{"answers":{"affected":"2 open source packages ship an affected version, including nginx and nginx-gateway. It affects 2 products.","exploited":"There is no known exploitation of CVE-2026-28753 in the wild and no public exploit code.","fix":"Upgrade nginx to a fixed version for your release line: 1.28.3 or 1.29.7.","what":"CVE-2026-28753 is a medium-severity vulnerability in F5 NGINX Open Source, published on 24 Mar 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-2026-28753 and fix it if it is affected.\n\nWhat it is: CVE-2026-28753 is a medium-severity vulnerability in F5 NGINX Open Source, published on 24 Mar 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-2026-28753 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- nginx (Bitnami): affected from 0.6.27; fixed in 1.28.3, 1.29.7\n- nginx-gateway (Bitnami): affected from 0.6.27; fixed in 1.28.3, 1.29.7\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-2026-28753/ (Markdown: https://insights.sbomify.com/CVE-2026-28753/index.md)","id":"CVE-2026-28753","markdown":"https://insights.sbomify.com/CVE-2026-28753/index.md","name":"CVE-2026-28753","record":{"aliases":["ALPINE-CVE-2026-28753","AZL-80780","BELL-CVE-2026-28753","BIT-nginx-2026-28753","BIT-nginx-gateway-2026-28753","DEBIAN-CVE-2026-28753","ECHO-c2a8-5145-c36a","GHSA-ggr6-fmr8-2m8g","MINI-5r9w-mm8w-j4cp","MINI-7gvr-mgj8-5mh9","MINI-fpfx-x5rv-x555","MINI-vr4h-4hf4-f575","UBUNTU-CVE-2026-28753"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["data_modify","security_bypass"],"network_reachable":"yes","non_default_config":true,"product_category":"NGINX mail proxy","requires_auth":"none","summary":"Attacker-controlled DNS servers can inject headers into SMTP requests via NGINX mail proxy, enabling request manipulation.","user_interaction":"not_required","vuln_class":"other"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"f5","cpe":[{"product":"nginx_open_source","vendor":"f5"},{"product":"nginx_plus","vendor":"f5"}],"cvss":{"score":6.3,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:N/AC:H/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":"NGINX Plus and NGINX Open Source have a vulnerability in the ngx_mail_smtp_module module due to the improper handling of CRLF sequences in DNS responses. This allows an attacker-controlled DNS server to inject arbitrary headers into SMTP upstream requests, leading to potential request manipulation. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.","ecosystems":["Bitnami"],"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":"NGINX ngx_mail_proxy_module vulnerability","id":"CVE-2026-28753","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Bitnami","product":null,"products":[],"type":"other","year":"2026"},"n_packages":2,"n_references":1,"next":{"headline":"Stored XSS Vulnerability","id":"CVE-2026-28754"},"packages":[{"ecosystem":"Bitnami","fixed":["1.28.3","1.29.7"],"introduced":["0.6.27","1.29.0"],"last_affected":[],"package":"nginx","purl":"pkg:bitnami/nginx","source":"BIT-nginx-2026-28753"},{"ecosystem":"Bitnami","fixed":["1.28.3","1.29.7"],"introduced":["0.6.27","1.29.0"],"last_affected":[],"package":"nginx-gateway","purl":"pkg:bitnami/nginx-gateway","source":"BIT-nginx-gateway-2026-28753"}],"prev":{"headline":"filemanagement_storage_service has an improper input validation vulnerability","id":"CVE-2026-28751"},"products":["NGINX Open Source","NGINX Plus"],"published":"2026-03-24","related":[{"cvss_score":8.8,"headline":"NGINX ngx_http_dav_module vulnerability","id":"CVE-2026-27654","kev_date_added":null,"published":"2026-03-24"},{"cvss_score":8.7,"headline":"NGINX ngx_mail_auth_http_module vulnerability","id":"CVE-2026-27651","kev_date_added":null,"published":"2026-03-24"},{"cvss_score":8.5,"headline":"NGINX ngx_http_mp4_module vulnerability","id":"CVE-2026-27784","kev_date_added":null,"published":"2026-03-24"},{"cvss_score":8.5,"headline":"NGINX ngx_http_mp4_module vulnerability","id":"CVE-2026-32647","kev_date_added":null,"published":"2026-03-24"},{"cvss_score":7.5,"headline":"NGINX HTTP/3 QUIC vulnerability","id":"CVE-2024-24989","kev_date_added":null,"published":"2024-02-14"},{"cvss_score":7.5,"headline":"NGINX HTTP/3 QUIC vulnerability","id":"CVE-2024-24990","kev_date_added":null,"published":"2024-02-14"},{"cvss_score":6.5,"headline":"NGINX HTTP/3 QUIC vulnerability","id":"CVE-2024-32760","kev_date_added":null,"published":"2024-05-29"}],"sources":[{"class":"attribution","licence":"Apache-2.0","name":"Bitnami","prefix":"BIT"},{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"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":"2026-03-24","vendors":["F5"]},"summary":"Attacker-controlled DNS servers can inject headers into SMTP requests via NGINX mail proxy, enabling request manipulation.","url":"https://insights.sbomify.com/CVE-2026-28753/"}