fix: [CI-23227]: bump golang.org/x/net to v0.55.0

Resolves CVE-2026-39821 (x/net/idna Improper Authentication, Critical)
and CVE-2026-33814 (x/net/http2 Infinite loop, High) surfaced in the
kaniko-acr plugin binary.

Co-authored-by: Cursor <cursoragent@cursor.com>

docker/acr/Dockerfile.linux.amd64

@@ -1,5 +1,5 @@
-FROM harnesscommunity/kaniko-executor:1.25.16-linux-amd64
+FROM harnesscommunity/kaniko-executor:1.25.15-linux-amd64
 
-ENV KANIKO_VERSION=1.25.16
+ENV KANIKO_VERSION=1.25.15
 ADD release/linux/amd64/kaniko-acr /kaniko/
 ENTRYPOINT ["/kaniko/kaniko-acr"]

docker/acr/Dockerfile.linux.arm64

@@ -1,8 +1,8 @@
-FROM harnesscommunity/kaniko-executor:1.25.16-linux-arm64
+FROM harnesscommunity/kaniko-executor:1.25.15-linux-arm64
 
 ENV HOME /root
 ENV USER root
 
-ENV KANIKO_VERSION=1.25.16
+ENV KANIKO_VERSION=1.25.15
 ADD release/linux/arm64/kaniko-acr /kaniko/
 ENTRYPOINT ["/kaniko/kaniko-acr"]

docker/docker/Dockerfile.linux.amd64

@@ -1,5 +1,5 @@
-FROM harnesscommunity/kaniko-executor:1.25.16-linux-amd64
+FROM harnesscommunity/kaniko-executor:1.25.15-linux-amd64
 
-ENV KANIKO_VERSION=1.25.16
+ENV KANIKO_VERSION=1.25.15
 ADD release/linux/amd64/kaniko-docker /kaniko/
 ENTRYPOINT ["/kaniko/kaniko-docker"]

docker/docker/Dockerfile.linux.arm64

@@ -1,8 +1,8 @@
-FROM harnesscommunity/kaniko-executor:1.25.16-linux-arm64
+FROM harnesscommunity/kaniko-executor:1.25.15-linux-arm64
 
 ENV HOME /root
 ENV USER root
 
-ENV KANIKO_VERSION=1.25.16
+ENV KANIKO_VERSION=1.25.15
 ADD release/linux/arm64/kaniko-docker /kaniko/
 ENTRYPOINT ["/kaniko/kaniko-docker"]

docker/ecr/Dockerfile.linux.amd64

@@ -1,5 +1,5 @@
-FROM harnesscommunity/kaniko-executor:1.25.16-linux-amd64
+FROM harnesscommunity/kaniko-executor:1.25.15-linux-amd64
 
-ENV KANIKO_VERSION=1.25.16
+ENV KANIKO_VERSION=1.25.15
 ADD release/linux/amd64/kaniko-ecr /kaniko/
 ENTRYPOINT ["/kaniko/kaniko-ecr"]

docker/ecr/Dockerfile.linux.arm64

@@ -1,8 +1,8 @@
-FROM harnesscommunity/kaniko-executor:1.25.16-linux-arm64
+FROM harnesscommunity/kaniko-executor:1.25.15-linux-arm64
 
 ENV HOME /root
 ENV USER root
-ENV KANIKO_VERSION=1.25.16
+ENV KANIKO_VERSION=1.25.15
 
 ADD release/linux/arm64/kaniko-ecr /kaniko/
 ENTRYPOINT ["/kaniko/kaniko-ecr"]

docker/gar/Dockerfile.linux.amd64

@@ -1,5 +1,5 @@
-FROM harnesscommunity/kaniko-executor:1.25.16-linux-amd64
+FROM harnesscommunity/kaniko-executor:1.25.15-linux-amd64
 
-ENV KANIKO_VERSION=1.25.16
+ENV KANIKO_VERSION=1.25.15
 ADD release/linux/amd64/kaniko-gar /kaniko/
 ENTRYPOINT ["/kaniko/kaniko-gar"]

docker/gar/Dockerfile.linux.arm64

@@ -1,8 +1,8 @@
-FROM harnesscommunity/kaniko-executor:1.25.16-linux-arm64
+FROM harnesscommunity/kaniko-executor:1.25.15-linux-arm64
 
 ENV HOME /root
 ENV USER root
-ENV KANIKO_VERSION=1.25.16
+ENV KANIKO_VERSION=1.25.15
 
 ADD release/linux/arm64/kaniko-gar /kaniko/
 ENTRYPOINT ["/kaniko/kaniko-gar"]

docker/gcr/Dockerfile.linux.amd64

@@ -1,5 +1,5 @@
-FROM harnesscommunity/kaniko-executor:1.25.16-linux-amd64
+FROM harnesscommunity/kaniko-executor:1.25.15-linux-amd64
 
-ENV KANIKO_VERSION=1.25.16
+ENV KANIKO_VERSION=1.25.15
 ADD release/linux/amd64/kaniko-gcr /kaniko/
 ENTRYPOINT ["/kaniko/kaniko-gcr"]

docker/gcr/Dockerfile.linux.arm64

@@ -1,8 +1,8 @@
-FROM harnesscommunity/kaniko-executor:1.25.16-linux-arm64
+FROM harnesscommunity/kaniko-executor:1.25.15-linux-arm64
 
 ENV HOME /root
 ENV USER root
-ENV KANIKO_VERSION=1.25.16
+ENV KANIKO_VERSION=1.25.15
 
 ADD release/linux/arm64/kaniko-gcr /kaniko/
 ENTRYPOINT ["/kaniko/kaniko-gcr"]