{"answers":{"affected":"16 open source packages ship an affected version, including symfony/http-kernel and symfony/symfony. It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2015-4050 exists.","fix":"Upgrade symfony/http-kernel to a fixed version for your release line: 2.3.29, 2.5.12 or 2.6.8.","what":"CVE-2015-4050 is a medium-severity vulnerability in Sensiolabs Symfony, published on 2 Jun 2015. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2015-4050 and fix it if it is affected.\n\nWhat it is: CVE-2015-4050 is a medium-severity vulnerability in Sensiolabs Symfony, published on 2 Jun 2015. 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-2015-4050 exists.\n\nAffected packages and fixed versions:\n- symfony/http-kernel (Packagist): affected from 2.3.19; fixed in 2.3.29\n- symfony/http-kernel (Packagist): affected from 2.3.19; fixed in 2.3.29\n- symfony/http-kernel (Packagist): affected from 2.4.9 up to 2.4.10; no fix listed\n- symfony/http-kernel (Packagist): affected from 2.4.9 up to 2.4.10; no fix listed\n- symfony/http-kernel (Packagist): affected from 2.5.4; fixed in 2.5.12\n- symfony/http-kernel (Packagist): affected from 2.5.4; fixed in 2.5.12\n- symfony/http-kernel (Packagist): affected from 2.6.0; fixed in 2.6.8\n- symfony/http-kernel (Packagist): affected from 2.6.0; fixed in 2.6.8\n- symfony/symfony (Packagist): affected from 2.3.19; fixed in 2.3.29\n- symfony/symfony (Packagist): affected from 2.3.19; fixed in 2.3.29\n- symfony/symfony (Packagist): affected from 2.4.9 up to 2.4.10; no fix listed\n- symfony/symfony (Packagist): affected from 2.4.9 up to 2.4.10; no fix listed\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-2015-4050/ (Markdown: https://insights.sbomify.com/CVE-2015-4050/index.md)","id":"CVE-2015-4050","markdown":"https://insights.sbomify.com/CVE-2015-4050/index.md","name":"CVE-2015-4050","record":{"aliases":["DEBIAN-CVE-2015-4050","DSA-3276-1","GHSA-qmqw-mpqp-mr54"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":true,"product_category":"Symfony HttpKernel","requires_auth":"none","summary":"Remote attackers can bypass URL signing and security rules in Symfony applications if ESI or SSI support is enabled.","user_interaction":"not_required","vuln_class":"security_feature_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","cpe":[{"product":"symfony","vendor":"sensiolabs"}],"cvss":{"score":4.3,"severity":"medium","source":"nvd","vector":"AV:N/AC:M/Au:N/C:N/I:P/A:N","version":"2.0"},"cwes":[{"id":"CWE-284","name":"Improper Access Control"}],"description":"FragmentListener in the HttpKernel component in Symfony 2.3.19 through 2.3.28, 2.4.9 through 2.4.10, 2.5.4 through 2.5.11, and 2.6.0 through 2.6.7, when ESI or SSI support enabled, does not check if the _controller attribute is set, which allows remote attackers to bypass URL signing and security rules by including (1) no hash or (2) an invalid hash in a request to /_fragment.","ecosystems":["Packagist"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":1,"refs":[{"date":null,"kind":"nuclei","ref":"http/cves/2015/CVE-2015-4050.yaml","stars":null,"title":"Symfony - Authentication Bypass"}],"tier":"weaponised"},"has_fix":true,"headline":"Symfony Incorrect Access Control","id":"CVE-2015-4050","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Packagist","product":"sensiolabs:symfony","products":["sensiolabs:symfony"],"type":"security_feature_bypass","year":"2015"},"n_packages":16,"n_references":6,"next":{"headline":"Missing authorization in n/a","id":"CVE-2015-4051"},"packages":[{"ecosystem":"Packagist","fixed":["2.3.29"],"introduced":["2.3.19"],"last_affected":[],"package":"symfony/http-kernel","purl":null,"source":"GHSA-qmqw-mpqp-mr54"},{"ecosystem":"Packagist","fixed":["2.3.29"],"introduced":["2.3.19"],"last_affected":[],"package":"symfony/http-kernel","purl":"pkg:composer/symfony/http-kernel","source":"GHSA-qmqw-mpqp-mr54"},{"ecosystem":"Packagist","fixed":[],"introduced":["2.4.9"],"last_affected":["2.4.10"],"package":"symfony/http-kernel","purl":null,"source":"GHSA-qmqw-mpqp-mr54"},{"ecosystem":"Packagist","fixed":[],"introduced":["2.4.9"],"last_affected":["2.4.10"],"package":"symfony/http-kernel","purl":"pkg:composer/symfony/http-kernel","source":"GHSA-qmqw-mpqp-mr54"},{"ecosystem":"Packagist","fixed":["2.5.12"],"introduced":["2.5.4"],"last_affected":[],"package":"symfony/http-kernel","purl":null,"source":"GHSA-qmqw-mpqp-mr54"},{"ecosystem":"Packagist","fixed":["2.5.12"],"introduced":["2.5.4"],"last_affected":[],"package":"symfony/http-kernel","purl":"pkg:composer/symfony/http-kernel","source":"GHSA-qmqw-mpqp-mr54"},{"ecosystem":"Packagist","fixed":["2.6.8"],"introduced":["2.6.0"],"last_affected":[],"package":"symfony/http-kernel","purl":null,"source":"GHSA-qmqw-mpqp-mr54"},{"ecosystem":"Packagist","fixed":["2.6.8"],"introduced":["2.6.0"],"last_affected":[],"package":"symfony/http-kernel","purl":"pkg:composer/symfony/http-kernel","source":"GHSA-qmqw-mpqp-mr54"},{"ecosystem":"Packagist","fixed":["2.3.29"],"introduced":["2.3.19"],"last_affected":[],"package":"symfony/symfony","purl":null,"source":"GHSA-qmqw-mpqp-mr54"},{"ecosystem":"Packagist","fixed":["2.3.29"],"introduced":["2.3.19"],"last_affected":[],"package":"symfony/symfony","purl":"pkg:composer/symfony/symfony","source":"GHSA-qmqw-mpqp-mr54"},{"ecosystem":"Packagist","fixed":[],"introduced":["2.4.9"],"last_affected":["2.4.10"],"package":"symfony/symfony","purl":null,"source":"GHSA-qmqw-mpqp-mr54"},{"ecosystem":"Packagist","fixed":[],"introduced":["2.4.9"],"last_affected":["2.4.10"],"package":"symfony/symfony","purl":"pkg:composer/symfony/symfony","source":"GHSA-qmqw-mpqp-mr54"},{"ecosystem":"Packagist","fixed":["2.5.12"],"introduced":["2.5.4"],"last_affected":[],"package":"symfony/symfony","purl":null,"source":"GHSA-qmqw-mpqp-mr54"},{"ecosystem":"Packagist","fixed":["2.5.12"],"introduced":["2.5.4"],"last_affected":[],"package":"symfony/symfony","purl":"pkg:composer/symfony/symfony","source":"GHSA-qmqw-mpqp-mr54"},{"ecosystem":"Packagist","fixed":["2.6.8"],"introduced":["2.6.0"],"last_affected":[],"package":"symfony/symfony","purl":null,"source":"GHSA-qmqw-mpqp-mr54"},{"ecosystem":"Packagist","fixed":["2.6.8"],"introduced":["2.6.0"],"last_affected":[],"package":"symfony/symfony","purl":"pkg:composer/symfony/symfony","source":"GHSA-qmqw-mpqp-mr54"}],"prev":{"headline":"Memory corruption in n/a","id":"CVE-2015-4049"},"products":["n/a"],"published":"2015-06-02","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)"},{"class":"attribution","licence":"MIT","name":"Nuclei templates"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2024-08-06","vendors":["n/a"]},"summary":"Remote attackers can bypass URL signing and security rules in Symfony applications if ESI or SSI support is enabled.","url":"https://insights.sbomify.com/CVE-2015-4050/"}