diff --git a/CHANGELOG.md b/CHANGELOG.md
index b5f33a6ef..7dc3ca9cf 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -38,6 +38,7 @@ All notable changes to this project will be documented in this file.
 
 ### Changed
 
+- stackable-devel: Bump Rust toolchain version to 1.99.0 ([#1728]).
 - krb5: Bump base image ([#1721]).
 - testing-tools: Bump various tools and Python dependencies ([#1720]).
 - ubi-rust-builders: Bump protoc to `36.2` ([#1717]).
@@ -190,6 +191,7 @@ All notable changes to this project will be documented in this file.
 [#1723]: https://github.com/stackabletech/docker-images/pull/1723
 [#1725]: https://github.com/stackabletech/docker-images/pull/1725
 [#1727]: https://github.com/stackabletech/docker-images/pull/1727
+[#1728]: https://github.com/stackabletech/docker-images/pull/1728
 
 ## [26.7.0] - 2026-07-21
 
diff --git a/stackable-base/Dockerfile b/stackable-base/Dockerfile
index a9ff42ff5..03142ab3d 100644
--- a/stackable-base/Dockerfile
+++ b/stackable-base/Dockerfile
@@ -33,7 +33,7 @@ EOF
 #
 #   docker buildx imagetools inspect registry.access.redhat.com/ubi9/ubi-minimal --format '{{json .Manifest.Digest}}'
 #
-FROM registry.access.redhat.com/ubi9/ubi-minimal@sha256:5ed244b62bbf4095080144d9d35eb8fcd3d39a9801f94aadd63b9d10978a01ae AS builder
+FROM registry.access.redhat.com/ubi9/ubi-minimal@sha256:bba2b4bbf0ed15cfe7dd72a1e17ae7d2015a141f306b304e1a2785c41400e39c AS builder
 
 # intentionally unused
 ARG PRODUCT_VERSION
diff --git a/stackable-devel/Dockerfile b/stackable-devel/Dockerfile
index 52e49f3cf..6435caa82 100644
--- a/stackable-devel/Dockerfile
+++ b/stackable-devel/Dockerfile
@@ -12,7 +12,7 @@
 #
 #   docker buildx imagetools inspect registry.access.redhat.com/ubi9/ubi-minimal --format '{{json .Manifest.Digest}}'
 #
-FROM registry.access.redhat.com/ubi9/ubi-minimal@sha256:5ed244b62bbf4095080144d9d35eb8fcd3d39a9801f94aadd63b9d10978a01ae AS builder
+FROM registry.access.redhat.com/ubi9/ubi-minimal@sha256:bba2b4bbf0ed15cfe7dd72a1e17ae7d2015a141f306b304e1a2785c41400e39c AS builder
 
 # intentionally unused
 ARG PRODUCT_VERSION
@@ -45,7 +45,7 @@ COPY stackable-base/stackable/curlrc /root/.curlrc
 # Find the latest version here: https://doc.rust-lang.org/stable/releases.html
 # TODO (@NickLarsenNZ): Move the version into boil-config.toml once renovate can look there
 # renovate: datasource=github-releases packageName=rust-lang/rust
-ARG RUST_DEFAULT_TOOLCHAIN_VERSION=1.97.1
+ARG RUST_DEFAULT_TOOLCHAIN_VERSION=1.99.0
 ENV RUST_DEFAULT_TOOLCHAIN_VERSION=${RUST_DEFAULT_TOOLCHAIN_VERSION}
 # Find the latest version here: https://crates.io/crates/cargo-cyclonedx
 # renovate: datasource=crate packageName=cargo-cyclonedx