https://patchthecve.com/CVEs with upgrade or downgrade fix stepshttps://patchthecve.com/cve/CVE-2021-29485.htmlhttps://patchthecve.com/cve/CVE-2021-29485.htmlWed, 17 Jun 2026 03:47:44 +0000CRITICAL 9.9: Ratpack is a toolkit for creating web applications. In versions prior to 1.9.0, a malicious attacker can achieve Remote Code Execution (RCE) via a maliciously crafted Java deserialization gadget chain leveraged against the Ratpack session store. If one's application does not use Ratpack's session mehttps://patchthecve.com/cve/CVE-2021-29481.htmlhttps://patchthecve.com/cve/CVE-2021-29481.htmlWed, 17 Jun 2026 03:47:43 +0000MEDIUM 6.5: Ratpack is a toolkit for creating web applications. In versions prior to 1.9.0, the default configuration of client side sessions results in unencrypted, but signed, data being set as cookie values. This means that if something sensitive goes into the session, it could be read by something with accehttps://patchthecve.com/cve/CVE-2021-29480.htmlhttps://patchthecve.com/cve/CVE-2021-29480.htmlWed, 17 Jun 2026 03:47:43 +0000MEDIUM 4.4: Ratpack is a toolkit for creating web applications. In versions prior to 1.9.0, the client side session module uses the application startup time as the signing key by default. This means that if an attacker can determine this time, and if encryption is not also used (which is recommended, but is nothttps://patchthecve.com/cve/CVE-2021-29479.htmlhttps://patchthecve.com/cve/CVE-2021-29479.htmlWed, 17 Jun 2026 03:47:43 +0000HIGH 7.0: Ratpack is a toolkit for creating web applications. In versions prior to 1.9.0, a user supplied `X-Forwarded-Host` header can be used to perform cache poisoning of a cache fronting a Ratpack server if the cache key does not include the `X-Forwarded-Host` header as a cache key. Users are only vulnerahttps://patchthecve.com/cve/CVE-2019-10770.htmlhttps://patchthecve.com/cve/CVE-2019-10770.htmlWed, 17 Jun 2026 02:11:38 +0000MEDIUM 6.1: All versions of io.ratpack:ratpack-core from 0.9.10 inclusive and before 1.7.6 are vulnerable to Cross-site Scripting (XSS). This affects the development mode error handler when an exception message contains untrusted data. Note the production mode error handler is not vulnerable - so for this to be