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FIX @W-19079373@ Prevent PR title injection in validate-pr workflow #2077

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Merged
nikhil-mittal-165 merged 1 commit into from
Aug 11, 2026
+13 −2
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FIX @W-19079373@ Prevent PR title injection in validate-pr workflow #2077

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15 changes: 13 additions & 2 deletions .github/workflows/validate-pr.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -3,6 +3,11 @@ on:
pull_request:
types: [edited, opened, reopened, synchronize]

# Principle of least privilege: this workflow only needs to read repository
# contents. Restricting the token limits the blast radius of any compromised step.
permissions:
contents: read

jobs:
# We need to verify that the Pull Request's title matches the desired format.
verify_pr_title:
Expand All @@ -13,10 +18,16 @@ jobs:
- name: Checkout
uses: actions/checkout@v4
- name: Verify PR Title
# Pass untrusted values (the PR title) via the environment rather than
# direct ${{ }} interpolation, so they are treated as data and cannot
# inject shell commands.
env:
PR_TITLE: ${{ github.event.pull_request.title }}
BASE_REF: ${{ github.base_ref }}
run: |
title="${{ github.event.pull_request.title }}"
title="$PR_TITLE"
title_upper=$(echo "$title" | tr '[:lower:]' '[:upper:]')
base_ref="${{ github.base_ref }}"
base_ref="$BASE_REF"

# Define regex patterns for different types of PR titles
MAIN2DEV_REGEX="^MAIN2DEV[[:space:]]*:?[[:space:]]*@W-[[:digit:]]{8,9}@.*MERGING.+[[:digit:]]{1,2}\.[[:digit:]]{1,2}\.[[:digit:]]{1,2}.*"
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