diff --git a/changelog.d/12723.misc b/changelog.d/12723.misc
new file mode 100644
index 000000000000..4f5bffeda639
--- /dev/null
+++ b/changelog.d/12723.misc
@@ -0,0 +1 @@
+Downgrade some OIDC errors to warnings in the logs, to reduce the noise of Sentry reports.
diff --git a/synapse/handlers/oidc.py b/synapse/handlers/oidc.py
index f6ffb7d18d91..9de61d554f41 100644
--- a/synapse/handlers/oidc.py
+++ b/synapse/handlers/oidc.py
@@ -224,7 +224,7 @@ async def handle_oidc_callback(self, request: SynapseRequest) -> None:
             self._sso_handler.render_error(request, "invalid_session", str(e))
             return
         except MacaroonInvalidSignatureException as e:
-            logger.exception("Could not verify session for OIDC callback")
+            logger.warning("Could not verify session for OIDC callback: %s", e)
             self._sso_handler.render_error(request, "mismatching_session", str(e))
             return
 
@@ -827,7 +827,7 @@ async def handle_oidc_callback(
             logger.debug("Exchanging OAuth2 code for a token")
             token = await self._exchange_code(code)
         except OidcError as e:
-            logger.exception("Could not exchange OAuth2 code")
+            logger.warning("Could not exchange OAuth2 code: %s", e)
             self._sso_handler.render_error(request, e.error, e.error_description)
             return