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Sicherheitslücken in python-tornado

In den letzten 30 Tagen veröffentlichte Sicherheitslücken für python-tornado: 4. Davon im KEV-Katalog: 0.

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Sicherheitslücken: 10

  1. CVE-2026-116578

    Niedrig · CVSS 2.1EPSS 0,46%Keine Korrektur veröffentlicht

    Tornado: Open redirect in RedirectHandler via protocol-relative URLs

    Tornado is a Python web framework and asynchronous networking library. Prior to 6.6, tornado.web.RedirectHandler URL templates can place regex-capture substitutions where crafted request paths change the redirect scheme or network location. Affected placements include substitutions at the start of a path, directly after a fixed host, or at the beginning of the template, including protocol-relative, absolute, backslash, encoded, host-extension, and user-info variants interpreted by browsers as attacker-controlled destinations. Static templates and substitutions after a fixed host followed by a slash are not affected. An attacker can use the re

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  2. CVE-2026-116577

    Mittel · CVSS 5.3EPSS 0,38%Keine Korrektur veröffentlicht

    Tornado: Quadratic CPU usage when parsing HTTP headers with line folding

    Tornado is a Python web framework and asynchronous networking library. Prior to 6.6, Tornado's HTTP header parser accepts obsolete line folding and repeatedly concatenates short continuation lines, causing quadratic CPU consumption on the IOLoop thread. An unauthenticated client can submit a header block containing many obsolete line-folding continuations before application code runs, blocking other connections served by the process. The cost grows with max_header_size, and only availability is affected. This issue is fixed in version 6.6.

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  3. CVE-2026-115927

    Mittel · CVSS 5.3EPSS 0,38%Keine Korrektur veröffentlicht

    Tornado: Event loop blocking and excess memory use from chunked bodies with many small chunks

    Tornado is a Python web framework and asynchronous networking library. Prior to 6.6.0, Tornado decodes HTTP/1.1 chunked transfer encoding by processing body data that has already arrived without yielding to the event loop. A remote unauthenticated peer can send millions of one-byte chunks to monopolize the process event loop and stall every other connection served by that process, while lowering max_body_size only limits the duration of each request. For handlers that do not use @stream_request_body, retaining each chunk as a separate object can consume roughly twenty times the received body size, and SimpleAsyncHTTPClient has the same event-

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  4. CVE-2026-103261

    Mittel · CVSS 6.9EPSS 0,47%Keine Korrektur veröffentlicht

    Tornado before 6.5.9 Denial of Service via Query String

    Tornado before 6.5.9 fails to limit the number of query string fields in HTTPServerRequest.__init__, allowing remote attackers to cause event-loop stalling by sending requests with thousands of query parameters. Attackers can send unauthenticated GET requests with unbounded query-string field counts to degrade response times for all clients sharing the same IOLoop.

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  5. CVE-2026-91991

    Mittel · CVSS 6.3EPSS 0,25%Keine Korrektur veröffentlicht

    Tornado before 6.5.8 Cookie Attribute Injection via Capitalized kwargs

    Tornado before 6.5.8 contains an incomplete fix for cookie attribute injection that allows attackers to inject arbitrary cookie attributes by passing capitalized or legacy keyword arguments to set_cookie. Attackers can embed semicolon-delimited data in capitalized parameters like Domain, Path, or SameSite to bypass validation and modify cookie security attributes.

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  6. CVE-2024-58384

    Mittel · CVSS 6.3EPSS 0,25%Keine Korrektur veröffentlicht

    Tornado before 6.4.1 CRLF Injection via CurlAsyncHTTPClient

    Tornado before 6.4.1 contains a CRLF injection vulnerability in CurlAsyncHTTPClient that fails to reject carriage return and line feed characters in request headers. Attackers can inject CRLF sequences into header values to inject arbitrary headers or construct entirely new HTTP requests.

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  7. CVE-2026-82397

    Hoch · CVSS 7.5EPSS 0,35%Keine Korrektur veröffentlicht

    Tornado: Urlencoded body parsing omits max_num_fields, so one request can stall the event loop

    Tornado is a Python web framework and asynchronous networking library. Prior to 6.5.8, Tornado parses application/x-www-form-urlencoded request bodies with urllib.parse.parse_qs in tornado/escape.py without passing max_num_fields. RequestHandler._execute in tornado/web.py parses the body before handler dispatch through HTTPServerRequest._parse_body and parse_body_arguments in tornado/httputil.py, so an unauthenticated request body containing millions of separator-delimited fields can synchronously stall the single-threaded event loop and delay every connection. The body is bounded only by max_buffer_size, which defaults to 104857600 bytes. Th

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  8. CVE-2026-49855

    Hoch · CVSS 7.5EPSS 0,57%Keine Korrektur veröffentlicht

    tornado AsyncHTTPClient accumulates decompressed chunks without size limit (gzip bomb)

    Tornado is a Python web framework and asynchronous networking library. Prior to 6.5.6, Tornado gzip decompression routines processed limited-size chunks but did not enforce an overall limit on accumulated decompressed chunks, allowing a malicious server accessed by SimpleAsyncHTTPClient or an HTTPServer configured with decompress_request=True to consume effectively unlimited memory. This issue is fixed in version 6.5.6.

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  9. CVE-2026-49854

    Mittel · CVSS 5.3EPSS 0,42%Keine Korrektur veröffentlicht

    Tornado: Out-of-bounds memory access in C extension

    Tornado is a Python web framework and asynchronous networking library. Prior to 6.5.6, the optional native extension tornado.speedups implemented websocket_mask without validating that the mask argument is exactly four bytes, allowing the C function to read up to three bytes beyond the provided buffer when reached through Tornado XSRF token decoding with the native extension active. This issue is fixed in version 6.5.6.

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  10. CVE-2026-49853

    Hoch · CVSS 7.7EPSS 0,45%Keine Korrektur veröffentlicht

    Tornado: Authorization header forwarded across cross-origin redirects in SimpleAsyncHTTPClient

    Tornado is a Python web framework and asynchronous networking library. Prior to 6.5.6, SimpleAsyncHTTPClient shallow-copied redirected requests and removed only the Host header, leaving Authorization, auth_username, auth_password, and auth_mode in place when a redirect changed scheme, host, or port. This issue is fixed in version 6.5.6.

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