{"id":"CVE-2026-57566","title":"Readest: Unauthenticated SSRF / open request proxy in /api/opds/proxy","summary":"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.…","severity":"critical","cvss":9.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N","cvssSource":"cna","cwe":["CWE-918"],"vendor":"readest","product":"readest","affected":["readest < 0.11.10"],"ssvc":{"exploitation":"poc","automatable":"yes","technicalImpact":"partial","timestamp":"2026-11-05T20:04:36.472248Z"},"exploitAvailable":true,"published":"2026-11-04","updated":"2026-11-05","sourceUpdated":"2026-11-05T20:04:58.115Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-57566","references":[{"url":"https://github.com/readest/readest/security/advisories/GHSA-c7mm-g2j2-98cx","label":"https://github.com/readest/readest/security/advisories/GHSA-c7mm-g2j2-98cx"},{"url":"https://github.com/readest/readest/pull/4638","label":"https://github.com/readest/readest/pull/4638"},{"url":"https://github.com/readest/readest/commit/495783d04516d05b2eb10f8f8bad297d436b36de","label":"https://github.com/readest/readest/commit/495783d04516d05b2eb10f8f8bad297d436b36de"},{"url":"https://github.com/readest/readest/releases/tag/v0.11.10","label":"https://github.com/readest/readest/releases/tag/v0.11.10"}],"tags":["cve.org","exploit-available"],"epss":0.00581,"epssPercentile":0.48016,"ingestedAt":"2026-11-05T22:38:31.695Z","slug":"CVE-2026-57566","body":"## Overview\n\nReadest 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.\n\n## Affected\n\n- `readest < 0.11.10`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"abyssal","depthScore":63,"depthScoreParts":{"impact":51.2,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[]}