The Fix
pip install stripe==2.29.1
Based on closed stripe/stripe-python issue #577 · 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%.
@@ -18,13 +18,12 @@ def construct_event(
if hasattr(payload, "decode"):
payload = payload.decode("utf-8")
- if api_key is None:
- api_key = stripe.api_key
- data = json.loads(payload)
Option A — Upgrade to fixed release\npip install stripe==2.29.1\nWhen NOT to use: Do not apply this fix if the webhook signature verification is already implemented correctly.\n\n
Why This Fix Works in Production
- Trigger: Check webhook signature before constructing `Event` from the payload
- Mechanism: The webhook signature was verified after processing the event payload, potentially exposing security risks
- Why the fix works: Verifies the signature from the `Stripe-Signature` header before deserializing the JSON payload into an `Event` instance, addressing security concerns raised in issue #577. (first fixed release: 2.29.1).
- 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 webhook signature was verified after processing the event payload, potentially exposing security risks
- Production symptom (often without a traceback): Check webhook signature before constructing `Event` from the payload
Proof / Evidence
- GitHub issue: #577
- Fix PR: https://github.com/stripe/stripe-python/pull/578
- First fixed release: 2.29.1
- Reproduced locally: No (not executed)
- Last verified: 2026-02-08
- Confidence: 0.85
- Did this fix it?: Yes (upstream fix exists)
- Own content ratio: 0.75
Discussion
High-signal excerpts from the issue thread (symptoms, repros, edge-cases).
“Hi @rfk! You are entirely correct, we've made a similar change to most of our client libraries for other languages, but it looks like we…”
Failure Signature (Search String)
- Check webhook signature before constructing `Event` from the payload
- https://github.com/stripe/stripe-python/blob/15d03381b3a3019517e7a31e1607bb5af0bda5a6/stripe/webhook.py#L23-L26
Copy-friendly signature
Failure Signature
-----------------
Check webhook signature before constructing `Event` from the payload
https://github.com/stripe/stripe-python/blob/15d03381b3a3019517e7a31e1607bb5af0bda5a6/stripe/webhook.py#L23-L26
Error Message
Signature-only (no traceback captured)
Error Message
-------------
Check webhook signature before constructing `Event` from the payload
https://github.com/stripe/stripe-python/blob/15d03381b3a3019517e7a31e1607bb5af0bda5a6/stripe/webhook.py#L23-L26
What Broke
Webhook events could be processed without proper signature verification, leading to security vulnerabilities.
Why It Broke
The webhook signature was verified after processing the event payload, potentially exposing security risks
Fix Options (Details)
Option A — Upgrade to fixed release Safe default (recommended)
pip install stripe==2.29.1
Use when you can deploy the upstream fix. It is usually lower-risk than long-lived workarounds.
Fix reference: https://github.com/stripe/stripe-python/pull/578
First fixed release: 2.29.1
Last verified: 2026-02-08. Validate in your environment.
When NOT to Use This Fix
- Do not apply this fix if the webhook signature verification is already implemented correctly.
Did This Fix Work in Your Case?
Quick signal helps us prioritize which fixes to verify and improve.
Prevention
- Capture the exact failing error string in logs and tests so you can reproduce via a minimal script.
- Pin production dependencies and upgrade only with a reproducible test that hits the failing path.
Version Compatibility Table
| Version | Status |
|---|---|
| 2.29.1 | Fixed |
Related Issues
No related fixes found.
Sources
We don’t republish the full GitHub discussion text. Use the links above for context.