{"answers":{"affected":"2 open source packages ship an affected version, including nodemailer.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-110870 exists.","fix":"Upgrade nodemailer to 10.0.13 or later.","what":"CVE-2026-110870 is a medium-severity vulnerability in nodemailer, published on 14 Oct 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-2026-110870 and fix it if it is affected.\n\nWhat it is: CVE-2026-110870 is a medium-severity vulnerability in nodemailer, published on 14 Oct 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-2026-110870 exists.\n\nAffected packages and fixed versions:\n- nodemailer (npm): affected from 3.0.0; fixed in 10.0.13\n- nodemailer (npm): affected from 3.0.0; fixed in 10.0.13\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-2026-110870/ (Markdown: https://insights.sbomify.com/CVE-2026-110870/index.md)","id":"CVE-2026-110870","markdown":"https://insights.sbomify.com/CVE-2026-110870/index.md","name":"CVE-2026-110870","record":{"aliases":["CLSA-2026-1793180903","CLSA-2026-1793183905","CLSA-2026-1793187944","CLSA-2026-1793207112","CLSA-2026-1793209433","CLSA-2026-1793215120","CLSA-2026-1793267771","DEBIAN-CVE-2026-110870","ECHO-0cfa-c395-b902","GHSA-597p-2mmq-hhg9","GHSA-g73g-hqqh-jr95","UBUNTU-CVE-2026-110870"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["security_bypass","denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Node.js email library","requires_auth":"none","summary":"Attackers can bypass domain allow-lists or cause delivery failures in Nodemailer by injecting RFC 5322 comments into email addresses.","user_interaction":"not_required","vuln_class":"other"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","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:L/VA:N/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-20","name":"Improper Input Validation"}],"description":"Nodemailer from 3.0.0 before 10.0.13 contains an improper input validation vulnerability in its address parser that fails to strip RFC 5322 comments inside angle-bracket addresses. Attackers can supply recipients like a display name with a parenthesized comment in the domain, so illegal characters reach envelope.to and RCPT TO, causing rejected delivery or parser interpretation conflicts that bypass domain allow-lists.","ecosystems":["npm"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"Nodemailer before 10.0.13 Improper Input Validation via Angle-Bracket Address Comments","id":"CVE-2026-110870","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"other","year":"2026"},"n_packages":2,"n_references":2,"next":{"headline":"Nodemailer 3.0.0 before 10.0.10 Quadratic DKIM Header Unfolding Denial of Service","id":"CVE-2026-110871"},"packages":[{"ecosystem":"npm","fixed":["10.0.13"],"introduced":["3.0.0"],"last_affected":[],"package":"nodemailer","purl":null,"source":"GHSA-g73g-hqqh-jr95"},{"ecosystem":"npm","fixed":["10.0.13"],"introduced":["3.0.0"],"last_affected":[],"package":"nodemailer","purl":"pkg:npm/nodemailer","source":"GHSA-g73g-hqqh-jr95"}],"prev":{"headline":"Nodemailer 3.0.0 before 10.0.13 ReDoS via SMTP AUTH Mechanism Detection Regexes","id":"CVE-2026-110869"},"products":["nodemailer"],"published":"2026-10-14","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"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":"2026-10-26","vendors":["nodemailer"]},"summary":"Attackers can bypass domain allow-lists or cause delivery failures in Nodemailer by injecting RFC 5322 comments into email addresses.","url":"https://insights.sbomify.com/CVE-2026-110870/"}