RocketChat / RocketChat/Rocket.Chat
500 Internal Server Error with nginx on Ubuntu 22.04
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Description
Hi,
rocketchat 7.10.12 with latest nginx (1.18.0-6ubuntu14.13) on Ubuntu 22.04 as reverse proxy produces "500 Internal Server Error" recently. It all seems to be caused by a security update of nginx which fixes CVE-2026-49975. It might be something header related (they limited header size to 1000 for example) and maybe rocketchat produces now incomaptible headers?
https://ubuntu.com/security/CVE-2026-49975
https://changelogs.ubuntu.com/changelogs/pool/main/n/nginx/nginx_1.18.0-6ubuntu14.13/changelog
https://blog.calif.io/p/codex-discovered-a-hidden-http2-bomb
Regards
abelbabel
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- Read the whole issue, then the project's contributing guide.
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Research direction
Start by reproducing the 500 Internal Server Error with Rocket.Chat 7.10.12, nginx 1.18.0-6ubuntu14.13, and Ubuntu 22.04, then compare the nginx security update, CVE-2026-49975, and the linked changelog. Done means the reverse-proxy setup works without the 500 while retaining the security update.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- nginx, typescript, ubuntu
- Domain
- backend, infrastructure, networking
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Quiet
- Clarity
- Needs clarification
- Newbie friendliness
- 35/100