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12 vulnerabilities found for starlette by Kludex
CVE-2026-54283 (GCVE-0-2026-54283)
Vulnerability from nvd – Published: 2026-06-22 16:46 – Updated: 2026-06-23 16:10
VLAI
Title
Starlette: request.form() limits silently ignored for application/x-www-form-urlencoded enable DoS
Summary
Starlette is a lightweight ASGI framework/toolkit. From 0.4.1 until 1.3.1, request.form() accepts max_fields and max_part_size to bound resource consumption while parsing form data. These limits are enforced for multipart/form-data, but silently ignored for application/x-www-form-urlencoded. An unauthenticated attacker can therefore send a urlencoded body with an arbitrarily large number of fields or an arbitrarily large field, even when the application configured limits it believed would apply. This vulnerability is fixed in 1.3.1.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/Kludex/starlette/security/advi… | x_refsource_CONFIRM |
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CVE-2026-54282 (GCVE-0-2026-54282)
Vulnerability from nvd – Published: 2026-06-22 16:45 – Updated: 2026-06-22 17:26
VLAI
Title
Starlette: Unvalidated request path concatenated into authority poisons request.url.hostname
Summary
Starlette is a lightweight ASGI framework/toolkit. Prior to 1.3.0, the HTTP request path is not validated before being used to reconstruct request.url. Because request.url is rebuilt by concatenating {scheme}://{host}{path} and re-parsing the result, a path that does not begin with / (for example @google.com) moves the authority boundary during re-parsing, so request.url.hostname and request.url.netloc become attacker-controlled. Code that reads request.url.hostname (rather than the Host header or scope) can therefore be misled into trusting an attacker-supplied host. This vulnerability is fixed in 1.3.0.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-706 - Use of Incorrectly-Resolved Name or Reference
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/Kludex/starlette/security/advi… | x_refsource_CONFIRM |
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CVE-2026-48817 (GCVE-0-2026-48817)
Vulnerability from nvd – Published: 2026-06-17 19:48 – Updated: 2026-06-18 13:54
VLAI
Title
Starlette: Arbitrary HTTP method dispatched to `HTTPEndpoint` attributes via `getattr`
Summary
Starlette is a lightweight ASGI framework/toolkit. In versions 1.0.1 and below, when dispatching a request, HTTPEndpoint selects the handler by lowercasing the HTTP method and looking it up as an attribute with getattr, without restricting the lookup to a known set of HTTP verbs. When an HTTPEndpoint subclass is registered through Route(...) without an explicit methods= argument, the route does not constrain the method and every method reaches the endpoint. If a non-standard HTTP method whose lowercased name matches an attribute on the endpoint subclass reaches the endpoint, that attribute is invoked as if it were a request handler. An attacker can use this to reach methods that were never meant to be HTTP handlers, such as internal helpers, without the authorization checks applied by the intended public handler. An application (including Starlette-based frameworks like FastAPI) is affected if it registers an HTTPEndpoint subclass via Route(...) without explicitly setting methods=, and that subclass includes extra methods named like non-standard HTTP verbs that take one request argument and return a response. This issue has been fixed in version 1.1.0.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-470 - Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/Kludex/starlette/security/advi… | x_refsource_CONFIRM |
| https://github.com/Kludex/starlette/releases/tag/1.1.0 | x_refsource_MISC |
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CVE-2026-48818 (GCVE-0-2026-48818)
Vulnerability from nvd – Published: 2026-06-17 17:50 – Updated: 2026-06-30 12:09
VLAI
Title
Starlette: SSRF and NTLM credential theft via UNC paths in StaticFiles on Windows
Summary
Starlette is a lightweight ASGI framework/toolkit. In versions 1.0.1 and earlier, StaticFiles on Windows is vulnerable to SSRF. An UNC path such as \\attacker.com\share can cause os.path.realpath to initiate an outbound SMB connection before the path is rejected, exposing the service account’s NTLMv2 credentials for offline cracking or relay even though the HTTP response is only a 404. The issue affects default follow_symlink=False deployments, including frameworks built on Starlette such as FastAPI; POSIX systems and follow_symlink=True are unaffected. The issue is fixed in 1.1.0.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-918 - Server-Side Request Forgery (SSRF)
Assigner
References
10 references
| URL | Tags |
|---|---|
| https://github.com/Kludex/starlette/security/advi… | x_refsource_CONFIRM |
| https://github.com/Kludex/starlette/pull/3287 | x_refsource_MISC |
| https://github.com/Kludex/starlette/commit/fd5316… | x_refsource_MISC |
| https://github.com/Kludex/starlette/releases/tag/1.1.0 | x_refsource_MISC |
| https://access.redhat.com/security/cve/CVE-2026-48818 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2490020 | issue-trackingx_refsource_REDHAT |
| https://security.access.redhat.com/data/csaf/v2/v… | x_sadp-csaf-vex |
| https://access.redhat.com/errata/RHSA-2026:30089 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:30088 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:30087 | vendor-advisoryx_refsource_REDHAT |
Impacted products
11 products
| Vendor | Product | Version | |
|---|---|---|---|
| Kludex | starlette |
Affected:
< 1.1.0
|
|
| Red Hat | Red Hat AI Inference Server 3.3 |
cpe:/a:redhat:ai_inference_server:3.3::el9 |
|
| Red Hat | Exploit Intelligence |
cpe:/a:redhat:exploit_intelligence:0 |
|
| Red Hat | Migration Toolkit for Applications 8 |
cpe:/a:redhat:migration_toolkit_applications:8 |
|
| Red Hat | OpenShift Lightspeed |
cpe:/a:redhat:openshift_lightspeed |
|
| Red Hat | Red Hat AI Inference Server |
cpe:/a:redhat:ai_inference_server:3 |
|
| Red Hat | Red Hat Ansible Automation Platform 2 |
cpe:/a:redhat:ansible_automation_platform:2 |
|
| Red Hat | Red Hat Enterprise Linux AI (RHEL AI) 3 |
cpe:/a:redhat:enterprise_linux_ai:3 |
|
| Red Hat | Red Hat Hardened Images |
cpe:/a:redhat:hummingbird:1 |
|
| Red Hat | Red Hat OpenShift AI (RHOAI) |
cpe:/a:redhat:openshift_ai |
|
| Red Hat | Red Hat Satellite 6 |
cpe:/a:redhat:satellite:6 |
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CVE-2026-48710 (GCVE-0-2026-48710)
Vulnerability from nvd – Published: 2026-05-26 21:54 – Updated: 2026-07-02 12:04
VLAI
Title
Starlette has missing Host header validation that poisons request.url.path, bypassing path-based security checks
Summary
Starlette is a lightweight ASGI framework/toolkit. Prior to version 1.0.1, the HTTP `Host` request header was not validated before being used to reconstruct `request.url`. Because the routing algorithm relies on the raw HTTP path while `request.url` is rebuilt from the `Host` header, a malformed header could make `request.url.path` differ from the path that was actually requested. Middleware and endpoints that apply security restrictions based on `request.url` (rather than the raw `scope` path) could therefore be bypassed. Users should upgrade to a version greater than or equal to version 1.0.1, which validates the `Host` header against the grammar of RFC 9112 §3.2 / RFC 3986 §3.2.2 when constructing `request.url` and falls back to `scope["server"]` for malformed values.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
20 references
Impacted products
15 products
| Vendor | Product | Version | |
|---|---|---|---|
| Kludex | starlette |
Affected:
< 1.0.1
|
|
| Red Hat | Red Hat AI Inference Server 3.3 |
cpe:/a:redhat:ai_inference_server:3.3::el9 |
|
| Red Hat | Red Hat Ansible Automation Platform 2.6 |
cpe:/a:redhat:ansible_automation_platform:2.6::el9 |
|
| Red Hat | Red Hat Ansible Automation Platform 2.7 |
cpe:/a:redhat:ansible_automation_platform:2.7::el9 |
|
| Red Hat | Red Hat OpenShift AI 3.4 |
cpe:/a:redhat:openshift_ai:3.4::el9 |
|
| Red Hat | Red Hat Satellite 6.18 |
cpe:/a:redhat:satellite:6.18::el9 |
|
| Red Hat | Red Hat Satellite 6.19 |
cpe:/a:redhat:satellite:6.19::el9 |
|
| Red Hat | Exploit Intelligence |
cpe:/a:redhat:exploit_intelligence:0 |
|
| Red Hat | Migration Toolkit for Applications 8 |
cpe:/a:redhat:migration_toolkit_applications:8 |
|
| Red Hat | OpenShift Lightspeed |
cpe:/a:redhat:openshift_lightspeed |
|
| Red Hat | Red Hat AI Inference Server |
cpe:/a:redhat:ai_inference_server:3 |
|
| Red Hat | Red Hat Enterprise Linux AI (RHEL AI) 3 |
cpe:/a:redhat:enterprise_linux_ai:3 |
|
| Red Hat | Red Hat OpenShift AI (RHOAI) |
cpe:/a:redhat:openshift_ai |
|
| Red Hat | Red Hat Satellite 6 |
cpe:/a:redhat:satellite:6 |
|
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cpe:/a:redhat:ansible_automation_platform:2 |
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CVE-2025-62727 (GCVE-0-2025-62727)
Vulnerability from nvd – Published: 2025-10-28 20:14 – Updated: 2025-11-04 17:41
VLAI
Title
Starlette vulnerable to O(n^2) DoS via Range header merging in starlette.responses.FileResponse
Summary
Starlette is a lightweight ASGI framework/toolkit. Starting in version 0.39.0 and prior to version 0.49.1 , an unauthenticated attacker can send a crafted HTTP Range header that triggers quadratic-time processing in Starlette's FileResponse Range parsing/merging logic. This enables CPU exhaustion per request, causing denial‑of‑service for endpoints serving files (e.g., StaticFiles or any use of FileResponse). This vulnerability is fixed in 0.49.1.
Severity
7.5 (High)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-407 - Inefficient Algorithmic Complexity
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/Kludex/starlette/security/advi… | x_refsource_CONFIRM |
| https://github.com/Kludex/starlette/commit/4ea6e2… | x_refsource_MISC |
| https://github.com/Kludex/starlette/commit/69ed26… | x_refsource_MISC |
| https://github.com/Kludex/starlette/releases/tag/0.49.1 | x_refsource_MISC |
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CVE-2026-54283 (GCVE-0-2026-54283)
Vulnerability from cvelistv5 – Published: 2026-06-22 16:46 – Updated: 2026-06-23 16:10
VLAI
Title
Starlette: request.form() limits silently ignored for application/x-www-form-urlencoded enable DoS
Summary
Starlette is a lightweight ASGI framework/toolkit. From 0.4.1 until 1.3.1, request.form() accepts max_fields and max_part_size to bound resource consumption while parsing form data. These limits are enforced for multipart/form-data, but silently ignored for application/x-www-form-urlencoded. An unauthenticated attacker can therefore send a urlencoded body with an arbitrarily large number of fields or an arbitrarily large field, even when the application configured limits it believed would apply. This vulnerability is fixed in 1.3.1.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/Kludex/starlette/security/advi… | x_refsource_CONFIRM |
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CVE-2026-54282 (GCVE-0-2026-54282)
Vulnerability from cvelistv5 – Published: 2026-06-22 16:45 – Updated: 2026-06-22 17:26
VLAI
Title
Starlette: Unvalidated request path concatenated into authority poisons request.url.hostname
Summary
Starlette is a lightweight ASGI framework/toolkit. Prior to 1.3.0, the HTTP request path is not validated before being used to reconstruct request.url. Because request.url is rebuilt by concatenating {scheme}://{host}{path} and re-parsing the result, a path that does not begin with / (for example @google.com) moves the authority boundary during re-parsing, so request.url.hostname and request.url.netloc become attacker-controlled. Code that reads request.url.hostname (rather than the Host header or scope) can therefore be misled into trusting an attacker-supplied host. This vulnerability is fixed in 1.3.0.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-706 - Use of Incorrectly-Resolved Name or Reference
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/Kludex/starlette/security/advi… | x_refsource_CONFIRM |
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CVE-2026-48817 (GCVE-0-2026-48817)
Vulnerability from cvelistv5 – Published: 2026-06-17 19:48 – Updated: 2026-06-18 13:54
VLAI
Title
Starlette: Arbitrary HTTP method dispatched to `HTTPEndpoint` attributes via `getattr`
Summary
Starlette is a lightweight ASGI framework/toolkit. In versions 1.0.1 and below, when dispatching a request, HTTPEndpoint selects the handler by lowercasing the HTTP method and looking it up as an attribute with getattr, without restricting the lookup to a known set of HTTP verbs. When an HTTPEndpoint subclass is registered through Route(...) without an explicit methods= argument, the route does not constrain the method and every method reaches the endpoint. If a non-standard HTTP method whose lowercased name matches an attribute on the endpoint subclass reaches the endpoint, that attribute is invoked as if it were a request handler. An attacker can use this to reach methods that were never meant to be HTTP handlers, such as internal helpers, without the authorization checks applied by the intended public handler. An application (including Starlette-based frameworks like FastAPI) is affected if it registers an HTTPEndpoint subclass via Route(...) without explicitly setting methods=, and that subclass includes extra methods named like non-standard HTTP verbs that take one request argument and return a response. This issue has been fixed in version 1.1.0.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-470 - Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/Kludex/starlette/security/advi… | x_refsource_CONFIRM |
| https://github.com/Kludex/starlette/releases/tag/1.1.0 | x_refsource_MISC |
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CVE-2026-48818 (GCVE-0-2026-48818)
Vulnerability from cvelistv5 – Published: 2026-06-17 17:50 – Updated: 2026-06-30 12:09
VLAI
Title
Starlette: SSRF and NTLM credential theft via UNC paths in StaticFiles on Windows
Summary
Starlette is a lightweight ASGI framework/toolkit. In versions 1.0.1 and earlier, StaticFiles on Windows is vulnerable to SSRF. An UNC path such as \\attacker.com\share can cause os.path.realpath to initiate an outbound SMB connection before the path is rejected, exposing the service account’s NTLMv2 credentials for offline cracking or relay even though the HTTP response is only a 404. The issue affects default follow_symlink=False deployments, including frameworks built on Starlette such as FastAPI; POSIX systems and follow_symlink=True are unaffected. The issue is fixed in 1.1.0.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-918 - Server-Side Request Forgery (SSRF)
Assigner
References
10 references
| URL | Tags |
|---|---|
| https://github.com/Kludex/starlette/security/advi… | x_refsource_CONFIRM |
| https://github.com/Kludex/starlette/pull/3287 | x_refsource_MISC |
| https://github.com/Kludex/starlette/commit/fd5316… | x_refsource_MISC |
| https://github.com/Kludex/starlette/releases/tag/1.1.0 | x_refsource_MISC |
| https://access.redhat.com/security/cve/CVE-2026-48818 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2490020 | issue-trackingx_refsource_REDHAT |
| https://security.access.redhat.com/data/csaf/v2/v… | x_sadp-csaf-vex |
| https://access.redhat.com/errata/RHSA-2026:30089 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:30088 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:30087 | vendor-advisoryx_refsource_REDHAT |
Impacted products
11 products
| Vendor | Product | Version | |
|---|---|---|---|
| Kludex | starlette |
Affected:
< 1.1.0
|
|
| Red Hat | Red Hat AI Inference Server 3.3 |
cpe:/a:redhat:ai_inference_server:3.3::el9 |
|
| Red Hat | Exploit Intelligence |
cpe:/a:redhat:exploit_intelligence:0 |
|
| Red Hat | Migration Toolkit for Applications 8 |
cpe:/a:redhat:migration_toolkit_applications:8 |
|
| Red Hat | OpenShift Lightspeed |
cpe:/a:redhat:openshift_lightspeed |
|
| Red Hat | Red Hat AI Inference Server |
cpe:/a:redhat:ai_inference_server:3 |
|
| Red Hat | Red Hat Ansible Automation Platform 2 |
cpe:/a:redhat:ansible_automation_platform:2 |
|
| Red Hat | Red Hat Enterprise Linux AI (RHEL AI) 3 |
cpe:/a:redhat:enterprise_linux_ai:3 |
|
| Red Hat | Red Hat Hardened Images |
cpe:/a:redhat:hummingbird:1 |
|
| Red Hat | Red Hat OpenShift AI (RHOAI) |
cpe:/a:redhat:openshift_ai |
|
| Red Hat | Red Hat Satellite 6 |
cpe:/a:redhat:satellite:6 |
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CVE-2026-48710 (GCVE-0-2026-48710)
Vulnerability from cvelistv5 – Published: 2026-05-26 21:54 – Updated: 2026-07-02 12:04
VLAI
Title
Starlette has missing Host header validation that poisons request.url.path, bypassing path-based security checks
Summary
Starlette is a lightweight ASGI framework/toolkit. Prior to version 1.0.1, the HTTP `Host` request header was not validated before being used to reconstruct `request.url`. Because the routing algorithm relies on the raw HTTP path while `request.url` is rebuilt from the `Host` header, a malformed header could make `request.url.path` differ from the path that was actually requested. Middleware and endpoints that apply security restrictions based on `request.url` (rather than the raw `scope` path) could therefore be bypassed. Users should upgrade to a version greater than or equal to version 1.0.1, which validates the `Host` header against the grammar of RFC 9112 §3.2 / RFC 3986 §3.2.2 when constructing `request.url` and falls back to `scope["server"]` for malformed values.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
20 references
Impacted products
15 products
| Vendor | Product | Version | |
|---|---|---|---|
| Kludex | starlette |
Affected:
< 1.0.1
|
|
| Red Hat | Red Hat AI Inference Server 3.3 |
cpe:/a:redhat:ai_inference_server:3.3::el9 |
|
| Red Hat | Red Hat Ansible Automation Platform 2.6 |
cpe:/a:redhat:ansible_automation_platform:2.6::el9 |
|
| Red Hat | Red Hat Ansible Automation Platform 2.7 |
cpe:/a:redhat:ansible_automation_platform:2.7::el9 |
|
| Red Hat | Red Hat OpenShift AI 3.4 |
cpe:/a:redhat:openshift_ai:3.4::el9 |
|
| Red Hat | Red Hat Satellite 6.18 |
cpe:/a:redhat:satellite:6.18::el9 |
|
| Red Hat | Red Hat Satellite 6.19 |
cpe:/a:redhat:satellite:6.19::el9 |
|
| Red Hat | Exploit Intelligence |
cpe:/a:redhat:exploit_intelligence:0 |
|
| Red Hat | Migration Toolkit for Applications 8 |
cpe:/a:redhat:migration_toolkit_applications:8 |
|
| Red Hat | OpenShift Lightspeed |
cpe:/a:redhat:openshift_lightspeed |
|
| Red Hat | Red Hat AI Inference Server |
cpe:/a:redhat:ai_inference_server:3 |
|
| Red Hat | Red Hat Enterprise Linux AI (RHEL AI) 3 |
cpe:/a:redhat:enterprise_linux_ai:3 |
|
| Red Hat | Red Hat OpenShift AI (RHOAI) |
cpe:/a:redhat:openshift_ai |
|
| Red Hat | Red Hat Satellite 6 |
cpe:/a:redhat:satellite:6 |
|
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cpe:/a:redhat:ansible_automation_platform:2 |
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CVE-2025-62727 (GCVE-0-2025-62727)
Vulnerability from cvelistv5 – Published: 2025-10-28 20:14 – Updated: 2025-11-04 17:41
VLAI
Title
Starlette vulnerable to O(n^2) DoS via Range header merging in starlette.responses.FileResponse
Summary
Starlette is a lightweight ASGI framework/toolkit. Starting in version 0.39.0 and prior to version 0.49.1 , an unauthenticated attacker can send a crafted HTTP Range header that triggers quadratic-time processing in Starlette's FileResponse Range parsing/merging logic. This enables CPU exhaustion per request, causing denial‑of‑service for endpoints serving files (e.g., StaticFiles or any use of FileResponse). This vulnerability is fixed in 0.49.1.
Severity
7.5 (High)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-407 - Inefficient Algorithmic Complexity
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/Kludex/starlette/security/advi… | x_refsource_CONFIRM |
| https://github.com/Kludex/starlette/commit/4ea6e2… | x_refsource_MISC |
| https://github.com/Kludex/starlette/commit/69ed26… | x_refsource_MISC |
| https://github.com/Kludex/starlette/releases/tag/0.49.1 | x_refsource_MISC |
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