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Code Issues 3.0k Packages Projects Releases 58 Wiki Activity

[PR #6477] [MERGED] docs: add guidance on avoiding Nginx header collisions for COOP/COEP #96452

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opened 2026-05-26 12:28:25 -05:00 by GiteaMirror · 0 comments
GiteaMirror commented 2026-05-26 12:28:25 -05:00
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📋 Pull Request Information

Original PR: https://github.com/actualbudget/actual/pull/6477
Author: @lagathub
Created: 12/23/2025
Status: ✅ Merged
Merged: 1/5/2026
Merged by: @MikesGlitch

Base: master ← Head: patch-1

📝 Commits (7)

  • e157786 fix-nginx-header-collision
  • d2498bd Fix formatting of headers in NGINX documentation
  • 32737c6 Add new terms to spelling expectations
  • 6d020a2 Fix placement of 'COOP' in expect.txt
  • ac0c2ba Merge branch 'master' into patch-1
  • d063158 Update reverse-proxies.md doc display
  • b2b159e Merge branch 'master' into patch-1

📊 Changes

2 files changed (+27 additions, -0 deletions)

View changed files

📝 .github/actions/docs-spelling/expect.txt (+2 -0)
📝 packages/docs/docs/config/reverse-proxies.md (+25 -0)

📄 Description

The current Nginx documentation notes that "additional security mechanisms" should be implemented but doesn't specify the pitfalls of manual header management.

In modern deployments, actual-server sends its own COOP/COEP headers. When a user adds these manually in Nginx (as often required for SSL/Secure Contexts), it results in duplicated headers which browsers reject, causing a fatal app crash.

This PR adds a recommendation to use proxy_hide_header to ensure Nginx serves as the single source of truth for security policies, preventing the SharedArrayBufferMissing error.

Summary by CodeRabbit

  • Documentation
    • Added guidance on NGINX cross-origin isolation, risks from duplicated COOP/COEP headers and potential SharedArrayBufferMissing.
    • Documented using NGINX as the authoritative source for security headers, how to prevent header duplication (e.g., hiding proxied headers) and included a complete example location block.
    • Added COEP and COOP to the documentation spelling/expect list.

✏️ Tip: You can customize this high-level summary in your review settings.

🔄 This issue represents a GitHub Pull Request. It cannot be merged through Gitea due to API limitations.

## 📋 Pull Request Information **Original PR:** https://github.com/actualbudget/actual/pull/6477 **Author:** [@lagathub](https://github.com/lagathub) **Created:** 12/23/2025 **Status:** ✅ Merged **Merged:** 1/5/2026 **Merged by:** [@MikesGlitch](https://github.com/MikesGlitch) **Base:** `master` ← **Head:** `patch-1` --- ### 📝 Commits (7) - [`e157786`](https://github.com/actualbudget/actual/commit/e157786234aa395cc6243d2262e6e5718b64a85d) fix-nginx-header-collision - [`d2498bd`](https://github.com/actualbudget/actual/commit/d2498bd3a4511bbeb841742e00f351de85be5232) Fix formatting of headers in NGINX documentation - [`32737c6`](https://github.com/actualbudget/actual/commit/32737c64ea9614ec021371c63a0e4480df5dcf2f) Add new terms to spelling expectations - [`6d020a2`](https://github.com/actualbudget/actual/commit/6d020a25b56be57206a9f9720063d50db53a575e) Fix placement of 'COOP' in expect.txt - [`ac0c2ba`](https://github.com/actualbudget/actual/commit/ac0c2baded0e1b7a4046e5afe6adc136aa1e7ca4) Merge branch 'master' into patch-1 - [`d063158`](https://github.com/actualbudget/actual/commit/d06315812275a5d0c045426edee7e09ac24d8cd5) Update reverse-proxies.md doc display - [`b2b159e`](https://github.com/actualbudget/actual/commit/b2b159eabc935f535a1dd3128948502568af1c96) Merge branch 'master' into patch-1 ### 📊 Changes **2 files changed** (+27 additions, -0 deletions) <details> <summary>View changed files</summary> 📝 `.github/actions/docs-spelling/expect.txt` (+2 -0) 📝 `packages/docs/docs/config/reverse-proxies.md` (+25 -0) </details> ### 📄 Description The current Nginx documentation notes that "additional security mechanisms" should be implemented but doesn't specify the pitfalls of manual header management. In modern deployments, actual-server sends its own COOP/COEP headers. When a user adds these manually in Nginx (as often required for SSL/Secure Contexts), it results in duplicated headers which browsers reject, causing a fatal app crash. This PR adds a recommendation to use proxy_hide_header to ensure Nginx serves as the single source of truth for security policies, preventing the SharedArrayBufferMissing error. <!-- This is an auto-generated comment: release notes by coderabbit.ai --> ## Summary by CodeRabbit * **Documentation** * Added guidance on NGINX cross-origin isolation, risks from duplicated COOP/COEP headers and potential SharedArrayBufferMissing. * Documented using NGINX as the authoritative source for security headers, how to prevent header duplication (e.g., hiding proxied headers) and included a complete example location block. * Added COEP and COOP to the documentation spelling/expect list. <sub>✏️ Tip: You can customize this high-level summary in your review settings.</sub> <!-- end of auto-generated comment: release notes by coderabbit.ai --> --- <sub>🔄 This issue represents a GitHub Pull Request. It cannot be merged through Gitea due to API limitations.</sub>
GiteaMirror added the pull-request label 2026-05-26 12:28:25 -05:00
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Reference: github-starred/actual#96452