{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2025-61921","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2025-10-03T22:21:59.615Z","datePublished":"2025-10-10T19:28:10.688Z","dateUpdated":"2025-10-10T20:54:47.627Z"},"containers":{"cna":{"title":"Sinatra has ReDoS vulnerability in ETag header value generation","problemTypes":[{"descriptions":[{"cweId":"CWE-1333","lang":"en","description":"CWE-1333: Inefficient Regular Expression Complexity","type":"CWE"}]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"LOW","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":2.7,"baseSeverity":"LOW","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U","version":"4.0"}}],"references":[{"name":"https://github.com/sinatra/sinatra/security/advisories/GHSA-mr3q-g2mv-mr4q","tags":["x_refsource_CONFIRM"],"url":"https://github.com/sinatra/sinatra/security/advisories/GHSA-mr3q-g2mv-mr4q"},{"name":"https://github.com/sinatra/sinatra/issues/2120","tags":["x_refsource_MISC"],"url":"https://github.com/sinatra/sinatra/issues/2120"},{"name":"https://github.com/sinatra/sinatra/pull/1823","tags":["x_refsource_MISC"],"url":"https://github.com/sinatra/sinatra/pull/1823"},{"name":"https://github.com/sinatra/sinatra/pull/2121","tags":["x_refsource_MISC"],"url":"https://github.com/sinatra/sinatra/pull/2121"},{"name":"https://bugs.ruby-lang.org/issues/19104","tags":["x_refsource_MISC"],"url":"https://bugs.ruby-lang.org/issues/19104"}],"affected":[{"vendor":"sinatra","product":"sinatra","versions":[{"version":"< 4.2.0","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2025-10-10T19:28:10.688Z"},"descriptions":[{"lang":"en","value":"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."}],"source":{"advisory":"GHSA-mr3q-g2mv-mr4q","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2025-10-10T20:54:24.202335Z","id":"CVE-2025-61921","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2025-10-10T20:54:47.627Z"}}]}}