CVE-2026-33682 Streamlit on Windows has Unauthenticated SSRF Vulnerability (NTLM Credential Exposure)
Unauthenticated SSRF in Streamlit on Windows allows attackers to trigger SMB connections, potentially exposing NTLM credentials for relay attacks.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-33682?
CVE-2026-33682 is a medium-severity server-side request forgery vulnerability in streamlit, published on 26 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Streamlit is a data oriented application development framework for python. Streamlit Open Source versions prior to 1.54.0 running on Windows hosts have an unauthenticated Server-Side Request Forgery (SSRF) vulnerability. The vulnerability arises from improper validation of attacker-supplied filesystem paths. In certain code paths, including within the `ComponentRequestHandler`, filesystem paths are resolved using `os.path.realpath()` or `Path.resolve()` before sufficient validation occurs. On Windows systems, supplying a malicious UNC path (e.g., `\\attacker-controlled-host\share`) can cause the Streamlit server to initiate outbound SMB connections over port 445. When Windows attempts to authenticate to the remote SMB server, NTLMv2 challenge-response credentials of the Windows user running the Streamlit process may be transmitted. This behavior may allow an attacker to perform NTLM relay attacks against other internal services and/or identify internally reachable SMB hosts via timing analysis. The vulnerability has been fixed in Streamlit Open Source version 1.54.0.
Weakness: CWE-918
Which versions are affected by CVE-2026-33682?
3 open source packages ship an affected version, including streamlit and Streamlit. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
streamlit PyPI | All versions | 1.54.0 |
streamlit PyPI | All versions | 1.54.0 |
Streamlit PyPI | All versions | 1.54.0 |
Products include Snowflake Streamlit.
How do I fix CVE-2026-33682?
Upgrade streamlit to 1.54.0 or later.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-33682 being exploited?
There is no known exploitation of CVE-2026-33682 in the wild and no public exploit code.
Other vulnerabilities in streamlit
Sources
Also known as GHSA-7p48-42j8-8846, PYSEC-2026-2285.