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59 vulnerabilities found for tornado by tornadoweb
CVE-2026-126347 (GCVE-0-2026-126347)
Vulnerability from nvd – Published: 2026-11-12 21:52 – Updated: 2026-11-13 19:45
VLAI
EPSS
VEX
Title
Tornado: Open redirect via triple-slash redirect paths
Summary
Tornado is a Python web framework and asynchronous networking library. In versions through 6.6.0, applications using tornado.web.RedirectHandler with URL templates that allow attacker-controlled substitutions to influence the destination can be vulnerable to an open redirect using three or more leading slashes. Differences between Python’s URL parsing and browser URL interpretation allow a crafted destination to redirect a user to an attacker-controlled host. The remediation for CVE-2026-116578 in version 6.6.0 did not fully address this case. This issue is fixed in version 6.6.1.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-13 19:44 UTC
CWE
- CWE-601 - URL Redirection to Untrusted Site
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/tornadoweb/tornado/security/ad… | x_refsource_CONFIRM |
| https://github.com/tornadoweb/tornado/commit/c503… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| tornadoweb | tornado |
Affected:
< 6.6.1
|
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CVE-2026-123535 (GCVE-0-2026-123535)
Vulnerability from nvd – Published: 2026-11-08 01:37 – Updated: 2026-11-12 14:06
VLAI
EPSS
VEX
Title
Tornado before 6.6 Cookie Attribute Injection via set_cookie max_age
Summary
Tornado before 6.6 does not validate the max_age argument of RequestHandler.set_cookie (also called by set_signed_cookie, set_secure_cookie, and clear_cookie), allowing injection of additional Set-Cookie attributes. When an application passes attacker-influenced input as max_age, an attacker can embed attributes such as Domain, Path, or Secure to widen the cookie's scope to parent paths or other subdomains.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-12 14:06 UTC
CWE
- CWE-74 - Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/tornadoweb/tornado/security/ad… | vendor-advisory |
| https://www.vulncheck.com/advisories/tornado-befo… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| tornadoweb | tornado |
Affected:
0 , < 6.6
(custom)
Unaffected: 6.6 (custom) cpe:2.3:a:tornadoweb:tornado:*:*:*:*:*:*:*:* |
Date Public
2026-10-22 00:00
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CVE-2026-123534 (GCVE-0-2026-123534)
Vulnerability from nvd – Published: 2026-11-08 01:37 – Updated: 2026-11-09 14:05
VLAI
EPSS
VEX
Title
Tornado before 6.6 Path Traversal via static_url() Version Hashing
Summary
Tornado before 6.6 contains a path traversal vulnerability in RequestHandler.static_url() and get_version() that allows attackers to hash files outside static_path using ../ sequences. Attackers controlling input passed to static_url() can obtain SHA-512 hashes of readable files to confirm their existence, or reference /dev/zero to block the event loop indefinitely.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-09 14:05 UTC
CWE
- CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/tornadoweb/tornado/security/ad… | vendor-advisory |
| https://www.vulncheck.com/advisories/tornado-befo… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| tornadoweb | tornado |
Affected:
0 , < 6.6
(custom)
Unaffected: 6.6 (custom) cpe:2.3:a:tornadoweb:tornado:*:*:*:*:*:*:*:* |
Date Public
2026-10-22 00:00
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CVE-2026-116578 (GCVE-0-2026-116578)
Vulnerability from nvd – Published: 2026-10-26 20:22 – Updated: 2026-10-30 14:28
VLAI
EPSS
VEX
Title
Tornado: Open redirect in RedirectHandler via protocol-relative URLs
Summary
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 resulting open redirect on the application's domain for phishing. This issue is fixed in version 6.6.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-30 14:28 UTC
CWE
- CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://github.com/tornadoweb/tornado/security/ad… | x_refsource_CONFIRM |
| https://github.com/tornadoweb/tornado/pull/3786 | x_refsource_MISC |
| https://github.com/tornadoweb/tornado/commit/940e… | x_refsource_MISC |
| https://github.com/tornadoweb/tornado/commit/cc75… | x_refsource_MISC |
| https://github.com/tornadoweb/tornado/commit/ccb6… | x_refsource_MISC |
| https://github.com/tornadoweb/tornado/releases/ta… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| tornadoweb | tornado |
Affected:
< 6.6
|
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CVE-2026-116577 (GCVE-0-2026-116577)
Vulnerability from nvd – Published: 2026-10-26 20:20 – Updated: 2026-10-31 01:48
VLAI
EPSS
VEX
Title
Tornado: Quadratic CPU usage when parsing HTTP headers with line folding
Summary
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.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-31 01:48 UTC
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/tornadoweb/tornado/security/ad… | x_refsource_CONFIRM |
| https://github.com/tornadoweb/tornado/pull/3765 | x_refsource_MISC |
| https://github.com/tornadoweb/tornado/commit/1b7a… | x_refsource_MISC |
| https://github.com/tornadoweb/tornado/releases/ta… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| tornadoweb | tornado |
Affected:
< 6.6
|
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CVE-2026-115927 (GCVE-0-2026-115927)
Vulnerability from nvd – Published: 2026-10-26 19:37 – Updated: 2026-10-27 14:18
VLAI
EPSS
VEX
Title
Tornado: Event loop blocking and excess memory use from chunked bodies with many small chunks
Summary
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-loop behavior when reading a response from a malicious server. This issue is fixed in version 6.6.0.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-27 13:45 UTC
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/tornadoweb/tornado/security/ad… | x_refsource_CONFIRM |
| https://github.com/tornadoweb/tornado/pull/3773 | x_refsource_MISC |
| https://github.com/tornadoweb/tornado/commit/ceab… | x_refsource_MISC |
| https://github.com/tornadoweb/tornado/releases/ta… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| tornadoweb | tornado |
Affected:
< 6.6.0
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CVE-2026-103263 (GCVE-0-2026-103263)
Vulnerability from nvd – Published: 2026-10-01 10:42 – Updated: 2026-10-01 19:29
VLAI
EPSS
VEX
Title
Tornado before 6.5.9 StaticFileHandler Path Traversal via Symlink
Summary
Tornado before 6.5.9 contains a path traversal vulnerability in StaticFileHandler that follows symbolic links inside the static root without confirming the resolved target stays within it. When a symlink pointing outside the static directory exists inside it, unauthenticated attackers can request it to read files such as configuration files, private keys, and application secrets accessible to the process user.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-01 19:29 UTC
CWE
- CWE-59 - Improper Link Resolution Before File Access ('Link Following')
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/tornadoweb/tornado/security/ad… | vendor-advisory |
| https://github.com/tornadoweb/tornado/commit/437a… | patch |
| https://www.vulncheck.com/advisories/tornado-befo… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| tornadoweb | tornado |
Affected:
0 , < 6.5.9
(semver)
Unaffected: 6.5.9 (semver) cpe:2.3:a:tornadoweb:tornado:*:*:*:*:*:*:*:* |
Date Public
2026-09-14 00:00
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CVE-2026-103262 (GCVE-0-2026-103262)
Vulnerability from nvd – Published: 2026-10-01 10:42 – Updated: 2026-10-06 00:08
VLAI
EPSS
VEX
Title
Tornado before 6.5.9 Denial of Service via CurlAsyncHTTPClient
Summary
Tornado versions before 6.5.9 contain an unbounded memory accumulation vulnerability in CurlAsyncHTTPClient that allows remote attackers to cause denial of service by sending a compressed response. Attackers can send a gzip-encoded decompression bomb that accumulates in memory without size limits, causing the application process to be killed by out-of-memory conditions.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-06 00:08 UTC
CWE
- CWE-409 - Improper Handling of Highly Compressed Data (Data Amplification)
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/tornadoweb/tornado/security/ad… | vendor-advisory |
| https://github.com/tornadoweb/tornado/commit/e412… | patch |
| https://www.vulncheck.com/advisories/tornado-befo… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| tornadoweb | tornado |
Affected:
0 , < 6.5.9
(semver)
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CVE-2026-103261 (GCVE-0-2026-103261)
Vulnerability from nvd – Published: 2026-10-01 10:42 – Updated: 2026-10-01 14:44
VLAI
EPSS
VEX
Title
Tornado before 6.5.9 Denial of Service via Query String
Summary
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.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-01 14:44 UTC
CWE
- CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/tornadoweb/tornado/security/ad… | vendor-advisory |
| https://github.com/tornadoweb/tornado/commit/0394… | patch |
| https://www.vulncheck.com/advisories/tornado-befo… | third-party-advisory |
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1 product
| Vendor | Product | Version | |
|---|---|---|---|
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Affected:
0 , < 6.5.9
(semver)
Unaffected: 6.5.9 (semver) cpe:2.3:a:tornadoweb:tornado:*:*:*:*:*:*:*:* |
Date Public
2026-09-14 00:00
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CVE-2026-91992 (GCVE-0-2026-91992)
Vulnerability from nvd – Published: 2026-09-15 15:18 – Updated: 2026-09-17 15:16
VLAI
EPSS
VEX
Title
Tornado before 6.5.7 Credential Leak via Handle Reuse
Summary
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Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-17 15:16 UTC
CWE
- CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/tornadoweb/tornado/security/ad… | vendor-advisory |
| https://www.vulncheck.com/advisories/tornado-befo… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| tornadoweb | tornado |
Affected:
0 , < 6.5.7
(semver)
Unaffected: 6.5.7 (semver) cpe:2.3:a:tornadoweb:tornado:*:*:*:*:*:*:*:* |
Date Public
2026-06-08 00:00
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CVE-2026-91991 (GCVE-0-2026-91991)
Vulnerability from nvd – Published: 2026-09-15 15:18 – Updated: 2026-10-08 15:26
VLAI
EPSS
VEX
Title
Tornado before 6.5.8 Cookie Attribute Injection via Capitalized kwargs
Summary
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.
Severity
5.4 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-21 19:14 UTC
CWE
- CWE-113 - Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/tornadoweb/tornado/security/ad… | vendor-advisory |
| https://www.vulncheck.com/advisories/tornado-befo… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| tornadoweb | tornado |
Affected:
6.5.5 , < 6.5.8
(semver)
Unaffected: 6.5.8 (semver) cpe:2.3:a:tornadoweb:tornado:*:*:*:*:*:*:*:* |
Date Public
2026-08-07 00:00
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CVE-2026-91990 (GCVE-0-2026-91990)
Vulnerability from nvd – Published: 2026-09-15 15:18 – Updated: 2026-09-15 16:05
VLAI
EPSS
VEX
Title
Tornado before 6.5.8 Memory Amplification DoS via multipart
Summary
Tornado before 6.5.8 contains a memory amplification vulnerability in parse_multipart_form_data that splits multipart data before validating the max_parts limit. Attackers can send crafted multipart requests with many parts to create large transient lists, exhausting server memory and causing denial of service.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-15 16:04 UTC
CWE
- CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/tornadoweb/tornado/security/ad… | vendor-advisory |
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Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| tornadoweb | tornado |
Affected:
0 , < 6.5.8
(semver)
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Date Public
2026-08-07 00:00
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CVE-2024-58384 (GCVE-0-2024-58384)
Vulnerability from nvd – Published: 2026-09-15 15:17 – Updated: 2026-09-17 19:29
VLAI
EPSS
VEX
Title
Tornado before 6.4.1 CRLF Injection via CurlAsyncHTTPClient
Summary
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.
Severity
5.4 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-17 19:16 UTC
CWE
- CWE-113 - Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting')
Assigner
References
2 references
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|---|---|
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| https://www.vulncheck.com/advisories/tornado-befo… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
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Affected:
0 , < 6.4.1
(semver)
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Date Public
2024-06-06 00:00
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CVE-2024-14029 (GCVE-0-2024-14029)
Vulnerability from nvd – Published: 2026-09-15 15:17 – Updated: 2026-09-15 17:09
VLAI
EPSS
VEX
Title
Tornado before 6.4.1 HTTP Request Smuggling via Transfer-Encoding
Summary
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Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-15 17:07 UTC
CWE
- CWE-444 - Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
Assigner
References
2 references
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|---|---|
| https://github.com/tornadoweb/tornado/security/ad… | vendor-advisory |
| https://www.vulncheck.com/advisories/tornado-befo… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| tornadoweb | tornado |
Affected:
0 , < 6.4.1
(semver)
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Date Public
2024-06-06 00:00
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CVE-2023-54397 (GCVE-0-2023-54397)
Vulnerability from nvd – Published: 2026-09-15 15:17 – Updated: 2026-09-17 14:48
VLAI
EPSS
VEX
Title
Tornado before 6.3.3 HTTP Request Smuggling via Content-Length
Summary
Tornado before 6.3.3 contains an HTTP request smuggling vulnerability due to improper parsing of Content-Length headers accepting non-standard characters. Attackers can send crafted HTTP requests with these characters to bypass proxy validation and smuggle requests when deployed behind certain proxies.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-17 14:48 UTC
CWE
- CWE-444 - Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/tornadoweb/tornado/security/ad… | vendor-advisory |
| https://www.vulncheck.com/advisories/tornado-befo… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| tornadoweb | tornado |
Affected:
0 , < 6.3.3
(semver)
Unaffected: 6.3.3 (semver) cpe:2.3:a:tornadoweb:tornado:*:*:*:*:*:*:*:* |
Date Public
2023-08-12 00:00
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CVE-2026-126347 (GCVE-0-2026-126347)
Vulnerability from cvelistv5 – Published: 2026-11-12 21:52 – Updated: 2026-11-13 19:45
VLAI
EPSS
VEX
Title
Tornado: Open redirect via triple-slash redirect paths
Summary
Tornado is a Python web framework and asynchronous networking library. In versions through 6.6.0, applications using tornado.web.RedirectHandler with URL templates that allow attacker-controlled substitutions to influence the destination can be vulnerable to an open redirect using three or more leading slashes. Differences between Python’s URL parsing and browser URL interpretation allow a crafted destination to redirect a user to an attacker-controlled host. The remediation for CVE-2026-116578 in version 6.6.0 did not fully address this case. This issue is fixed in version 6.6.1.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-13 19:44 UTC
CWE
- CWE-601 - URL Redirection to Untrusted Site
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/tornadoweb/tornado/security/ad… | x_refsource_CONFIRM |
| https://github.com/tornadoweb/tornado/commit/c503… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| tornadoweb | tornado |
Affected:
< 6.6.1
|
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CVE-2026-123535 (GCVE-0-2026-123535)
Vulnerability from cvelistv5 – Published: 2026-11-08 01:37 – Updated: 2026-11-12 14:06
VLAI
EPSS
VEX
Title
Tornado before 6.6 Cookie Attribute Injection via set_cookie max_age
Summary
Tornado before 6.6 does not validate the max_age argument of RequestHandler.set_cookie (also called by set_signed_cookie, set_secure_cookie, and clear_cookie), allowing injection of additional Set-Cookie attributes. When an application passes attacker-influenced input as max_age, an attacker can embed attributes such as Domain, Path, or Secure to widen the cookie's scope to parent paths or other subdomains.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-12 14:06 UTC
CWE
- CWE-74 - Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/tornadoweb/tornado/security/ad… | vendor-advisory |
| https://www.vulncheck.com/advisories/tornado-befo… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| tornadoweb | tornado |
Affected:
0 , < 6.6
(custom)
Unaffected: 6.6 (custom) cpe:2.3:a:tornadoweb:tornado:*:*:*:*:*:*:*:* |
Date Public
2026-10-22 00:00
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CVE-2026-123534 (GCVE-0-2026-123534)
Vulnerability from cvelistv5 – Published: 2026-11-08 01:37 – Updated: 2026-11-09 14:05
VLAI
EPSS
VEX
Title
Tornado before 6.6 Path Traversal via static_url() Version Hashing
Summary
Tornado before 6.6 contains a path traversal vulnerability in RequestHandler.static_url() and get_version() that allows attackers to hash files outside static_path using ../ sequences. Attackers controlling input passed to static_url() can obtain SHA-512 hashes of readable files to confirm their existence, or reference /dev/zero to block the event loop indefinitely.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-09 14:05 UTC
CWE
- CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/tornadoweb/tornado/security/ad… | vendor-advisory |
| https://www.vulncheck.com/advisories/tornado-befo… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| tornadoweb | tornado |
Affected:
0 , < 6.6
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Unaffected: 6.6 (custom) cpe:2.3:a:tornadoweb:tornado:*:*:*:*:*:*:*:* |
Date Public
2026-10-22 00:00
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CVE-2026-116578 (GCVE-0-2026-116578)
Vulnerability from cvelistv5 – Published: 2026-10-26 20:22 – Updated: 2026-10-30 14:28
VLAI
EPSS
VEX
Title
Tornado: Open redirect in RedirectHandler via protocol-relative URLs
Summary
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 resulting open redirect on the application's domain for phishing. This issue is fixed in version 6.6.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-30 14:28 UTC
CWE
- CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://github.com/tornadoweb/tornado/security/ad… | x_refsource_CONFIRM |
| https://github.com/tornadoweb/tornado/pull/3786 | x_refsource_MISC |
| https://github.com/tornadoweb/tornado/commit/940e… | x_refsource_MISC |
| https://github.com/tornadoweb/tornado/commit/cc75… | x_refsource_MISC |
| https://github.com/tornadoweb/tornado/commit/ccb6… | x_refsource_MISC |
| https://github.com/tornadoweb/tornado/releases/ta… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| tornadoweb | tornado |
Affected:
< 6.6
|
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CVE-2026-116577 (GCVE-0-2026-116577)
Vulnerability from cvelistv5 – Published: 2026-10-26 20:20 – Updated: 2026-10-31 01:48
VLAI
EPSS
VEX
Title
Tornado: Quadratic CPU usage when parsing HTTP headers with line folding
Summary
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.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-31 01:48 UTC
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/tornadoweb/tornado/security/ad… | x_refsource_CONFIRM |
| https://github.com/tornadoweb/tornado/pull/3765 | x_refsource_MISC |
| https://github.com/tornadoweb/tornado/commit/1b7a… | x_refsource_MISC |
| https://github.com/tornadoweb/tornado/releases/ta… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| tornadoweb | tornado |
Affected:
< 6.6
|
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CVE-2026-115927 (GCVE-0-2026-115927)
Vulnerability from cvelistv5 – Published: 2026-10-26 19:37 – Updated: 2026-10-27 14:18
VLAI
EPSS
VEX
Title
Tornado: Event loop blocking and excess memory use from chunked bodies with many small chunks
Summary
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-loop behavior when reading a response from a malicious server. This issue is fixed in version 6.6.0.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-27 13:45 UTC
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/tornadoweb/tornado/security/ad… | x_refsource_CONFIRM |
| https://github.com/tornadoweb/tornado/pull/3773 | x_refsource_MISC |
| https://github.com/tornadoweb/tornado/commit/ceab… | x_refsource_MISC |
| https://github.com/tornadoweb/tornado/releases/ta… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| tornadoweb | tornado |
Affected:
< 6.6.0
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CVE-2026-103263 (GCVE-0-2026-103263)
Vulnerability from cvelistv5 – Published: 2026-10-01 10:42 – Updated: 2026-10-01 19:29
VLAI
EPSS
VEX
Title
Tornado before 6.5.9 StaticFileHandler Path Traversal via Symlink
Summary
Tornado before 6.5.9 contains a path traversal vulnerability in StaticFileHandler that follows symbolic links inside the static root without confirming the resolved target stays within it. When a symlink pointing outside the static directory exists inside it, unauthenticated attackers can request it to read files such as configuration files, private keys, and application secrets accessible to the process user.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-01 19:29 UTC
CWE
- CWE-59 - Improper Link Resolution Before File Access ('Link Following')
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/tornadoweb/tornado/security/ad… | vendor-advisory |
| https://github.com/tornadoweb/tornado/commit/437a… | patch |
| https://www.vulncheck.com/advisories/tornado-befo… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| tornadoweb | tornado |
Affected:
0 , < 6.5.9
(semver)
Unaffected: 6.5.9 (semver) cpe:2.3:a:tornadoweb:tornado:*:*:*:*:*:*:*:* |
Date Public
2026-09-14 00:00
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CVE-2026-103262 (GCVE-0-2026-103262)
Vulnerability from cvelistv5 – Published: 2026-10-01 10:42 – Updated: 2026-10-06 00:08
VLAI
EPSS
VEX
Title
Tornado before 6.5.9 Denial of Service via CurlAsyncHTTPClient
Summary
Tornado versions before 6.5.9 contain an unbounded memory accumulation vulnerability in CurlAsyncHTTPClient that allows remote attackers to cause denial of service by sending a compressed response. Attackers can send a gzip-encoded decompression bomb that accumulates in memory without size limits, causing the application process to be killed by out-of-memory conditions.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-06 00:08 UTC
CWE
- CWE-409 - Improper Handling of Highly Compressed Data (Data Amplification)
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/tornadoweb/tornado/security/ad… | vendor-advisory |
| https://github.com/tornadoweb/tornado/commit/e412… | patch |
| https://www.vulncheck.com/advisories/tornado-befo… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| tornadoweb | tornado |
Affected:
0 , < 6.5.9
(semver)
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Date Public
2026-09-14 00:00
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CVE-2026-103261 (GCVE-0-2026-103261)
Vulnerability from cvelistv5 – Published: 2026-10-01 10:42 – Updated: 2026-10-01 14:44
VLAI
EPSS
VEX
Title
Tornado before 6.5.9 Denial of Service via Query String
Summary
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.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-01 14:44 UTC
CWE
- CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/tornadoweb/tornado/security/ad… | vendor-advisory |
| https://github.com/tornadoweb/tornado/commit/0394… | patch |
| https://www.vulncheck.com/advisories/tornado-befo… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| tornadoweb | tornado |
Affected:
0 , < 6.5.9
(semver)
Unaffected: 6.5.9 (semver) cpe:2.3:a:tornadoweb:tornado:*:*:*:*:*:*:*:* |
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2026-09-14 00:00
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CVE-2026-91992 (GCVE-0-2026-91992)
Vulnerability from cvelistv5 – Published: 2026-09-15 15:18 – Updated: 2026-09-17 15:16
VLAI
EPSS
VEX
Title
Tornado before 6.5.7 Credential Leak via Handle Reuse
Summary
Tornado before 6.5.7 contains a credential leak vulnerability in CurlAsyncHTTPClient where pycurl handles are reused across requests without proper state clearing. Attackers can obtain sensitive credentials by issuing requests through the same client instance, allowing TLS certificates or proxy authentication to persist across unintended requests.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-17 15:16 UTC
CWE
- CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/tornadoweb/tornado/security/ad… | vendor-advisory |
| https://www.vulncheck.com/advisories/tornado-befo… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| tornadoweb | tornado |
Affected:
0 , < 6.5.7
(semver)
Unaffected: 6.5.7 (semver) cpe:2.3:a:tornadoweb:tornado:*:*:*:*:*:*:*:* |
Date Public
2026-06-08 00:00
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CVE-2026-91991 (GCVE-0-2026-91991)
Vulnerability from cvelistv5 – Published: 2026-09-15 15:18 – Updated: 2026-10-08 15:26
VLAI
EPSS
VEX
Title
Tornado before 6.5.8 Cookie Attribute Injection via Capitalized kwargs
Summary
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.
Severity
5.4 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-21 19:14 UTC
CWE
- CWE-113 - Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/tornadoweb/tornado/security/ad… | vendor-advisory |
| https://www.vulncheck.com/advisories/tornado-befo… | third-party-advisory |
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1 product
| Vendor | Product | Version | |
|---|---|---|---|
| tornadoweb | tornado |
Affected:
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(semver)
Unaffected: 6.5.8 (semver) cpe:2.3:a:tornadoweb:tornado:*:*:*:*:*:*:*:* |
Date Public
2026-08-07 00:00
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CVE-2026-91990 (GCVE-0-2026-91990)
Vulnerability from cvelistv5 – Published: 2026-09-15 15:18 – Updated: 2026-09-15 16:05
VLAI
EPSS
VEX
Title
Tornado before 6.5.8 Memory Amplification DoS via multipart
Summary
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Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-15 16:04 UTC
CWE
- CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
2 references
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|---|---|
| https://github.com/tornadoweb/tornado/security/ad… | vendor-advisory |
| https://www.vulncheck.com/advisories/tornado-befo… | third-party-advisory |
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1 product
| Vendor | Product | Version | |
|---|---|---|---|
| tornadoweb | tornado |
Affected:
0 , < 6.5.8
(semver)
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2026-08-07 00:00
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CVE-2024-58384 (GCVE-0-2024-58384)
Vulnerability from cvelistv5 – Published: 2026-09-15 15:17 – Updated: 2026-09-17 19:29
VLAI
EPSS
VEX
Title
Tornado before 6.4.1 CRLF Injection via CurlAsyncHTTPClient
Summary
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.
Severity
5.4 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-17 19:16 UTC
CWE
- CWE-113 - Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/tornadoweb/tornado/security/ad… | vendor-advisory |
| https://www.vulncheck.com/advisories/tornado-befo… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| tornadoweb | tornado |
Affected:
0 , < 6.4.1
(semver)
Unaffected: 6.4.1 (semver) cpe:2.3:a:tornadoweb:tornado:*:*:*:*:*:*:*:* |
Date Public
2024-06-06 00:00
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CVE-2024-14029 (GCVE-0-2024-14029)
Vulnerability from cvelistv5 – Published: 2026-09-15 15:17 – Updated: 2026-09-15 17:09
VLAI
EPSS
VEX
Title
Tornado before 6.4.1 HTTP Request Smuggling via Transfer-Encoding
Summary
Tornado before 6.4.1 ignores duplicate Transfer-Encoding: chunked headers, treating requests as having no message body and parsing the chunked body as a subsequent request. Attackers can exploit this inconsistency when Tornado is deployed behind proxies to perform HTTP request smuggling, enabling access control bypass, cache poisoning, or connection desynchronization.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-15 17:07 UTC
CWE
- CWE-444 - Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/tornadoweb/tornado/security/ad… | vendor-advisory |
| https://www.vulncheck.com/advisories/tornado-befo… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| tornadoweb | tornado |
Affected:
0 , < 6.4.1
(semver)
Unaffected: 6.4.1 (semver) cpe:2.3:a:tornadoweb:tornado:*:*:*:*:*:*:*:* |
Date Public
2024-06-06 00:00
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CVE-2023-54397 (GCVE-0-2023-54397)
Vulnerability from cvelistv5 – Published: 2026-09-15 15:17 – Updated: 2026-09-17 14:48
VLAI
EPSS
VEX
Title
Tornado before 6.3.3 HTTP Request Smuggling via Content-Length
Summary
Tornado before 6.3.3 contains an HTTP request smuggling vulnerability due to improper parsing of Content-Length headers accepting non-standard characters. Attackers can send crafted HTTP requests with these characters to bypass proxy validation and smuggle requests when deployed behind certain proxies.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-17 14:48 UTC
CWE
- CWE-444 - Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/tornadoweb/tornado/security/ad… | vendor-advisory |
| https://www.vulncheck.com/advisories/tornado-befo… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| tornadoweb | tornado |
Affected:
0 , < 6.3.3
(semver)
Unaffected: 6.3.3 (semver) cpe:2.3:a:tornadoweb:tornado:*:*:*:*:*:*:*:* |
Date Public
2023-08-12 00:00
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