diff options
| -rw-r--r-- | changelog.d/12101.misc | 1 | ||||
| -rw-r--r-- | synapse/handlers/message.py | 3 |
2 files changed, 4 insertions, 0 deletions
diff --git a/changelog.d/12101.misc b/changelog.d/12101.misc new file mode 100644 index 0000000000..d165f73d13 --- /dev/null +++ b/changelog.d/12101.misc @@ -0,0 +1 @@ +Limit the size of `aggregation_key` on annotations. diff --git a/synapse/handlers/message.py b/synapse/handlers/message.py index 61cb133ef2..0799ec9a84 100644 --- a/synapse/handlers/message.py +++ b/synapse/handlers/message.py @@ -1069,6 +1069,9 @@ class EventCreationHandler: if relation_type == RelationTypes.ANNOTATION: aggregation_key = relation["key"] + if len(aggregation_key) > 500: + raise SynapseError(400, "Aggregation key is too long") + already_exists = await self.store.has_user_annotated_event( relates_to, event.type, aggregation_key, event.sender ) |