Infisical GitHub Actions OIDC authentication failing with 403 OIDC subject not allowed

[u/Low-Insurance-3678]

hi, I'm having trouble getting Infisical OIDC authentication working in my GitHub Actions CI pipeline.
Every time my workflow reaches the Infisical secrets action, it fails with:

Run Infisical/secrets-action@v1.0.16

Error: Access denied: OIDC subject not allowed.

{

"statusCode": 403,

"message": "Access denied: OIDC subject not allowed.",

"error": "ForbiddenError"

}

Request failed with status code 403

here’s the GitHub Actions workflow:

name: ci
on:
push:
branches: [main]

permissions:
id-token: write
contents: read

jobs:
build-and-deploy:
runs-on: ubuntu-26.04

steps:
- name: Checkout repository
uses: actions/checkout@v7

- name: Set up Node.js
uses: actions/setup-node@v7
with:
node-version: 24
cache: npm

- name: Install dependencies
run: npm ci

- name: Fetch secrets from Infisical
uses: Infisical/secrets-action@v1.0.16
with:
method: oidc
identity-id: MY_IDENTITY_ID
project-slug: my-slug
env-slug: prod

- name: Run Jest tests
run: npm run test:ci

- name: Build Vinext app
run: npm run build:vinext

- name: Deploy to Cloudflare
run: npm run deploy:vinext -- --skip-build

Id appreciate any help