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-rw-r--r--Lib/ssl.py3
-rw-r--r--Misc/NEWS3
2 files changed, 6 insertions, 0 deletions
diff --git a/Lib/ssl.py b/Lib/ssl.py
index b6e6f1695d..2b81b790d8 100644
--- a/Lib/ssl.py
+++ b/Lib/ssl.py
@@ -458,6 +458,9 @@ def _create_unverified_context(protocol=PROTOCOL_SSLv23, *, cert_reqs=None,
context = SSLContext(protocol)
# SSLv2 considered harmful.
context.options |= OP_NO_SSLv2
+ # SSLv3 has problematic security and is only required for really old
+ # clients such as IE6 on Windows XP
+ context.options |= OP_NO_SSLv3
if cert_reqs is not None:
context.verify_mode = cert_reqs
diff --git a/Misc/NEWS b/Misc/NEWS
index 275e8590de..2d131bd9cc 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -36,6 +36,9 @@ Core and Builtins
Library
-------
+- Issue #22638: SSLv3 is now disabled throughout the standard library.
+ It can still be enabled by instantiating a SSLContext manually.
+
- Issue #22370: Windows detection in pathlib is now more robust.
- Issue #22841: Reject coroutines in asyncio add_signal_handler().