CVE-2026-57562
Readest: Subscription/entitlement hijack: /api/stripe/check binds any paid Checkout Session to the caller
Readest is a modern, feature-rich ebook reader designed for seamless cross-platform access and an intuitive reading experience. Prior to 0.11.10, POST /api/stripe/check in apps/readest-app/src/app/api/stripe/check/route.ts accepted a client-controlled sessionId, retrieved the corresponding Stripe Checkout Session, and granted the paid plan to the authenticated caller without verifying session.metadata.userId. The createOrUpdateSubscription path then updated the plans row keyed by the caller's user identifier rather than the Checkout Session owner. Any authenticated free user with a paid active Checkout Session identifier, including one from the user's own single legitimate purchase, could replay that identifier to upgrade additional accounts without payment. This issue is fixed in version 0.11.10.
Fixes and workarounds
No remediation reported in collected sources.
Missing remediation information is not evidence that no patch exists.
Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| readest readest |
< 0.11.10 (affected) | CNA: GitHub_M |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 3.1 / 6.5 medium |
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N | CNA: GitHub_M |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://github.com/readest/readest/security/advisories/GHSA-pv88-3727-j7v8CNA: GitHub_M · x_refsource_CONFIRM
- https://github.com/readest/readest/pull/4638CNA: GitHub_M · x_refsource_MISC
- https://github.com/readest/readest/commit/495783d04516d05b2eb10f8f8bad297d436b36deCNA: GitHub_M · x_refsource_MISC
- https://github.com/readest/readest/releases/tag/v0.11.10CNA: GitHub_M · x_refsource_MISC
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