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# Synapse 1.94.0 (2023-10-10)
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No significant changes since 1.94.0rc1.
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+However, please take note of the security advisory that follows.
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+## Security advisory
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+The following issue is fixed in 1.94.0 (and RC).
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+- [GHSA-5chr-wjw5-3gq4](https://github.com/matrix-org/synapse/security/advisories/GHSA-5chr-wjw5-3gq4) — Moderate Severity
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+ A malicious server ACL event can impact performance temporarily or permanently leading to a persistent denial of service.
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+ Homeservers running on a closed federation (which presumably do not need to use server ACLs) are not affected.
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+See the advisory for more details. If you have any questions, email security@matrix.org.
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# Synapse 1.94.0rc1 (2023-10-03)
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