{"answers":{"affected":"9 open source packages ship an affected version, including github.com/traefik/traefik, github.com/traefik/traefik/v2 and github.com/traefik/traefik/v3. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-29777 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2026-29777 is a medium-severity code injection vulnerability in Traefik Traefik, published on 11 Mar 2026. An attacker needs administrator access to exploit it, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-29777 and fix it if it is affected.\n\nWhat it is: CVE-2026-29777 is a medium-severity code injection vulnerability in Traefik Traefik, published on 11 Mar 2026. An attacker needs administrator access to exploit it, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-29777 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- github.com/traefik/traefik (Go): affected all versions; no fix listed\n- github.com/traefik/traefik (Go): affected all versions up to 1.7.34; no fix listed\n- github.com/traefik/traefik (Go): affected all versions up to 1.7.34; no fix listed\n- github.com/traefik/traefik/v2 (Go): affected all versions; no fix listed\n- github.com/traefik/traefik/v2 (Go): affected all versions up to 2.11.40; no fix listed\n- github.com/traefik/traefik/v2 (Go): affected all versions up to 2.11.40; no fix listed\n- github.com/traefik/traefik/v3 (Go): affected all versions; fixed in 3.6.10\n- github.com/traefik/traefik/v3 (Go): affected all versions; fixed in 3.6.10\n- github.com/traefik/traefik/v3 (Go): affected all versions; fixed in 3.6.10\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-2026-29777/ (Markdown: https://insights.sbomify.com/CVE-2026-29777/index.md)","id":"CVE-2026-29777","markdown":"https://insights.sbomify.com/CVE-2026-29777/index.md","name":"CVE-2026-29777","record":{"aliases":["GHSA-8q2w-wr49-whqj","GO-2026-4679","MINI-g8f9-rfjc-3fmc","MINI-jm7w-749h-gh8r","MINI-w6vg-3mm8-6834"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["security_bypass","data_read"],"network_reachable":"yes","non_default_config":true,"product_category":"Traefik reverse proxy","requires_auth":"high_privilege","summary":"Attackers with HTTPRoute write access can inject rule tokens to bypass hostname constraints and redirect traffic to malicious backends.","user_interaction":"not_required","vuln_class":"code_injection"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"traefik","vendor":"traefik"}],"cvss":{"score":6.1,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-74","name":"Improper Neutralization of Special Elements in Output Used by a Downstream Component"}],"description":"Traefik is an HTTP reverse proxy and load balancer. Prior to 3.6.10, A tenant with write access to an HTTPRoute resource can inject backtick-delimited rule tokens into Traefik's router rule language via unsanitized header or query parameter match values. In shared gateway deployments, this can bypass listener hostname constraints and redirect traffic for victim hostnames to attacker-controlled backends. This vulnerability is fixed in 3.6.10.","ecosystems":["Go"],"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":"Traefik has a kubernetes gateway rule injection via unescaped backticks in HTTPRoute match values","id":"CVE-2026-29777","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":"traefik:traefik","products":["traefik:traefik"],"type":"code_injection","year":"2026"},"n_packages":9,"n_references":2,"next":{"headline":"pyLoad: Arbitrary File Write via Path Traversal in edit_package()","id":"CVE-2026-29778"},"packages":[{"ecosystem":"Go","fixed":[],"introduced":["0"],"last_affected":[],"package":"github.com/traefik/traefik","purl":"pkg:golang/github.com/traefik/traefik","source":"GO-2026-4679"},{"ecosystem":"Go","fixed":[],"introduced":["0"],"last_affected":["1.7.34"],"package":"github.com/traefik/traefik","purl":null,"source":"GHSA-8q2w-wr49-whqj"},{"ecosystem":"Go","fixed":[],"introduced":["0"],"last_affected":["1.7.34"],"package":"github.com/traefik/traefik","purl":"pkg:golang/github.com/traefik/traefik","source":"GHSA-8q2w-wr49-whqj"},{"ecosystem":"Go","fixed":[],"introduced":["0"],"last_affected":[],"package":"github.com/traefik/traefik/v2","purl":"pkg:golang/github.com/traefik/traefik/v2","source":"GO-2026-4679"},{"ecosystem":"Go","fixed":[],"introduced":["0"],"last_affected":["2.11.40"],"package":"github.com/traefik/traefik/v2","purl":null,"source":"GHSA-8q2w-wr49-whqj"},{"ecosystem":"Go","fixed":[],"introduced":["0"],"last_affected":["2.11.40"],"package":"github.com/traefik/traefik/v2","purl":"pkg:golang/github.com/traefik/traefik/v2","source":"GHSA-8q2w-wr49-whqj"},{"ecosystem":"Go","fixed":["3.6.10"],"introduced":["0"],"last_affected":[],"package":"github.com/traefik/traefik/v3","purl":null,"source":"GHSA-8q2w-wr49-whqj"},{"ecosystem":"Go","fixed":["3.6.10"],"introduced":["0"],"last_affected":[],"package":"github.com/traefik/traefik/v3","purl":"pkg:golang/github.com/traefik/traefik/v3","source":"GHSA-8q2w-wr49-whqj"},{"ecosystem":"Go","fixed":["3.6.10"],"introduced":["0"],"last_affected":[],"package":"github.com/traefik/traefik/v3","purl":"pkg:golang/github.com/traefik/traefik/v3","source":"GO-2026-4679"}],"prev":{"headline":"FreeRDP has an Integer Underflow in update_read_cache_bitmap_order Function of FreeRDP's Core Library","id":"CVE-2026-29776"},"products":["traefik"],"published":"2026-03-11","related":[{"cvss_score":9.8,"headline":"HTTP client can remove the X-Forwarded headers in Traefik","id":"CVE-2024-45410","kev_date_added":null,"published":"2024-09-19"},{"cvss_score":9.3,"headline":"Traefik v3.7.0 Authentication Bypass via from-to-www-redirect","id":"CVE-2026-88877","kev_date_added":null,"published":"2026-09-10"},{"cvss_score":9.3,"headline":"Traefik before v2.11.55 and v3.0.0 through v3.7.10 Authentication Bypass via digestAuth","id":"CVE-2026-85595","kev_date_added":null,"published":"2026-09-04"},{"cvss_score":9.1,"headline":"Traefik HTTP/3 Backend NTLM Connection Reuse","id":"CVE-2026-88007","kev_date_added":null,"published":"2026-09-10"},{"cvss_score":8.8,"headline":"Traefik: Rootless HTTP/1 request-target routes as \"/\" but is forwarded verbatim, bypassing path-scoped routing, middleware guards and access logging","id":"CVE-2026-88009","kev_date_added":null,"published":"2026-09-10"},{"cvss_score":8.8,"headline":"Traefik has a possible vulnerability with the path matchers","id":"CVE-2025-32431","kev_date_added":null,"published":"2025-04-21"},{"cvss_score":8.2,"headline":"Traefik v3.7 Authentication Bypass via TLS Option Conflict","id":"CVE-2026-85596","kev_date_added":null,"published":"2026-09-04"}],"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":"CC BY 4.0","name":"Go Vulnerability Database","prefix":"GO"},{"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":"2026-03-11","vendors":["traefik"]},"summary":"Attackers with HTTPRoute write access can inject rule tokens to bypass hostname constraints and redirect traffic to malicious backends.","url":"https://insights.sbomify.com/CVE-2026-29777/"}