{"affected":[{"product":"readest","source":"CNA: GitHub_M","vendor":"readest","versions":[{"status":"affected","version":"< 0.11.10"}]}],"cveId":"CVE-2026-57566","cwes":["CWE-918"],"description":"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.","epss":null,"exploits":[],"kev":null,"metrics":[{"score":9.3,"severity":"critical","source":"CNA: GitHub_M","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N","version":"3.1"}],"modifiedAt":1793828667349,"publishedAt":1793828667349,"references":[{"source":"CNA: GitHub_M","tags":["x_refsource_CONFIRM"],"url":"https://github.com/readest/readest/security/advisories/GHSA-c7mm-g2j2-98cx"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/readest/readest/pull/4638"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/readest/readest/commit/495783d04516d05b2eb10f8f8bad297d436b36de"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/readest/readest/releases/tag/v0.11.10"}],"remediation":[],"revision":"afc32180cfa656eb9efcfb717494610c4f0918e1bc205d7f47d5770b7512b71d","sources":[{"modifiedAt":1793828667349,"name":"CNA: GitHub_M","retrievedAt":1793830388199,"url":"https://www.cve.org/CVERecord?id=CVE-2026-57566"}],"ssvc":null,"status":"published","title":"Readest: Unauthenticated SSRF / open request proxy in /api/opds/proxy","updatedAt":1793830388199}