Sinatra is a domain-specific language for creating web applications in Ruby. In versions prior to 4.2.0, there is a denial of service vulnerability in the `If-Match` and `If-None-Match` header parsing component of Sinatra, if the `etag` method is used when constructing the response. Carefully crafted input can cause `If-Match` and `If-None-Match` header parsing in Sinatra to take an unexpected amount of time, possibly resulting in a denial of service attack vector. This header is typically involved in generating the `ETag` header value. Any applications that use the `etag` method when generating a response are impacted. Version 4.2.0 fixes the issue.
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Fri, 10 Oct 2025 21:15:00 +0000
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Fri, 10 Oct 2025 19:45:00 +0000
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Description | Sinatra is a domain-specific language for creating web applications in Ruby. In versions prior to 4.2.0, there is a denial of service vulnerability in the `If-Match` and `If-None-Match` header parsing component of Sinatra, if the `etag` method is used when constructing the response. Carefully crafted input can cause `If-Match` and `If-None-Match` header parsing in Sinatra to take an unexpected amount of time, possibly resulting in a denial of service attack vector. This header is typically involved in generating the `ETag` header value. Any applications that use the `etag` method when generating a response are impacted. Version 4.2.0 fixes the issue. | |
Title | Sinatra has ReDoS vulnerability in ETag header value generation | |
Weaknesses | CWE-1333 | |
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cvssV4_0
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Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2025-10-10T20:54:47.627Z
Reserved: 2025-10-03T22:21:59.615Z
Link: CVE-2025-61921

Updated: 2025-10-10T20:54:28.101Z

Status : Received
Published: 2025-10-10T20:15:38.067
Modified: 2025-10-10T20:15:38.067
Link: CVE-2025-61921

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