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  4. CVE 2026 105766 chainguard academy edu nginx directory redirect
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Back to active CVEs
Low · CVSS 2.3CVE-2026-105766

Chainguard Academy (edu) Nginx directory redirect downgrades HTTPS requests to HTTPCVE-2026-105766

Answer in brief

CVE-2026-105766 records a Low severity (CVSS 2.3) vulnerability in Chainguard Academy (edu) Nginx directory redirect downgrades HTTPS requests to HTTP. The current sources do not mark it as known exploited. The current feed maps Chainguard/Chainguard Academy (edu) (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 5, 2026Updated Oct 5, 2026Source checked Oct 5, 2026First seen by HOL Oct 5, 2026Material review Oct 5, 2026
Upstream Advisory

Key facts

Risk
Low · CVSS 2.3
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 2.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Chainguard/Chainguard Academy (edu) (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Chainguard/Chainguard Academy (edu)generic>=0b75ff98057f69b044a3e7194e428066ac5ad0d4 <93dc0e50739c225f5aee2e803800a47fc0feb90693dc0e50739c225f5aee2e803800a47fc0feb906

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Chainguard/Chainguard Academy (edu).
  2. 2Review the reported fix. Source-reported solution: Fixed in commit 93dc0e50739c225f5aee2e803800a47fc0feb906, which hardcodes the https scheme in the redirect. The fix is deployed to edu.chainguard.dev; no user action is required.

Evidence timeline and material changes

  1. Published upstream

    Oct 5, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 5, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 5, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
Upstream source 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.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Chainguard Academy (edu) integrate-platform-docs composite action interpolates inputs into shell commandsSame chainguard/chainguard academy (edu) package
  • Newell Brands DYMO ID document parsing failing file type extension authentication checkSame generic ecosystem
  • Newell Brands DYMO ID parent directory open to path traversal through improper spheres of controlSame generic ecosystem
  • Sssd: sssd: denial of service via out-of-bounds read in autofs responderSame generic ecosystem
  • Sssd: sssd: denial of service via out-of-bounds read during passkey parsingSame generic ecosystem
  • feelec-yishu feelcrm-os Member Endpoint MemberController.class.php index sql injectionSame generic ecosystem

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
CWE-319
Source
CVE List V5
Source checked
Oct 5, 2026
References
2 linked sources
Open source record