element-hq/synapse

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Synapse: Matrix homeserver written in Python/Twisted + Rust

Stars: 4.6k
Forks: 600
Open beginner issues: 0
Indexed issues: 1.9k
Avg merge: 5d 6h
Merged PRs (30d): 46

Dominant language: Python
License: AGPL-3.0
Last GitHub push: Sep 14, 2026
Latest indexed: Sep 15, 2026
Contributing guide: Contributing guide
Code of conduct: No code of conduct
Beginner labels: good first issue

Open All

1882 open issues indexed

Try harder to resend leave event if it fails Open

A-Federation A-Stuck-Invite T-Enhancement

element-hq/synapse#2139 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
synapse loaded by lots of /federation/v1/event/... requests Open

A-Federation A-Performance O-Uncommon S-Minor T-Defect

element-hq/synapse#2164 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Logout for a Guest User fails Open

A-Guests A-Login O-Uncommon S-Tolerable T-Enhancement

element-hq/synapse#2173 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Index file attachments into the full text search table Open

A-Message-Search A-Search T-Enhancement

element-hq/synapse#2195 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Presence filter in sync ignored Open

A-Presence A-Spec-Compliance A-Sync O-Uncommon S-Minor T-Defect

element-hq/synapse#2298 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Limit size of room storage (files and history) in Matrix server Open

A-Disk-Space

element-hq/synapse#2315 · 7 comments · 7 reactions · 0 assignees · Indexed Sep 15, 2026
Add option to choose postgres during installation Open

A-Packaging

element-hq/synapse#2317 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Failed email notifications are not retried Open

A-Email-Push S-Minor T-Defect

element-hq/synapse#2325 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Most recent room name change should be accessible to new members even if there are history visibility changes Open

A-Invite A-Sync T-Defect

element-hq/synapse#2336 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Notification mail templates use embedded images hosted at matrix.org and vector.im Open

A-Push O-Frequent S-Major T-Defect

element-hq/synapse#2359 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Error: not invited when joining too quickly Open

A-Federated-Join T-Defect

element-hq/synapse#2367 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
complain about unbanning a user that isn't in the room and is not banned Open

A-Moderation A-Spec-Compliance A-User-Experience S-Tolerable T-Defect

element-hq/synapse#2370 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Matrix Synapse server eats lot of RAM memory if log disk is full Open

A-Logging O-Uncommon S-Minor T-Defect

element-hq/synapse#2381 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
bad things happen if you try to invite yourself to a room during creation Open

A-Create-Room A-Invite T-Defect

element-hq/synapse#2386 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Synapse completely hangs every few minutes, when configured with an IPv6 DNS server but no IPv6 network Open

element-hq/synapse#2395 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Consider better error for username availability check invalid input Open

A-Registration A-Validation O-Occasional S-Tolerable T-Defect

element-hq/synapse#2397 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Logically should not be able to leave a user who is not in the room Open

A-Leave A-Membership O-Uncommon S-Major T-Defect

element-hq/synapse#2498 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
backfill slow and expensive Open

A-Federation A-Messages-Endpoint A-Performance T-Task

element-hq/synapse#2504 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Expire local_thumbnails and remote_thumbnail media storage in Synapse Open

A-Media-Repository T-Enhancement

element-hq/synapse#2575 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
whitelist file transfers based on mimetype Open

A-Media-Repository A-Moderation O-Uncommon S-Minor T-Enhancement

element-hq/synapse#2588 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Resource-intensive URL cache expiration bogs down Synapse Open

S-Minor T-Defect

element-hq/synapse#2638 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
It's a real pain that synapse doesn't log stats on the nature of the PDUs/EDUs it receives Open

A-Logging A-Metrics T-Enhancement Z-Help-Wanted

element-hq/synapse#2652 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
thumbnail byte-larger than original Open

A-Media-Repository O-Uncommon S-Tolerable T-Defect

element-hq/synapse#2667 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Shutdown room API should somehow indicate to other homeservers that a content violation has occurred Open

A-Admin-API Security T-Enhancement

element-hq/synapse#2692 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Deleting devices is *incredibly* resource-hungry Open

A-Device-List-Tracking A-Performance T-Defect

element-hq/synapse#2704 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Accepting an invite to a room on another HS returns a 404 Open

A-Application-Service A-Federation A-Invite O-Frequent S-Minor T-Defect

element-hq/synapse#2807 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Email notifications need to be i18nizable Open

A-Email-Push A-Push O-Occasional S-Minor T-Enhancement

element-hq/synapse#2808 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
matrix.org repeatedly trying to backfill HQ from jki.re Open

A-Federation A-Messages-Endpoint A-Performance O-Uncommon S-Major T-Defect

element-hq/synapse#2839 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Don't serve user-uploaded files with correct mime/content type Open

A-Media-Repository Security T-Enhancement

element-hq/synapse#2877 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Media repo should strip out obvious file paths in filename Open

S-Tolerable Security T-Defect

element-hq/synapse#2887 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Wrong text encoding in preview text Open

S-Tolerable T-Defect Z-Help-Wanted

element-hq/synapse#2891 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
disable federation if sqlite is used Open

A-Performance O-Occasional S-Minor T-Enhancement

element-hq/synapse#2917 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
GET /room/.../state 403s via AS even if the room is in the AS's registered namespace Open

A-Application-Service T-Defect

element-hq/synapse#2936 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Consider the user_id alongside the access_token when no-opping /send Open

A-Application-Service A-Testing O-Uncommon S-Tolerable T-Enhancement

element-hq/synapse#2937 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Enable responding with canonical JSON for federation. Open

S-Minor T-Enhancement

element-hq/synapse#2951 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Remove DELETE /directory/list/room/{roomId} Open

A-Room-Directory A-Spec-Compliance P4 T-Task

element-hq/synapse#2953 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Files in /var/lib/matrix-synapse/ are world-readable Open

A-Packaging P5 S-Minor Security T-Defect

element-hq/synapse#2955 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Search for URLs in messages doesn't return any results Open

A-Message-Search A-Search O-Occasional S-Tolerable T-Defect Z-Help-Wanted

element-hq/synapse#3024 · 2 comments · 1 reaction · 0 assignees · Indexed Sep 15, 2026
Nested error JSON Open

element-hq/synapse#3054 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Follow the spec regarding /client/r0/keys/changes Open

A-Spec-Compliance good first issue S-Tolerable T-Defect

element-hq/synapse#3058 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Searching across all rooms is broken. Open

A-Message-Search A-Search O-Occasional S-Minor T-Defect

element-hq/synapse#3077 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Email notifications sent by synapse ignore user's timezone in timestamps Open

A-Email-Push A-Push O-Occasional S-Minor T-Enhancement

element-hq/synapse#3111 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Search is case-sensitive in non-English languages Open

A-I18n A-Message-Search A-Search O-Frequent S-Minor T-Enhancement Z-Help-Wanted

element-hq/synapse#3116 · 0 comments · 5 reactions · 0 assignees · Indexed Sep 15, 2026
massive storm of presence EDUs when joining a large room Open

A-Federated-Join A-Join A-Performance A-Presence O-Frequent S-Major T-Defect

element-hq/synapse#3120 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
ASes should be able to specify a cutoff period for old events Open

A-Application-Service O-Occasional S-Minor T-Enhancement

element-hq/synapse#3237 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Link preview should respect robots.txt Open

A-URL-Preview O-Occasional S-Minor T-Defect

element-hq/synapse#3242 · 2 comments · 2 reactions · 0 assignees · Indexed Sep 15, 2026
We should have some metrics on the HttpTransactionCache Open

A-Metrics T-Enhancement z-minor z-p2

element-hq/synapse#3254 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Support only E2E or public rooms on my homeserver Open

A-Config T-Enhancement

element-hq/synapse#3269 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
disable /ignore for @server:matrix.org Open

O-Uncommon S-Tolerable T-Task

element-hq/synapse#3289 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Exceptions while parsing EDUs mask the problem area of the source Open

O-Occasional S-Tolerable T-Enhancement

element-hq/synapse#3297 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026

element-hq/synapse

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