diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 29faf7a..af0035f 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -14,9 +14,16 @@ on:
 permissions:
   contents: read
 
+# Cancel a superseded PR run; let push and schedule runs finish so a
+# default-branch result is never dropped.
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: ${{ github.event_name == 'pull_request' }}
+
 jobs:
   docker-build:
     runs-on: ubuntu-latest
+    timeout-minutes: 20
     steps:
       - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
       - uses: docker/setup-buildx-action@f87e5991a6d7451dcb8d9637bfbc97413f497069 # v4.4.1
diff --git a/.github/workflows/cflite.yml b/.github/workflows/cflite.yml
index 65475f0..b542a8f 100644
--- a/.github/workflows/cflite.yml
+++ b/.github/workflows/cflite.yml
@@ -34,6 +34,7 @@ permissions: read-all
 jobs:
   Fuzzing:
     runs-on: ubuntu-latest
+    timeout-minutes: 20
     strategy:
       fail-fast: false
       matrix:
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 1dfadea..f2403f8 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -8,9 +8,16 @@ on:
 permissions:
   contents: read
 
+# Cancel a superseded PR run; let push and schedule runs finish so a
+# default-branch result is never dropped.
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: ${{ github.event_name == 'pull_request' }}
+
 jobs:
   test:
     runs-on: ubuntu-latest
+    timeout-minutes: 10
     steps:
       - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
       - uses: actions/setup-node@820762786026740c76f36085b0efc47a31fe5020 # v7.0.0
diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
index ad110a6..123ea37 100644
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@@ -11,10 +11,17 @@ on:
 permissions:
   contents: read
 
+# Cancel a superseded PR run; let push and schedule runs finish so a
+# default-branch result is never dropped.
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: ${{ github.event_name == 'pull_request' }}
+
 jobs:
   analyze:
     name: analyze (${{ matrix.language }})
     runs-on: ubuntu-latest
+    timeout-minutes: 20
     permissions:
       actions: read
       contents: read
diff --git a/.github/workflows/pr-triage.yml b/.github/workflows/pr-triage.yml
index 2a12b36..7732b5c 100644
--- a/.github/workflows/pr-triage.yml
+++ b/.github/workflows/pr-triage.yml
@@ -23,6 +23,7 @@ jobs:
   triage:
     name: triage
     runs-on: ubuntu-latest
+    timeout-minutes: 5
     permissions:
       contents: read
       pull-requests: write
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index f9e5a9a..7281875 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -38,6 +38,7 @@ jobs:
       id-token: write # keyless Sigstore signing (attest-build-provenance)
       attestations: write # persist the attestation in GitHub's store
     runs-on: ubuntu-latest
+    timeout-minutes: 45
     steps:
       - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with:
diff --git a/.github/workflows/scorecard.yml b/.github/workflows/scorecard.yml
index 5a7b7da..5d8b082 100644
--- a/.github/workflows/scorecard.yml
+++ b/.github/workflows/scorecard.yml
@@ -18,6 +18,7 @@ jobs:
   analysis:
     name: Scorecard analysis
     runs-on: ubuntu-latest
+    timeout-minutes: 10
     permissions:
       security-events: write # upload the SARIF to code scanning
       id-token: write # required by publish_results (OIDC attestation)