{"answers":{"affected":"4 open source packages ship an affected version, including puma.","exploited":"There is no known exploitation of CVE-2026-47737 in the wild and no public exploit code.","fix":"Upgrade puma to a fixed version for your release line: 7.2.1 or 8.0.2.","what":"CVE-2026-47737 is a high-severity vulnerability in puma, 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-2026-47737 and fix it if it is affected.\n\nWhat it is: CVE-2026-47737 is a high-severity vulnerability in puma, 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-2026-47737 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- puma (RubyGems): affected from 5.5.0; fixed in 7.2.1\n- puma (RubyGems): affected from 5.5.0; fixed in 7.2.1\n- puma (RubyGems): affected from 8.0.0; fixed in 8.0.2\n- puma (RubyGems): affected from 8.0.0; fixed in 8.0.2\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-2026-47737/ (Markdown: https://insights.sbomify.com/CVE-2026-47737/index.md)","id":"CVE-2026-47737","markdown":"https://insights.sbomify.com/CVE-2026-47737/index.md","name":"CVE-2026-47737","record":{"aliases":["CLEANSTART-2026-CK66622","CLEANSTART-2026-OT47586","DEBIAN-CVE-2026-47737","GHSA-2vqw-3mp8-cgmx","MINI-24x8-c52w-83cr","MINI-3pfv-c45h-h6h3","MINI-66p5-wfq8-jc5q","MINI-67fc-wfr4-2ppp","MINI-736w-qcgc-5f36","MINI-77h6-p8j8-2w43","MINI-7vm2-fhh9-q9c3","MINI-922m-3w3m-jpr8","MINI-9fj5-h78h-8627","MINI-fwf2-9wx9-p4w4","MINI-g23f-x647-4q9g","MINI-gc67-qhr3-4cgm","MINI-gp4r-2wh8-2vpv","MINI-h9hj-cp8p-gfh3","MINI-hgph-vrgh-gfcx","MINI-jc4r-rj55-jp67","MINI-jj3w-wq3c-pxmj","MINI-mwhw-83m9-wg37","MINI-qfmp-862p-58mp","MINI-qhhh-c3rv-hfh9","MINI-qr22-xqx2-hfm7","MINI-qw54-p44g-3fcp","MINI-r35w-mhfq-94vm","MINI-rwpv-x32m-4r46","MINI-vq7f-xg9c-v2jq","MINI-w64m-7f3v-mmv3","UBUNTU-CVE-2026-47737"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":true,"product_category":"Ruby web server","requires_auth":"none","summary":"Attackers can spoof source IP addresses by injecting repeated PROXY protocol headers on persistent connections in Puma web server.","user_interaction":"not_required","vuln_class":"security_feature_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":7.5,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","version":"3.1"},"cwes":[{"id":"CWE-345","name":"Insufficient Verification of Data Authenticity"},{"id":"CWE-290","name":"Authentication Bypass by Spoofing"}],"description":"Puma is a Ruby/Rack web server built for parallelism. From 5.5.0 until 7.2.1 and 8.0.2, Puma is vulnerable to source IP spoofing when set_remote_address proxy_protocol: :v1 is enabled and persistent connections are used because Puma incorrectly re-parses PROXY protocol headers after each keep-alive request on the same connection, allowing an attacker to inject a second PROXY header and overwrite REMOTE_ADDR. This issue is fixed in versions 7.2.1 and 8.0.2.","ecosystems":["RubyGems"],"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":"Puma PROXY Protocol v1 Accepts Repeated Protocol Headers on Persistent Connections","id":"CVE-2026-47737","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"RubyGems","product":null,"products":[],"type":"security_feature_bypass","year":"2026"},"n_packages":4,"n_references":7,"next":{"headline":"Frappe: Stored XSS in Note","id":"CVE-2026-47739"},"packages":[{"ecosystem":"RubyGems","fixed":["7.2.1"],"introduced":["5.5.0"],"last_affected":[],"package":"puma","purl":null,"source":"GHSA-2vqw-3mp8-cgmx"},{"ecosystem":"RubyGems","fixed":["7.2.1"],"introduced":["5.5.0"],"last_affected":[],"package":"puma","purl":"pkg:gem/puma","source":"GHSA-2vqw-3mp8-cgmx"},{"ecosystem":"RubyGems","fixed":["8.0.2"],"introduced":["8.0.0"],"last_affected":[],"package":"puma","purl":null,"source":"GHSA-2vqw-3mp8-cgmx"},{"ecosystem":"RubyGems","fixed":["8.0.2"],"introduced":["8.0.0"],"last_affected":[],"package":"puma","purl":"pkg:gem/puma","source":"GHSA-2vqw-3mp8-cgmx"}],"prev":{"headline":"Puma PROXY Protocol v1 Parser Allows Remote Memory Exhaustion","id":"CVE-2026-47736"},"products":["puma"],"published":"2026-07-14","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":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-07-15","vendors":["puma"]},"summary":"Attackers can spoof source IP addresses by injecting repeated PROXY protocol headers on persistent connections in Puma web server.","url":"https://insights.sbomify.com/CVE-2026-47737/"}