GHSA-3pjw-73gf-8qr5: jackson-databind: @JsonIgnore on a Record property is bypassed with a PropertyNamingStrategy

Summary For Java Records, POJOPropertiesCollector._removeUnwantedIgnorals() records a @JsonIgnore-annotated component under its original implicit name before _renameUsing() applies the PropertyNamingStrategy. After the rename, _ignoredPropertyNames still holds only the pre-rename name, so _ignorableProps is built from the stale key. The renamed JSON key passes IgnorePropertiesUtil.shouldIgnore() and is assigned to the Record's constructor parameter, defeating the @JsonIgnore. Impact A Record using a naming strategy that relies on @JsonIgnore to keep an internal/privileged component out of deserialization can have that component set from the wire via its renamed key (e.g. a role/flag controlled by an untrusted client). Affected / Patched (verified via git tag --contains) - 2.15-2.18 line: >= 2.15.0, < 2.18.8 -> fixed in 2.18.8 (backport c7c6783) - 2.19-2.21 line: >= 2.19.0, < 2.21.4 -> fixed in 2.21.4 - 3.x line: >= 3.0.0, < 3.1.4 -> fixed in 3.1.4 (#5974, baa2cdf) Severity / CWE Maintainer: minor. Reporter: Moderate. CWE-915; related CWE-345. Credits Omkhar Arasaratnam (@omkhar) - finder.