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Find unconditional WebFlux response commit calls (CVE-2026-22732)

Recipe IDio.moderne.recipe.cve202622732.FindHttpResponseContentLengthOrFlushBufferArtifactio.moderne.recipe:rewrite-cve-2026-22732

Detects WebFlux calls that commit a ServerHttpResponse outside the lazy header-writing path: writeWith(..), writeAndFlushWith(..), setComplete(), and HttpHeaders.setContentLength(long). Under CVE-2026-22732 these patterns cause Spring Security's lazy-added security headers to be dropped. The sibling recipe FindHttpResponseContentLengthHeader covers the servlet setHeader / setIntHeader / addIntHeader case. In addition to marking Java sinks, attaches a {@code SearchResult} marker to every source file in the affected project so this recipe can be used as a declarative precondition for build-level recipes.

Single recipeProprietary

Add to your build

Get a download tokenThis recipe is Moderne licensed, so the token must belong to a Moderne customer. It replaces YOUR_DOWNLOAD_TOKEN below.

~/.gradle/gradle.properties

codeGenomeUsername=you@example.com
codeGenomeToken=YOUR_DOWNLOAD_TOKEN

build.gradle.kts

plugins {
    id("org.openrewrite.rewrite") version("latest.release")
}

rewrite {
    activeRecipe("io.moderne.recipe.cve202622732.FindHttpResponseContentLengthOrFlushBuffer")
}

repositories {
    mavenCentral()
    maven {
        url = uri("https://artifacts.codegenomeproject.org/maven")
        credentials {
            username = providers.gradleProperty("codeGenomeUsername").get()
            password = providers.gradleProperty("codeGenomeToken").get()
        }
    }
}

dependencies {
    rewrite("io.moderne.recipe:rewrite-cve-2026-22732:0.3.0")
}

Then run

./gradlew rewriteRun

Usage

This recipe has no required configuration options. You’ll need the Moderne CLI configured before running the command below.

mod run . --recipe io.moderne.recipe.cve202622732.FindHttpResponseContentLengthOrFlushBuffer

If the recipe isn’t available locally, install it with:

mod config recipes jar install io.moderne.recipe:rewrite-cve-2026-22732:RELEASE

Data tables

Structured output this recipe can produce.

  • WebFlux response direct-commit findingsRows for `ServerHttpResponse` / `HttpHeaders` calls that commit a WebFlux response outside the lazy header-writing path (writeWith, writeAndFlushWith, setComplete, HttpHeaders.setContentLength).io.moderne.recipe.cve202622732.table.HttpResponseDirectCommitTable
  • Source files that had resultsSource files that were modified by the recipe run.org.openrewrite.table.SourcesFileResults
  • Source files that had search resultsSearch results that were found during the recipe run.org.openrewrite.table.SearchResults
  • Source files that errored on a recipeThe details of all errors produced by a recipe run.org.openrewrite.table.SourcesFileErrors
  • Recipe performanceStatistics used in analyzing the performance of recipes.org.openrewrite.table.RecipeRunStats