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Security: Upgrade insecure HTTP links to HTTPS and add SRI to external stylesheet#1

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devin/1782155876-security-fixes
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Security: Upgrade insecure HTTP links to HTTPS and add SRI to external stylesheet#1
devin-ai-integration[bot] wants to merge 1 commit into
masterfrom
devin/1782155876-security-fixes

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Summary

Security hardening for the static HTML documentation page. Three fixes:

  1. Subresource Integrity (SRI) added to the external stackedit.io/style.css stylesheet — prevents supply-chain attacks if the CDN is compromised.
  2. HTTP → HTTPS for handlebarsjs.com link — eliminates mixed-content risk and man-in-the-middle exposure.
  3. HTTP → HTTPS (+ canonical URL) for meta.math.stackexchange.com link — same rationale; also updates to the current canonical domain math.meta.stackexchange.com.

Full audit findings

Category Result
Hardcoded API keys / secrets None found
SQL injection N/A — no backend code
Unvalidated user input N/A — static HTML only
Insecure dependencies External stylesheet lacked SRI (fixed)
Overly permissive CORS N/A — no server config
Exposed debug endpoints None found
Missing authentication checks N/A — no auth-gated content
Insecure HTTP links 2 links used http:// (fixed)

Link to Devin session: https://app.devin.ai/sessions/5ac2f341d73f4d579a56271938a4b426
Requested by: @SunilParisi123

…lesheet

- Upgrade http://handlebarsjs.com/ to https://handlebarsjs.com/
- Upgrade http://meta.math.stackexchange.com/... to https://math.meta.stackexchange.com/... (canonical URL)
- Add Subresource Integrity (SRI) hash to stackedit.io external stylesheet

Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
@SunilParisi123 SunilParisi123 self-assigned this Jun 22, 2026
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