redis-py `ssl_password` is not supported at

The Fix

pip install redis==7.1.1

Based on closed redis/redis-py issue #3347 · PR/commit linked

Production note: Most teams hit this during upgrades or environment changes. Roll out with a canary and smoke critical endpoints (health, OpenAPI/docs) before 100%.

Open PR/Commit

@@ -247,6 +247,7 @@ def __init__(
         ssl_min_version: Optional[TLSVersion] = None,
         ssl_ciphers: Optional[str] = None,
+        ssl_password: Optional[str] = None,
         max_connections: Optional[int] = None,
         single_connection_client: bool = False,

fix.md

Option A — Upgrade to fixed release\npip install redis==7.1.1\nWhen NOT to use: This fix should not be used if the Redis client does not require SSL or mTLS.\n\n

Why This Fix Works in Production

Trigger: `ssl_password` is not supported at `redis.asyncio.Redis` constructor
Mechanism: The async Redis client did not support the ssl_password parameter for encrypted private keys
Why the fix works: Added support for the `ssl_password` parameter in the async Redis client to enable using encrypted private keys. (first fixed release: 7.1.1).

Production impact:

If left unfixed, the same config can fail only in production (env differences), causing startup failures or partial feature outages.

Why This Breaks in Prod

The async Redis client did not support the ssl_password parameter for encrypted private keys
Production symptom (often without a traceback): `ssl_password` is not supported at `redis.asyncio.Redis` constructor

Proof / Evidence

GitHub issue: #3347
Fix PR: https://github.com/redis/redis-py/pull/3878
First fixed release: 7.1.1
Reproduced locally: No (not executed)
Last verified: 2026-02-09
Confidence: 0.70
Did this fix it?: Yes (upstream fix exists)
Own content ratio: 0.78

Discussion

High-signal excerpts from the issue thread (symptoms, repros, edge-cases).

Jump to Sources Open on GitHub

“Looking at previous issues I'd guess this could be fixed by just passing the parameter along? See #1757 and #2060. Or is there something that…”

@VMelnalksnis · 2025-03-15 · source

Failure Signature (Search String)

`ssl_password` is not supported at `redis.asyncio.Redis` constructor

Copy-friendly signature

signature.txt

Failure Signature
-----------------
`ssl_password` is not supported at `redis.asyncio.Redis` constructor

Error Message

Signature-only (no traceback captured)

error.txt

Error Message
-------------
`ssl_password` is not supported at `redis.asyncio.Redis` constructor

What Broke

Users cannot establish mTLS connections with passphrase-protected keys.

Why It Broke

The async Redis client did not support the ssl_password parameter for encrypted private keys

Fix Options (Details)

Option A — Upgrade to fixed release Safe default (recommended)

pip install redis==7.1.1

When NOT to use: This fix should not be used if the Redis client does not require SSL or mTLS.

Use when you can deploy the upstream fix. It is usually lower-risk than long-lived workarounds.

Fix reference: https://github.com/redis/redis-py/pull/3878

First fixed release: 7.1.1

Last verified: 2026-02-09. Validate in your environment.

When NOT to Use This Fix

This fix should not be used if the Redis client does not require SSL or mTLS.

Did This Fix Work in Your Case?

Quick signal helps us prioritize which fixes to verify and improve.

Prevention

Add a TLS smoke test that performs a real handshake in CI (include CA bundle validation and hostname checks).
Alert on handshake failures by error string and endpoint to catch cert/CA changes quickly.
Add a stress test that runs high-concurrency workloads and fails on thread dumps / blocked locks.
Enable watchdog dumps in prod (faulthandler, thread dump endpoint) to capture deadlocks quickly.

Version Compatibility Table

Version	Status
7.1.1	Fixed

Related Issues

No related fixes found.

Cluster: redis-py:configuration-error redis-py hub redis-py best practices All hubs All clusters

Related clusters: Retry storm Data consistency Race condition

Sources

We don’t republish the full GitHub discussion text. Use the links above for context.

redis-py `ssl_password` is not supported at `redis.asyncio.Redis` constructor (Fix)