{"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-2026-110869 exists.","fix":"Upgrade nodemailer to 10.0.13 or later.","what":"CVE-2026-110869 is a high-severity denial of service 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-2026-110869 and fix it if it is affected.\n\nWhat it is: CVE-2026-110869 is a high-severity denial of service 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-2026-110869 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-2026-110869/ (Markdown: https://insights.sbomify.com/CVE-2026-110869/index.md)","id":"CVE-2026-110869","markdown":"https://insights.sbomify.com/CVE-2026-110869/index.md","name":"CVE-2026-110869","record":{"aliases":["DEBIAN-CVE-2026-110869","ECHO-2ec1-76e4-8d52","GHSA-4ffr-jq9g-5ffx","GHSA-mgrc-5q39-2h34","UBUNTU-CVE-2026-110869"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Node.js email library","requires_auth":"none","summary":"A malicious SMTP server can cause a denial of service in Nodemailer by triggering quadratic backtracking in regexes during EHLO response parsing.","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-1333","name":"Inefficient Regular Expression Complexity"}],"description":"Nodemailer 3.0.0 before 10.0.13 has a regular expression denial of service in SMTPConnection._actionEHLO, whose four AUTH mechanism detection regexes contain overlapping whitespace sub-patterns that backtrack quadratically. A malicious or man-in-the-middle SMTP server can reply to EHLO with 250-AUTH, a long whitespace run and a non-matching token, blocking the Node.js event loop for tens of seconds to hours before authentication.","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 3.0.0 before 10.0.13 ReDoS via SMTP AUTH Mechanism Detection Regexes","id":"CVE-2026-110869","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":2,"n_references":2,"next":{"headline":"Nodemailer before 10.0.13 Improper Input Validation via Angle-Bracket Address Comments","id":"CVE-2026-110870"},"packages":[{"ecosystem":"npm","fixed":["10.0.13"],"introduced":["3.0.0"],"last_affected":[],"package":"nodemailer","purl":null,"source":"GHSA-4ffr-jq9g-5ffx"},{"ecosystem":"npm","fixed":["10.0.13"],"introduced":["3.0.0"],"last_affected":[],"package":"nodemailer","purl":"pkg:npm/nodemailer","source":"GHSA-4ffr-jq9g-5ffx"}],"prev":{"headline":"Renovate before 44.79.0 SSRF via HTTP Preset URLs and customDatasources","id":"CVE-2026-110868"},"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":"2026-10-15","vendors":["nodemailer"]},"summary":"A malicious SMTP server can cause a denial of service in Nodemailer by triggering quadratic backtracking in regexes during EHLO response parsing.","url":"https://insights.sbomify.com/CVE-2026-110869/"}