PYSEC-2026-577 rok Python ProxyShare can be used as an SSRF proxy through absolute URL paths

Summary Alice exposes a Python SDK ProxyShare with a fixed target URL. Bob sends a request to the share with an absolute URL in the path. The Flask handler passes that path to urllib.parse.urljoin, which replaces Alice's configured target host with Bob's host and returns the server-side response ...

PT-2026-53429

Technical Description The OpenAPIProvider in FastMCP exposes internal APIs to MCP clients by parsing OpenAPI specifications. The RequestDirector class is responsible for constructing HTTP requests to the backend service. A critical vulnerability exists in the build url method. When an OpenAPI...

CVE-2026-44889

WebOb provides objects for HTTP requests and responses. Prior to 1.8.10, the normalization of the HTTP Location header during a redirect is vulnerable to an open redirect: WebOb joins the redirect target to the request URI using Python's urljoin, and since Python 3.10 the underlying urlsplit stri...

CVE-2026-44889 WebOb: Location header normalization during redirect leads to open redirect

WebOb provides objects for HTTP requests and responses. Prior to 1.8.10, the normalization of the HTTP Location header during a redirect is vulnerable to an open redirect: WebOb joins the redirect target to the request URI using Python's urljoin, and since Python 3.10 the underlying urlsplit stri...

CVE-2026-44889 WebOb: Location header normalization during redirect leads to open redirect

WebOb provides objects for HTTP requests and responses. Prior to 1.8.10, the normalization of the HTTP Location header during a redirect is vulnerable to an open redirect: WebOb joins the redirect target to the request URI using Python's urljoin, and since Python 3.10 the underlying urlsplit stri...

CVE-2026-44889

WebOb provides objects for HTTP requests and responses. Prior to 1.8.10, the normalization of the HTTP Location header during a redirect is vulnerable to an open redirect: WebOb joins the redirect target to the request URI using Python's urljoin, and since Python 3.10 the underlying urlsplit stri...

GHSA-FH3H-VG37-CC95 WebOb: Location header normalization during redirect leads to open redirect - again

Impact When WebOb normalizes the HTTP Location header to include the request hostname, it does so by parsing the URL that the user is to be redirected to with Python's urllib.parse, and joining it to the base URL. urlsplit called internally by urljoin however treats a // at the start of a string ...

WebOb: Location header normalization during redirect leads to open redirect - again

Impact When WebOb normalizes the HTTP Location header to include the request hostname, it does so by parsing the URL that the user is to be redirected to with Python's urllib.parse, and joining it to the base URL. urlsplit called internally by urljoin however treats a // at the start of a string ...

FastMCP OpenAPI Provider has an SSRF & Path Traversal Vulnerability

Technical Description The OpenAPIProvider in FastMCP exposes internal APIs to MCP clients by parsing OpenAPI specifications. The RequestDirector class is responsible for constructing HTTP requests to the backend service. A critical vulnerability exists in the buildurl method. When an OpenAPI...

GHSA-VV7Q-7JX5-F767 FastMCP OpenAPI Provider has an SSRF & Path Traversal Vulnerability

Technical Description The OpenAPIProvider in FastMCP exposes internal APIs to MCP clients by parsing OpenAPI specifications. The RequestDirector class is responsible for constructing HTTP requests to the backend service. A critical vulnerability exists in the buildurl method. When an OpenAPI...

webob: WebOb's location header normalization during redirect leads to open redirect

A vulnerability was found in the WebOb package. WebOb normalizes the HTTP Location header using urlparse and urljoin. If the URL starts with //, urlparse treats the following part as the hostname, and replaces the original request's hostname. This issue, combined with user interaction, may become...

webob: WebOb's location header normalization during redirect leads to open redirect

A vulnerability was found in the WebOb package. WebOb normalizes the HTTP Location header using urlparse and urljoin. If the URL starts with //, urlparse treats the following part as the hostname, and replaces the original request's hostname. This issue, combined with user interaction, may become...

CBL Mariner 2.0 Security Update: python-webob (CVE-2024-42353)

The version of python-webob installed on the remote CBL Mariner 2.0 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the CVE-2024-42353 advisory. - WebOb provides objects for HTTP requests and responses. When WebOb normalizes the HTTP Location header...

The vulnerabilities of the functions urlparse() and urljoin() in the WebOb library, which are used for analyzing HTTP requests and generating HTTP responses, allow a hacker to redirect users to any given URL address.

The vulnerability of the urlparse and urljoin functions in the WebOb library, which are used for analyzing HTTP requests and generating HTTP responses, relates to the redirection of URLs to unreliable websites when processing the HTTP Location header. Exploiting this vulnerability allows a remote...

webob: WebOb's location header normalization during redirect leads to open redirect

A vulnerability was found in the WebOb package. WebOb normalizes the HTTP Location header using urlparse and urljoin. If the URL starts with //, urlparse treats the following part as the hostname, and replaces the original request's hostname. This issue, combined with user interaction, may become...

webob: WebOb's location header normalization during redirect leads to open redirect

A vulnerability was found in the WebOb package. WebOb normalizes the HTTP Location header using urlparse and urljoin. If the URL starts with //, urlparse treats the following part as the hostname, and replaces the original request's hostname. This issue, combined with user interaction, may become...

Updated python3-webob package fix security vulnerability

When WebOb normalizes the HTTP Location header to include the request hostname, it does so by parsing the URL that the user is to be redirected to with Python's urlparse, and joining it to the base URL. urlparse however treats a // at the start of a string as a URI without a scheme, and then trea...

SUSE CVE-2024-42353

WebOb provides objects for HTTP requests and responses. When WebOb normalizes the HTTP Location header to include the request hostname, it does so by parsing the URL that the user is to be redirected to with Python's urlparse, and joining it to the base URL. urlparse however treats a // at the...

CVE-2024-42353

A vulnerability was found in the WebOb package. WebOb normalizes the HTTP Location header using urlparse and urljoin. If the URL starts with //, urlparse treats the following part as the hostname, and replaces the original request's hostname. This issue, combined with user interaction, may become...

CVE-2024-42353

WebOb provides objects for HTTP requests and responses. When WebOb normalizes the HTTP Location header to include the request hostname, it does so by parsing the URL that the user is to be redirected to with Python's urlparse, and joining it to the base URL. urlparse however treats a // at the...