"product":"hex","vendor":"hex"},{"product":"hex_core","vendor":"hex"}],"cvss":{"score":2,"severity":"low","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-502","name":"Deserialization of Untrusted Data"},{"id":"CWE-400","name":"Uncontrolled Resource Consumption"}],"description":"Uncontrolled Resource Consumption, Deserialization of Untrusted Data vulnerability in hexpm hex_core (hex_api modules), hexpm hex (mix_hex_api modules), erlang rebar3 (r3_hex_api modules) allows Object Injection, Excessive Allocation. This vulnerability is associated with program files src/hex_api.erl, src/mix_hex_api.erl, apps/rebar/src/vendored/r3_hex_api.erl and program routines hex_core:request/4, mix_hex_api:request/4, r3_hex_api:request/4.\n\nThis issue affects hex_core: from 0.1.0 before 0.12.1; hex: from 2.3.0 before 2.3.2; rebar3: from 3.9.1 before 3.27.0.","ecosystems":["Hex"],"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":"Unsafe Deserialization of Erlang Terms in hex_core","id":"CVE-2026-21619","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Hex","product":null,"products":[],"type":"deserialization","year":"2026"},"n_packages":3,"n_references":6,"next":{"headline":"TFTP Path Traversal","id":"CVE-2026-21620"},"packages":[{"ecosystem":"Hex","fixed":["0.12.1"],"introduced":["0"],"last_affected":[],"package":"hex_core","purl":null,"source":"GHSA-hx9w-f2w9-9g96"},{"ecosystem":"Hex","fixed":["0.12.1"],"introduced":["0"],"last_affected":[],"package":"hex_core","purl":"pkg:hex/hex_core","source":"GHSA-hx9w-f2w9-9g96"},{"ecosystem":"Hex","fixed":["0.12.1"],"introduced":["0.1.0"],"last_affected":[],"package":"hex_core","purl":"pkg:hex/hex_core","source":"EEF-CVE-2026-21619"}],"prev":{"headline":"Cross-site scripting (XSS) in OAuth Device Authorization screen","id":"CVE-2026-21618"},"products":["hex","hex_core","rebar3"],"published":"2026-02-27","related":[{"cvss_score":9.8,"headline":"Command injection in n/a","id":"CVE-2020-13802","kev_date_added":null,"published":"2020-09-02"},{"cvss_score":8.8,"headline":"Supply chain in n/a","id":"CVE-2019-1000014","kev_date_added":null,"published":"2019-02-04"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"Erlang Ecosystem Foundation","prefix":"EEF"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"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":"2026-05-27","vendors":["erlang","hexpm"]},"summary":"Attackers can cause denial of service or execute code via unsafe deserialization of Erlang terms in hex_core, hex, and rebar3.","url":"https://insights.sbomify.com/CVE-2026-21619/"}