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 issues indexed so far

Provide ways to analyze incoming federation delay issues and other problems with incoming message delays [from old repo] Open

A-Federation A-Metrics T-Enhancement

element-hq/synapse#3 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Don't accept threaded receipts for reactions to/replies to/edits of a thread root Open

A-Threads

element-hq/synapse#5 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Guest accounts should expire Open

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

element-hq/synapse#669 · 0 comments · 1 reaction · 0 assignees · Indexed Sep 15, 2026
delete old data to clean up database Open

A-Database A-Disk-Space z-feature

element-hq/synapse#890 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Android client needs a dedicated request to retrieve the notified message when GCM is disabled Open

A-Push

element-hq/synapse#891 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Japanese, Chinese and other non-ASCII searching not quite working Open

A-I18n A-Message-Search A-Search O-Frequent S-Minor T-Defect

element-hq/synapse#901 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Add database structure visualisation to documentation Open

A-Docs P5 T-Enhancement

element-hq/synapse#934 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
fail2ban regexps for synapse Open

A-Abuse T-Enhancement

element-hq/synapse#1154 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Client-Side Applications, Restricted Access and Application-Specific Tokens Open

T-Enhancement

element-hq/synapse#1194 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Homeservers should announce MOTD, canonical name, human name, version, etc... (SYN-1) Open

A-User-Experience O-Frequent S-Tolerable T-Enhancement

element-hq/synapse#1199 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
If the HS doesn't think there are any users in a room, perhaps it should have the (default) option of automatically deleting any aliases that refer to it (SYN-7) Open

A-Room-Directory O-Uncommon S-Minor T-Enhancement

element-hq/synapse#1201 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Rooms should have the option of kicking out lurkers (SYN-8) Open

A-Membership O-Occasional S-Tolerable T-Enhancement

element-hq/synapse#1202 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Source avatars from gravatars if we have an email 3PID (SYN-34) Open

O-Frequent S-Minor T-Enhancement

element-hq/synapse#1210 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Client IP-based channel bans as per IRC. (SYN-62) Open

A-Moderation O-Uncommon S-Minor T-Enhancement z-feature

element-hq/synapse#1216 · 0 comments · 1 reaction · 0 assignees · Indexed Sep 15, 2026
If I leave a 1:1 chat, i can't rejoin it. (SYN-79) Open

A-DMs A-Invite O-Uncommon S-Tolerable T-Defect

element-hq/synapse#1221 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Track which IP addresses are sending requests with bad signatures. (SYN-94) Open

A-Abuse O-Uncommon S-Tolerable T-Enhancement

element-hq/synapse#1226 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
We shouldn't let people DoS us via /sync (SYN-660) Open

A-Sync T-Defect

element-hq/synapse#1239 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Report image transparency (SYN-170) Open

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

element-hq/synapse#1248 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Updating avatar URL and displayname at the same time results in weird m.room.member events (SYN-183) Open

A-Profiles O-Uncommon S-Tolerable T-Defect

element-hq/synapse#1251 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
We should check "depth" increases. (SYN-196) Open

A-Spec-Compliance O-Uncommon S-Tolerable T-Defect

element-hq/synapse#1254 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Add support for dropping privileges when started as root (SYN-198) Open

P4 T-Enhancement

element-hq/synapse#1255 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Improved mechanisms for discovering rooms (SYN-210) Open

A-Room-Directory T-Enhancement z-feature

element-hq/synapse#1260 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
When we redact events, any mxc content they refer to should be redacted too (SYN-216) Open

A-Media-Repository A-Redactions T-Enhancement z-feature z-privacy-sprint

element-hq/synapse#1263 · 2 comments · 10 reactions · 0 assignees · Indexed Sep 15, 2026
Hold notification pokes for users that are online (SYN-306) Open

A-Push O-Frequent S-Minor T-Enhancement z-feature

element-hq/synapse#1293 · 0 comments · 1 reaction · 0 assignees · Indexed Sep 15, 2026
We should let the user explicitly authorise pushers, to avoid malicious apps installing a pusher that intercepts all their traffic. (SYN-309) Open

A-Push S-Tolerable T-Enhancement

element-hq/synapse#1295 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Changing displayname is catastrophically slow. (SYN-311) Open

A-Performance O-Frequent S-Tolerable T-Defect

element-hq/synapse#1297 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Add thumbnailing support to media repository for SVGs (SYN-344) Open

A-Media-Repository O-Occasional S-Minor T-Enhancement

element-hq/synapse#1309 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Be stricter when parsing MXC URIs (SYN-393) Open

A-Spec-Compliance O-Occasional S-Tolerable T-Defect

element-hq/synapse#1323 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Content repo should name content by hashes to factor out duplicates (SYN-401) Open

A-Media-Repository T-Enhancement z-feature

element-hq/synapse#1328 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Allow passing in listen-mode sockets (SYN-402) Open

P5 T-Enhancement

element-hq/synapse#1329 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
audit M_UNKNOWN errors and make them meaningful - eg 'you are not invited' (SYN-422) Open

good first issue O-Uncommon S-Tolerable T-Enhancement

element-hq/synapse#1338 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
investigate ed25519 batch verification for speeding up DAG key validation (SYN-436) Open

A-Performance O-Uncommon S-Tolerable T-Enhancement

element-hq/synapse#1349 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Reloading appservices (SYN-444) Open

A-Application-Service T-Enhancement

element-hq/synapse#1354 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
we should support horizontally scaling ASes by roundrobining transactions where viable (SYN-445) Open

A-Application-Service A-Performance T-Enhancement

element-hq/synapse#1355 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
We need a howto on how to package synapse for distributors (SYN-479) Open

A-Docs A-Packaging O-Uncommon S-Tolerable T-Task

element-hq/synapse#1373 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
`m.ignore_user_list` plays badly with pagination (SYN-702) Open

A-ignored-users A-Messages-Endpoint S-Minor T-Defect

element-hq/synapse#1378 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Why don't we validate the JSON that clients submit for core event types like m.room.join_rules (SYN-720) Open

A-Validation T-Enhancement

element-hq/synapse#1391 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
e2e upload API allows you to POST keys claiming to belong to other user's UIDs (SYN-496) Open

A-E2EE S-Major T-Enhancement

element-hq/synapse#1396 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
HS apparently doesn't block when clients provision an AS-backed virtual room (SYN-497) Open

A-Application-Service A-Create-Room O-Uncommon S-Minor T-Defect

element-hq/synapse#1397 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Federation 'send_join' is insufficiently pedantic (SYN-507) Open

A-Federated-Join A-Spec-Compliance A-Validation O-Uncommon S-Minor T-Defect Z-Cleanup

element-hq/synapse#1407 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Setting receipts from client doesn't mind syntactically-invalid event IDs (SYN-512) Open

A-Read-Receipts A-Validation O-Uncommon S-Tolerable T-Defect

element-hq/synapse#1412 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Joining and leaving a room in the same batch should result in a full state sync (SYN-514) Open

A-Join A-Leave A-Sync O-Uncommon S-Tolerable T-Defect

element-hq/synapse#1413 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Typing notifications latch on if server restarts while someone is typing (SYN-525) Open

A-Typing-Notifications O-Uncommon S-Tolerable T-Defect

element-hq/synapse#1422 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Ideally, redacted messages should send an anti-push to clear them from notification lists (SYN-527) Open

A-Push O-Occasional S-Tolerable T-Enhancement

element-hq/synapse#1425 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Postgres full text search fails to index terms including full stops (SYN-528) Open

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

element-hq/synapse#1426 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
cross-federation invites may cause duplicate invites; one works and other 403s (SYN-538) Open

A-Federation A-Invite T-Defect

element-hq/synapse#1437 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Querying "room state" on a room alias gives unhelpful error messages (SYN-545) Open

O-Uncommon S-Tolerable T-Defect

element-hq/synapse#1442 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Setting profile + joining a room can race (SYN-787) Open

A-Join A-Profiles T-Defect Z-Read-After-Write

element-hq/synapse#1444 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
We need a way of redacting offensive avatars and displaynames (SYN-566) Open

A-Moderation A-Redactions O-Occasional S-Minor T-Enhancement

element-hq/synapse#1458 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Thumbnailing with 'crop' leads to bad client layout unless the client requests a supported resolution/aspect ratio (SYN-581) Open

A-Media-Repository T-Enhancement

element-hq/synapse#1465 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026

element-hq/synapse

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