When you can't upgrade: open source examples of Endor Patches

Endor Patches are security backports that apply narrowly scoped CVE fixes to older Java library versions when upgrading to a current release would require disruptive API changes, rewrites, or dependency updates. Designed as compatible drop-in JAR replacements, the patches retain existing APIs and behavior, include only security-related changes, and are validated against full upstream test suites. Endor Labs has published reproducible examples for vulnerabilities in woodstox-core and Eclipse JGit through its endor-patches repository, including source diffs, CVE mappings, build and test attestations, artifact locations, checksums, and Docker/Bazel-based rebuild instructions. The repository distinguishes upstream backports from Endor-authored changes, allowing users to review modifications, reproduce builds from pinned source commits, compare generated artifacts with published checksums, and install the patched dependencies through Maven or Gradle.

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