{"schema":"threatline.record/2","record":{"id":"CVE-2026-105766","aliases":[],"summary":"Chainguard Academy (edu) Nginx directory redirect downgrades HTTPS requests to HTTP","details":"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.","categories":["Unclassified"],"product":"Chainguard Academy (edu)","vendor":"Chainguard","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-105766","source_modified_at":"2026-10-06T13:44:09.303Z","fetched_at":"2026-10-23T18:52:38.922436Z","product":"Chainguard Academy (edu)","vendor":"Chainguard","versions":[{"status":"affected","version":"0b75ff98057f69b044a3e7194e428066ac5ad0d4","lessThan":"93dc0e50739c225f5aee2e803800a47fc0feb906","versionType":"git"}],"defaultStatus":"unaffected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-105766","source_modified_at":"2026-10-06T13:44:09.303Z","fetched_at":"2026-10-23T18:52:38.922436Z","package":{"name":"Chainguard Academy (edu)","ecosystem":null},"version":"93dc0e50739c225f5aee2e803800a47fc0feb906","basis":"first unaffected version stated in the CVE record"}],"cvss":2.3,"severity":"Low","kev":{"listed":false},"epss":{"probability":0.00106,"percentile":0.01054,"score_date":"2026-10-23"},"published_at":"2026-10-05T19:45:50.015Z","modified_at":"2026-10-06T13:44:09.303Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-105766","fetched_at":"2026-10-23T18:52:38.922436Z","source_modified_at":"2026-10-06T13:44:09.303Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-105766","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/chainguard-dev/edu/commit/93dc0e50739c225f5aee2e803800a47fc0feb906","tags":["patch"]},{"source":"CVE List","url":"https://github.com/chainguard-dev/edu/pull/3989","tags":["patch"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"none","automatable":"no","technical_impact":"partial","assessed_at":"2026-10-06T13:43:50.196822Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-06T13:44:09.303Z","content_hash":"94bceb761336fa03c77a258ed5fcc09e3f7ac99ce713364b109d3c6ad9f6df2b"}}