diff --git a/CHANGELOG.md b/CHANGELOG.md
index c22a108..a671653 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,17 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/).
 
 ## [Unreleased]
 
+### Fixed
+
+- **The images no longer trust certificates from the compromised eMudhra
+  intermediate CAs** (keys disclosed 2026-10-20). Both images now require
+  `ca-certificates` `20250419+deb13u1`, Node 22.23.4, pip 26.2.2 and `certifi`
+  2026.10.19 or newer, and source installs (`pip install -e .`) require the same
+  `certifi`. curl, git, Python `requests`, pip, Node, and the bundled Trivy and
+  TruffleHog now reject those chains. Container scanners may still report
+  CVE-2026-111943 against the Trivy and TruffleHog binaries until they are
+  rebuilt on Go 1.26.10 or 1.27.3.
+
 ## [3.4.0] - 2026-09-18
 
 Findings for the hardcoded-credential rules now report where a credential is
diff --git a/Dockerfile b/Dockerfile
index 967c5f9..19d2eb6 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -56,12 +56,22 @@ COPY --from=trufflehog /usr/bin/trufflehog        /usr/local/bin/trufflehog
 COPY --from=opengrep-installer /root/.opengrep    /root/.opengrep
 
 # System deps + Node.js 22.x + Socket CLI
+# ca-certificates must be 20250419+deb13u1 or newer, which drops the roots the
+# compromised eMudhra intermediates chain to.
 RUN --mount=type=cache,target=/var/cache/apt,sharing=locked \
     --mount=type=cache,target=/var/lib/apt,sharing=locked \
     apt-get update && apt-get install -y --no-install-recommends \
-      curl git wget ca-certificates
+      curl git wget ca-certificates \
+    && dpkg --compare-versions "$(dpkg-query -W -f='${Version}' ca-certificates)" ge 20250419+deb13u1
+# pip checks certificates against its own vendored CA bundle, not the system
+# store, and the base image's pip trusts the compromised intermediates. 26.2.2
+# vendors certifi 2026.10.19. Upgrade it against the system store fixed above.
+RUN python -m pip install --no-cache-dir --cert /etc/ssl/certs/ca-certificates.crt --upgrade "pip>=26.2.2" \
+    && python -c 'import sys, pip; sys.exit(tuple(map(int, pip.__version__.split(".")[:3])) < (26, 2, 2))'
+# Node rejects the compromised eMudhra intermediates from 22.23.4.
 RUN curl -fsSL https://deb.nodesource.com/setup_22.x | bash - \
-    && apt-get install -y nodejs
+    && apt-get install -y nodejs \
+    && node -e 'const [a,b,c]=process.versions.node.split(".").map(Number); process.exit(a>22||(a===22&&(b>23||(b===23&&c>=4)))?0:1)'
 ARG SOCKET_NPM_CLI_VERSION
 RUN --mount=type=cache,target=/root/.npm \
     npm install -g "socket@${SOCKET_NPM_CLI_VERSION}"
diff --git a/Dockerfile.heavy b/Dockerfile.heavy
index 26af639..64a839c 100644
--- a/Dockerfile.heavy
+++ b/Dockerfile.heavy
@@ -30,12 +30,22 @@ COPY --from=trivy /usr/local/bin/trivy /usr/local/bin/trivy
 COPY --from=trufflehog /usr/bin/trufflehog /usr/local/bin/trufflehog
 COPY --from=opengrep-installer /root/.opengrep /root/.opengrep
 
+# ca-certificates must be 20250419+deb13u1 or newer, which drops the roots the
+# compromised eMudhra intermediates chain to.
 RUN --mount=type=cache,target=/var/cache/apt,sharing=locked \
     --mount=type=cache,target=/var/lib/apt,sharing=locked \
     apt-get update && apt-get install -y --no-install-recommends \
-      curl git wget ca-certificates
+      curl git wget ca-certificates \
+    && dpkg --compare-versions "$(dpkg-query -W -f='${Version}' ca-certificates)" ge 20250419+deb13u1
+# pip checks certificates against its own vendored CA bundle, not the system
+# store, and the base image's pip trusts the compromised intermediates. 26.2.2
+# vendors certifi 2026.10.19. Upgrade it against the system store fixed above.
+RUN python -m pip install --no-cache-dir --cert /etc/ssl/certs/ca-certificates.crt --upgrade "pip>=26.2.2" \
+    && python -c 'import sys, pip; sys.exit(tuple(map(int, pip.__version__.split(".")[:3])) < (26, 2, 2))'
+# Node rejects the compromised eMudhra intermediates from 22.23.4.
 RUN curl -fsSL https://deb.nodesource.com/setup_22.x | bash - \
-    && apt-get install -y nodejs
+    && apt-get install -y nodejs \
+    && node -e 'const [a,b,c]=process.versions.node.split(".").map(Number); process.exit(a>22||(a===22&&(b>23||(b===23&&c>=4)))?0:1)'
 ARG SOCKET_NPM_CLI_VERSION
 RUN --mount=type=cache,target=/root/.npm \
     npm install -g "socket@${SOCKET_NPM_CLI_VERSION}"
@@ -45,10 +55,12 @@ COPY pyproject.toml README.md LICENSE uv.lock /socket-basics/
 
 ENV UV_LINK_MODE=copy
 ARG SOCKET_PYTHON_CLI_VERSION
+# The Python CLI runs on the system interpreter, not the locked venv, so floor
+# certifi there too (2026.10.19 drops the compromised eMudhra roots).
 RUN --mount=type=cache,target=/root/.cache/uv \
     pip install -e . \
     && uv sync --frozen --no-dev \
-    && pip install --no-cache-dir "socketsecurity==${SOCKET_PYTHON_CLI_VERSION}"
+    && pip install --no-cache-dir "socketsecurity==${SOCKET_PYTHON_CLI_VERSION}" "certifi>=2026.10.19"
 
 COPY scripts/docker-heavy-entrypoint.sh /usr/local/bin/docker-heavy-entrypoint.sh
 RUN chmod +x /usr/local/bin/docker-heavy-entrypoint.sh
diff --git a/pyproject.toml b/pyproject.toml
index 9a6f9b7..45e63a0 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -29,7 +29,10 @@ dependencies = [
     "PyYAML>=6.0.0",
     "tomli; python_version < '3.11'",
     "socketdev>=3.5.0",
-    "jsonschema>=4.25.1"
+    "jsonschema>=4.25.1",
+    # requests' CA bundle; 2026.10.19 drops the roots behind the compromised
+    # eMudhra intermediates. Covers source installs (`pip install -e .`).
+    "certifi>=2026.10.19"
 ]
 
 [project.optional-dependencies]
diff --git a/uv.lock b/uv.lock
index a56300b..a9b5905 100644
--- a/uv.lock
+++ b/uv.lock
@@ -695,6 +695,7 @@ name = "socket-basics"
 version = "3.4.0"
 source = { editable = "." }
 dependencies = [
+    { name = "certifi" },
     { name = "jsonschema" },
     { name = "light-s3-client" },
     { name = "pyyaml" },
@@ -715,6 +716,7 @@ dev = [
 [package.metadata]
 requires-dist = [
     { name = "black", marker = "extra == 'dev'", specifier = ">=26.5.1" },
+    { name = "certifi", specifier = ">=2026.10.19" },
     { name = "flake8", marker = "extra == 'dev'", specifier = ">=5.0.0" },
     { name = "jsonschema", specifier = ">=4.25.1" },
     { name = "light-s3-client", specifier = "~=0.0.30" },