{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-57566","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-06-24T18:49:56.206Z","datePublished":"2026-11-04T21:44:27.349Z","dateUpdated":"2026-11-05T20:04:58.115Z"},"containers":{"cna":{"title":"Readest: Unauthenticated SSRF / open request proxy in /api/opds/proxy","problemTypes":[{"descriptions":[{"cweId":"CWE-918","lang":"en","description":"CWE-918: Server-Side Request Forgery (SSRF)","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":9.3,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N","version":"3.1"}}],"references":[{"name":"https://github.com/readest/readest/security/advisories/GHSA-c7mm-g2j2-98cx","tags":["x_refsource_CONFIRM"],"url":"https://github.com/readest/readest/security/advisories/GHSA-c7mm-g2j2-98cx"},{"name":"https://github.com/readest/readest/pull/4638","tags":["x_refsource_MISC"],"url":"https://github.com/readest/readest/pull/4638"},{"name":"https://github.com/readest/readest/commit/495783d04516d05b2eb10f8f8bad297d436b36de","tags":["x_refsource_MISC"],"url":"https://github.com/readest/readest/commit/495783d04516d05b2eb10f8f8bad297d436b36de"},{"name":"https://github.com/readest/readest/releases/tag/v0.11.10","tags":["x_refsource_MISC"],"url":"https://github.com/readest/readest/releases/tag/v0.11.10"}],"affected":[{"vendor":"readest","product":"readest","versions":[{"version":"< 0.11.10","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-11-04T21:44:27.349Z"},"descriptions":[{"lang":"en","value":"Readest is a modern, feature-rich ebook reader designed for seamless cross-platform access and an intuitive reading experience. Prior to 0.11.10, the unauthenticated /api/opds/proxy route in apps/readest-app/src/app/api/opds/proxy/route.ts accepted an attacker-controlled URL and fetched it server-side without restricting the scheme, blocking private, loopback, link-local, or metadata hosts, or revalidating destinations during automatic redirect following. The route also accepted caller-controlled outbound headers and Authorization values and reflected the upstream status and response body. A remote attacker could use the service as an open request proxy and, on Node, Docker, or other self-hosted deployments with internal-network access, retrieve cloud metadata or internal-service responses. Cloudflare Workers deployments restrict access to link-local and private destinations, which reduces the internal-network impact there, but the unauthenticated public fetch-and-reflect behavior remains. This issue is fixed in version 0.11.10."}],"source":{"advisory":"GHSA-c7mm-g2j2-98cx","discovery":"UNKNOWN"}},"adp":[{"references":[{"url":"https://github.com/readest/readest/security/advisories/GHSA-c7mm-g2j2-98cx","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-11-05T20:04:36.472248Z","id":"CVE-2026-57566","options":[{"Exploitation":"poc"},{"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":"2026-11-05T20:04:58.115Z"}}]}}