SSRF (Server-Side Request Forgery) in streamlit (CVE-2026-33682)
Summary
SSRF in streamlit (CVE-2026-33682). Risk of unauthorized operations or information disclosure. Exploitable via ComponentRequestHandler. Mitigation: upgrade to 1.54.0 or later.
Original description
The description as published by the source.
Streamlit Open Source Security Advisory
1. Impacted Products
Streamlit Open Source versions prior to 1.54.0 running on Windows hosts.
2. Introduction
Snowflake Streamlit Open Source addressed a security vulnerability affecting Windows deployments related to improper handling and validation of filesystem paths within component request handling. The vulnerability was reported through the responsible disclosure program and has been remediated in Streamlit Open Source version 1.54.0. This issue affects only Streamlit deployments running on Windows operating systems.
3. Server-Side Request Forgery (SSRF) and NTLM Credential Exposure
3.1 Description
Streamlit was informed by a security researcher of 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 oth…
Source: OSV.dev (Open Source Vulnerabilities) NVD GitHub Advisory OSV
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-33682 has been found in streamlit.
Attackers can target a specific entry point like ComponentRequestHandler over the network to misuse the product.
Risk of unauthorized operations or information disclosure.
What to do: upgrade streamlit to 1.54.0 or later.
If unsure, ask your IT team or search "streamlit CVE-2026-33682" on the vendor's site.
CVE-2026-33682 (streamlit) — CWE-918
Attack vector: adjacent-network / unauthenticated / no user interaction
Attack surface: ComponentRequestHandler
Patched: 1.54.0 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
SSRF (CWE-918) exists in streamlit. Attackers reach the vulnerable code path via ComponentRequestHandler without authentication.
Check the vendor advisory for the affected versions of streamlit. Attack surface: ComponentRequestHandler.
Severity: ?. Risk of unauthorized operations or information disclosure.
Update to 1.54.0.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'streamlit' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
grep -r 'streamlit' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
streamlitを grep し、稼働しているサービス・バージョンを把握する。 -
2Apply patch patch
Upgrade streamlit to 1.54.0ステージング環境で 1.54.0 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
-
3Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Affected packages
References
- advisory nvd.nist.gov
- package github.com
- web github.com
- web github.com
- web github.com