{"answers":{"affected":"16 open source packages ship an affected version, including symfony/mime and symfony/symfony. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-45070 in the wild and no public exploit code.","fix":"Upgrade symfony/mime to a fixed version for your release line: 5.4.52, 6.4.40, 7.4.12 or 8.0.12.","what":"CVE-2026-45070 is a medium-severity vulnerability in Sensiolabs Symfony, published on 14 Jul 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-2026-45070 and fix it if it is affected.\n\nWhat it is: CVE-2026-45070 is a medium-severity vulnerability in Sensiolabs Symfony, published on 14 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-45070 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- symfony/mime (Packagist): affected all versions; fixed in 5.4.52\n- symfony/mime (Packagist): affected all versions; fixed in 5.4.52\n- symfony/mime (Packagist): affected from 6.0.0; fixed in 6.4.40\n- symfony/mime (Packagist): affected from 6.0.0; fixed in 6.4.40\n- symfony/mime (Packagist): affected from 7.0.0; fixed in 7.4.12\n- symfony/mime (Packagist): affected from 7.0.0; fixed in 7.4.12\n- symfony/mime (Packagist): affected from 8.0.0; fixed in 8.0.12\n- symfony/mime (Packagist): affected from 8.0.0; fixed in 8.0.12\n- symfony/symfony (Packagist): affected all versions; fixed in 5.4.52\n- symfony/symfony (Packagist): affected all versions; fixed in 5.4.52\n- symfony/symfony (Packagist): affected from 6.0.0; fixed in 6.4.40\n- symfony/symfony (Packagist): affected from 6.0.0; fixed in 6.4.40\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-2026-45070/ (Markdown: https://insights.sbomify.com/CVE-2026-45070/index.md)","id":"CVE-2026-45070","markdown":"https://insights.sbomify.com/CVE-2026-45070/index.md","name":"CVE-2026-45070","record":{"aliases":["CLSA-2026-1783386119","DEBIAN-CVE-2026-45070","GHSA-vqc8-7275-q272","UBUNTU-CVE-2026-45070"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["data_modify"],"network_reachable":"yes","non_default_config":false,"product_category":"Symfony MIME component","requires_auth":"none","summary":"Attackers can inject arbitrary headers into emails by exploiting unvalidated parameter names in Symfony's MIME component, potentially altering email structure.","user_interaction":"not_required","vuln_class":"other"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"symfony","vendor":"sensiolabs"}],"cvss":{"score":6.3,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-93","name":"Improper Neutralization of CRLF Sequences"}],"description":"Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Prior to 5.4.52, 6.4.40, 7.4.12, and 8.0.12, Symfony\\Component\\Mime\\Header\\ParameterizedHeader validates and encodes parameter values but emits parameter names verbatim, allowing a caller that derives a parameter name from untrusted input to include CRLF or other non-token bytes and inject additional headers into rendered structured mail headers such as Content-Type or Content-Disposition. This issue is reported as fixed in versions 5.4.52, 6.4.40, 7.4.12, and 8.0.12.","ecosystems":["Packagist"],"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":"Symfony: Email Header Injection via Non-Token Characters in Mime Parameter Names","id":"CVE-2026-45070","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Packagist","product":"sensiolabs:symfony","products":["sensiolabs:symfony"],"type":"other","year":"2026"},"n_packages":16,"n_references":6,"next":{"headline":"Symfony: XXE (Local File Disclosure) in DomCrawler::addXmlContent() via validateOnParse = true","id":"CVE-2026-45071"},"packages":[{"ecosystem":"Packagist","fixed":["5.4.52"],"introduced":["0"],"last_affected":[],"package":"symfony/mime","purl":null,"source":"GHSA-vqc8-7275-q272"},{"ecosystem":"Packagist","fixed":["5.4.52"],"introduced":["0"],"last_affected":[],"package":"symfony/mime","purl":"pkg:composer/symfony/mime","source":"GHSA-vqc8-7275-q272"},{"ecosystem":"Packagist","fixed":["6.4.40"],"introduced":["6.0.0"],"last_affected":[],"package":"symfony/mime","purl":null,"source":"GHSA-vqc8-7275-q272"},{"ecosystem":"Packagist","fixed":["6.4.40"],"introduced":["6.0.0"],"last_affected":[],"package":"symfony/mime","purl":"pkg:composer/symfony/mime","source":"GHSA-vqc8-7275-q272"},{"ecosystem":"Packagist","fixed":["7.4.12"],"introduced":["7.0.0"],"last_affected":[],"package":"symfony/mime","purl":null,"source":"GHSA-vqc8-7275-q272"},{"ecosystem":"Packagist","fixed":["7.4.12"],"introduced":["7.0.0"],"last_affected":[],"package":"symfony/mime","purl":"pkg:composer/symfony/mime","source":"GHSA-vqc8-7275-q272"},{"ecosystem":"Packagist","fixed":["8.0.12"],"introduced":["8.0.0"],"last_affected":[],"package":"symfony/mime","purl":null,"source":"GHSA-vqc8-7275-q272"},{"ecosystem":"Packagist","fixed":["8.0.12"],"introduced":["8.0.0"],"last_affected":[],"package":"symfony/mime","purl":"pkg:composer/symfony/mime","source":"GHSA-vqc8-7275-q272"},{"ecosystem":"Packagist","fixed":["5.4.52"],"introduced":["0"],"last_affected":[],"package":"symfony/symfony","purl":null,"source":"GHSA-vqc8-7275-q272"},{"ecosystem":"Packagist","fixed":["5.4.52"],"introduced":["0"],"last_affected":[],"package":"symfony/symfony","purl":"pkg:composer/symfony/symfony","source":"GHSA-vqc8-7275-q272"},{"ecosystem":"Packagist","fixed":["6.4.40"],"introduced":["6.0.0"],"last_affected":[],"package":"symfony/symfony","purl":null,"source":"GHSA-vqc8-7275-q272"},{"ecosystem":"Packagist","fixed":["6.4.40"],"introduced":["6.0.0"],"last_affected":[],"package":"symfony/symfony","purl":"pkg:composer/symfony/symfony","source":"GHSA-vqc8-7275-q272"},{"ecosystem":"Packagist","fixed":["7.4.12"],"introduced":["7.0.0"],"last_affected":[],"package":"symfony/symfony","purl":null,"source":"GHSA-vqc8-7275-q272"},{"ecosystem":"Packagist","fixed":["7.4.12"],"introduced":["7.0.0"],"last_affected":[],"package":"symfony/symfony","purl":"pkg:composer/symfony/symfony","source":"GHSA-vqc8-7275-q272"},{"ecosystem":"Packagist","fixed":["8.0.12"],"introduced":["8.0.0"],"last_affected":[],"package":"symfony/symfony","purl":null,"source":"GHSA-vqc8-7275-q272"},{"ecosystem":"Packagist","fixed":["8.0.12"],"introduced":["8.0.0"],"last_affected":[],"package":"symfony/symfony","purl":"pkg:composer/symfony/symfony","source":"GHSA-vqc8-7275-q272"}],"prev":{"headline":"Symfony: OidcTokenHandler Accepts JWTs Missing aud/iss/exp Claims","id":"CVE-2026-45069"},"products":["mime","symfony"],"published":"2026-07-14","related":[{"cvss_score":9.8,"headline":"Improper Input Validation in Symfony","id":"CVE-2019-11325","kev_date_added":null,"published":"2019-11-21"},{"cvss_score":9.8,"headline":"Symfony Incorrect Access Control","id":"CVE-2017-11365","kev_date_added":null,"published":"2019-05-23"},{"cvss_score":9.8,"headline":"Invalid HTTP method overrides allow possible XSS or other attacks in Symfony","id":"CVE-2019-10913","kev_date_added":null,"published":"2019-05-16"},{"cvss_score":9.8,"headline":"Symfony Authentication Bypass","id":"CVE-2018-11407","kev_date_added":null,"published":"2018-06-13"},{"cvss_score":9.8,"headline":"Symfony Authentication Bypass","id":"CVE-2016-2403","kev_date_added":null,"published":"2017-02-07"},{"cvss_score":9.1,"headline":"Symfony: Identity Spoofing via Unanchored DN Regex in X509Authenticator","id":"CVE-2026-45063","kev_date_added":null,"published":"2026-07-14"},{"cvss_score":8.8,"headline":"Symfony: OidcTokenHandler Accepts JWTs Missing aud/iss/exp Claims","id":"CVE-2026-45069","kev_date_added":null,"published":"2026-07-14"}],"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":"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":"yes","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-07-16","vendors":["symfony"]},"summary":"Attackers can inject arbitrary headers into emails by exploiting unvalidated parameter names in Symfony's MIME component, potentially altering email structure.","url":"https://insights.sbomify.com/CVE-2026-45070/"}