{"id":"CVE-2026-105766","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-105766","generatedAt":"2026-10-28T11:33:41.283Z","title":"Use of the backend-facing $scheme variable in the trailing-slash directory redirect in nginx.conf of Chainguard Academy (edu) from commit 0b75ff98057f69b044a3e7194e428066ac5ad0d4 before commit 93dc0e50739c225f5aee2e803800a47fc0feb906 allows an on-path…","description":"Use of the backend-facing $scheme variable in the trailing-slash directory redirect in nginx.conf of Chainguard Academy (edu) from commit 0b75ff98057f69b044a3e7194e428066ac5ad0d4 before commit 93dc0e50739c225f5aee2e803800a47fc0feb906 allows an on-path network attacker to read or modify documentation content served to a victim via an HTTPS request for a slashless directory path, because TLS terminates at the load balancer in front of Nginx and the resulting 301 response redirects the client to a plaintext http:// URL. Browsers that ship the HSTS preload list are not affected, because the .dev top-level domain is preloaded; clients that do not enforce HSTS, such as command-line HTTP clients and scripts that follow redirects, are affected.","published":"2026-10-05T20:17:21.000Z","lastModified":"2026-10-06T15:03:59.000Z","status":"Deferred","sourceIdentifier":"82cea9a6-e9e3-46fe-bdb0-3673de380178","cvss":{"version":"4.0","score":2.3,"severity":"LOW","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M"},"cwe":["CWE-319"],"affected":[],"epss":{"score":0.00106,"percentile":0.0109,"date":"2026-10-27","history":[{"date":"2026-10-06","score":0.00106,"percentile":0.01017}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.11%). Track it; it rarely justifies an emergency change on its own."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-05T20:17:21.000Z","detail":{"score":"2.3","severity":"LOW","publishedAt":"2026-10-05T20:17:20.620Z"},"summary":"New CVE, low severity (CVSS 2.3)."}],"references":[{"url":"https://github.com/chainguard-dev/edu/commit/93dc0e50739c225f5aee2e803800a47fc0feb906","source":"82cea9a6-e9e3-46fe-bdb0-3673de380178"},{"url":"https://github.com/chainguard-dev/edu/pull/3989","source":"82cea9a6-e9e3-46fe-bdb0-3673de380178"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-105766","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}