{"answers":{"affected":"16 open source packages ship an affected version, including symfony/symfony, symfony/http-client and symfony/http-foundation. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-48736 in the wild and no public exploit code.","fix":"Upgrade symfony/symfony to a fixed version for your release line: 5.4.53, 6.4.41, 7.4.13 or 8.0.13.","what":"CVE-2026-48736 is a medium-severity server-side request forgery 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-2026-48736 and fix it if it is affected.\n\nWhat it is: CVE-2026-48736 is a medium-severity server-side request forgery 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-2026-48736 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- symfony/symfony (Packagist): affected from 5.4.0; fixed in 5.4.53\n- symfony/symfony (Packagist): affected from 5.4.0; fixed in 5.4.53\n- symfony/symfony (Packagist): affected from 6.4.0; fixed in 6.4.41\n- symfony/symfony (Packagist): affected from 6.4.0; fixed in 6.4.41\n- symfony/symfony (Packagist): affected from 7.0.0; fixed in 7.4.13\n- symfony/symfony (Packagist): affected from 7.0.0; fixed in 7.4.13\n- symfony/symfony (Packagist): affected from 8.0.0; fixed in 8.0.13\n- symfony/symfony (Packagist): affected from 8.0.0; fixed in 8.0.13\n- symfony/http-client (Packagist): affected from 5.4.0; fixed in 5.4.53\n- symfony/http-client (Packagist): affected from 5.4.0; fixed in 5.4.53\n- symfony/http-foundation (Packagist): affected from 6.4.0; fixed in 6.4.41\n- symfony/http-foundation (Packagist): affected from 6.4.0; fixed in 6.4.41\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-2026-48736/ (Markdown: https://insights.sbomify.com/CVE-2026-48736/index.md)","id":"CVE-2026-48736","markdown":"https://insights.sbomify.com/CVE-2026-48736/index.md","name":"CVE-2026-48736","record":{"aliases":["DEBIAN-CVE-2026-48736","GHSA-38cx-cq6f-5755","UBUNTU-CVE-2026-48736"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["data_read","security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Symfony HTTP Client","requires_auth":"none","summary":"Attackers can bypass private network restrictions in Symfony's HTTP client using IPv6 transition forms to access internal resources.","user_interaction":"not_required","vuln_class":"ssrf"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"symfony","vendor":"sensiolabs"}],"cvss":{"score":6.9,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:L/SA:N","version":"4.0"},"cwes":[{"id":"CWE-918","name":"Server-Side Request Forgery"},{"id":"CWE-184","name":"Incomplete List of Disallowed Inputs"}],"description":"Symfony is a PHP framework for web and console applications and a set of reusable PHP components. From 5.4.0 to 5.4.53, 6.4.41, 7.4.13, and 8.0.13, NoPrivateNetworkHttpClient and IpUtils::PRIVATE_SUBNETS omitted IPv6 transition prefixes such as 6to4, NAT64, Teredo, and IPv4-compatible IPv6, allowing attacker-supplied URLs to represent private IPv4 targets in forms that IpUtils::isPrivateIp() did not block. This issue is fixed in versions 5.4.53, 6.4.41, 7.4.13, and 8.0.13.","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: IpUtils::PRIVATE_SUBNETS Omits IPv6 Transition Forms (6to4, NAT64, Teredo, IPv4-compatible): SSRF Bypass in NoPrivateNetworkHttpClient","id":"CVE-2026-48736","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Packagist","product":"sensiolabs:symfony","products":["sensiolabs:symfony"],"type":"ssrf","year":"2026"},"n_packages":16,"n_references":6,"next":{"headline":"pyLoad: SSRF guard bypass via IPv6 6to4/NAT64 transition wrappers of internal IPs","id":"CVE-2026-48737"},"packages":[{"ecosystem":"Packagist","fixed":["5.4.53"],"introduced":["5.4.0"],"last_affected":[],"package":"symfony/http-client","purl":null,"source":"GHSA-38cx-cq6f-5755"},{"ecosystem":"Packagist","fixed":["5.4.53"],"introduced":["5.4.0"],"last_affected":[],"package":"symfony/http-client","purl":"pkg:composer/symfony/http-client","source":"GHSA-38cx-cq6f-5755"},{"ecosystem":"Packagist","fixed":["6.4.41"],"introduced":["6.4.0"],"last_affected":[],"package":"symfony/http-foundation","purl":null,"source":"GHSA-38cx-cq6f-5755"},{"ecosystem":"Packagist","fixed":["6.4.41"],"introduced":["6.4.0"],"last_affected":[],"package":"symfony/http-foundation","purl":"pkg:composer/symfony/http-foundation","source":"GHSA-38cx-cq6f-5755"},{"ecosystem":"Packagist","fixed":["7.4.13"],"introduced":["7.0.0"],"last_affected":[],"package":"symfony/http-foundation","purl":null,"source":"GHSA-38cx-cq6f-5755"},{"ecosystem":"Packagist","fixed":["7.4.13"],"introduced":["7.0.0"],"last_affected":[],"package":"symfony/http-foundation","purl":"pkg:composer/symfony/http-foundation","source":"GHSA-38cx-cq6f-5755"},{"ecosystem":"Packagist","fixed":["8.0.13"],"introduced":["8.0.0"],"last_affected":[],"package":"symfony/http-foundation","purl":null,"source":"GHSA-38cx-cq6f-5755"},{"ecosystem":"Packagist","fixed":["8.0.13"],"introduced":["8.0.0"],"last_affected":[],"package":"symfony/http-foundation","purl":"pkg:composer/symfony/http-foundation","source":"GHSA-38cx-cq6f-5755"},{"ecosystem":"Packagist","fixed":["5.4.53"],"introduced":["5.4.0"],"last_affected":[],"package":"symfony/symfony","purl":null,"source":"GHSA-38cx-cq6f-5755"},{"ecosystem":"Packagist","fixed":["5.4.53"],"introduced":["5.4.0"],"last_affected":[],"package":"symfony/symfony","purl":"pkg:composer/symfony/symfony","source":"GHSA-38cx-cq6f-5755"},{"ecosystem":"Packagist","fixed":["6.4.41"],"introduced":["6.4.0"],"last_affected":[],"package":"symfony/symfony","purl":null,"source":"GHSA-38cx-cq6f-5755"},{"ecosystem":"Packagist","fixed":["6.4.41"],"introduced":["6.4.0"],"last_affected":[],"package":"symfony/symfony","purl":"pkg:composer/symfony/symfony","source":"GHSA-38cx-cq6f-5755"},{"ecosystem":"Packagist","fixed":["7.4.13"],"introduced":["7.0.0"],"last_affected":[],"package":"symfony/symfony","purl":null,"source":"GHSA-38cx-cq6f-5755"},{"ecosystem":"Packagist","fixed":["7.4.13"],"introduced":["7.0.0"],"last_affected":[],"package":"symfony/symfony","purl":"pkg:composer/symfony/symfony","source":"GHSA-38cx-cq6f-5755"},{"ecosystem":"Packagist","fixed":["8.0.13"],"introduced":["8.0.0"],"last_affected":[],"package":"symfony/symfony","purl":null,"source":"GHSA-38cx-cq6f-5755"},{"ecosystem":"Packagist","fixed":["8.0.13"],"introduced":["8.0.0"],"last_affected":[],"package":"symfony/symfony","purl":"pkg:composer/symfony/symfony","source":"GHSA-38cx-cq6f-5755"}],"prev":{"headline":"pypdf: Manipulated XMP metadata streams can exhaust RAM","id":"CVE-2026-48735"},"products":["http-client","http-foundation","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":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-07-15","vendors":["symfony"]},"summary":"Attackers can bypass private network restrictions in Symfony's HTTP client using IPv6 transition forms to access internal resources.","url":"https://insights.sbomify.com/CVE-2026-48736/"}