CVE-2025-36852
Build Cache Poisoning via Untrusted Pull Requests
Published Jun 10, 2025
CVSS 4.0 · 9.4 Critical
EPSS < 1%
KEV · Not listed
Description
A critical security vulnerability exists in remote cache extensions for common build systems utilizing bucket-based remote cache (such as those using Amazon S3, Google Cloud Storage, or similar object storage) that allows any contributor with pull request privileges to inject compromised artifacts from an untrusted environment into trusted production environments without detection.
The vulnerability exploits a fundamental design flaw in the "first-to-cache wins" principle, where artifacts built in untrusted environments (feature branches, pull requests) can poison the cache used by trusted environments (protected branches, production deployments).
This attack bypasses all traditional security measures including encryption, access controls, and checksum validation because the poisoning occurs during the artifact construction phase, before any security measures are applied.
The vulnerability exploits a fundamental design flaw in the "first-to-cache wins" principle, where artifacts built in untrusted environments (feature branches, pull requests) can poison the cache used by trusted environments (protected branches, production deployments).
This attack bypasses all traditional security measures including encryption, access controls, and checksum validation because the poisoning occurs during the artifact construction phase, before any security measures are applied.
Affected Products
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CVE record
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NVD configurations
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Red Hat packages
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OpenCVE enrichment
No data
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Niklas Portmann | Azure Based Remote Cache Plugin for Nx | affected |
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| Niklas Portmann | Minio Based Remote Cache Plugin for Nx | affected |
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| Niklas Portmann | Nx Remote Cache Utilities | affected |
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| Nx | AWS S3 Remote Cache Plugin for Nx | affected |
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| Nx | GCS Remote Cache Plugin for Nx | affected |
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| Nx | Azure Blob Remote Cache Plugin for Nx | affected |
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| Nx | Shared File System Cache Plugin for Nx | affected |
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No data.
No data.
No data available yet.
Remediation
Tracking
Advisories
| Source | ID | Title |
|---|---|---|
 EUVD |
EUVD-2025-17809 | A critical security vulnerability exists in remote cache extensions for common build systems utilizing bucket-based remote cache (such as those using Amazon S3, Google Cloud Storage, or similar object storage) that allows any contributor with pull request privileges to inject compromised artifacts from an untrusted environment into trusted production environments without detection. The vulnerability exploits a fundamental design flaw in the "first-to-cache wins" principle, where artifacts built in untrusted environments (feature branches, pull requests) can poison the cache used by trusted environments (protected branches, production deployments). This attack bypasses all traditional security measures including encryption, access controls, and checksum validation because the poisoning occurs during the artifact construction phase, before any security measures are applied. |
 Github GHSA |
GHSA-rrr2-jcr8-7q3x | @nx/azure-cache Vulnerable to Build Cache Poisoning via Untrusted Pull Requests |
Metrics
Attack Vector Network
Attack Complexity Low
Privileges Required Low
Attack Requirements None
User Interaction None
Vulnerable System Confidentiality Impact High
Vulnerable System Integrity Impact High
Vulnerable System Availability Impact High
Subsequent System Confidentiality Impact High
Subsequent System Integrity Impact High
Subsequent System Availability Impact High
No CVSS v3.1
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.260% probability within 30 days)
Exploitation none
Automatable no
Technical Impact total
References
| Link | Providers |
|---|---|
| https://nx.app/files/cve-2025-06 |
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History
Jul 12, 2025 1:45 PM
Scoring metrics updated
View changes
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
epss
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epss
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Jun 10, 2025 9:45 PM
First appearance in the feed. Affected versions updated. Affected vendors updated
View changes
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Niklas Portmann
Niklas Portmann nx-remotecache-azure Niklas Portmann nx-remotecache-custom Niklas Portmann nx-remotecache-minio Nx Nx azure-cache Nx gcs-cache Nx s3-cache Nx shared-fs-cache |
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| CPEs | cpe:2.3:a:niklas_portmann:nx-remotecache-azure:0:*:*:*:*:*:*:* cpe:2.3:a:niklas_portmann:nx-remotecache-custom:0:*:*:*:*:*:*:* cpe:2.3:a:niklas_portmann:nx-remotecache-minio:0:*:*:*:*:*:*:* cpe:2.3:a:nx:azure-cache:0:*:*:*:*:*:*:* cpe:2.3:a:nx:gcs-cache:0:*:*:*:*:*:*:* cpe:2.3:a:nx:s3-cache:0:*:*:*:*:*:*:* cpe:2.3:a:nx:shared-fs-cache:0:*:*:*:*:*:*:* |
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| Vendors & Products |
Niklas Portmann
Niklas Portmann nx-remotecache-azure Niklas Portmann nx-remotecache-custom Niklas Portmann nx-remotecache-minio Nx Nx azure-cache Nx gcs-cache Nx s3-cache Nx shared-fs-cache |
Jun 10, 2025 9:15 PM
Scoring metrics updated
View changes
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
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Jun 10, 2025 7:45 PM
Description updated. Title updated. Weaknesses updated. Added references. Scoring metrics updated
View changes
| Type | Values Removed | Values Added |
|---|---|---|
| Description | A critical security vulnerability exists in remote cache extensions for common build systems utilizing bucket-based remote cache (such as those using Amazon S3, Google Cloud Storage, or similar object storage) that allows any contributor with pull request privileges to inject compromised artifacts from an untrusted environment into trusted production environments without detection. The vulnerability exploits a fundamental design flaw in the "first-to-cache wins" principle, where artifacts built in untrusted environments (feature branches, pull requests) can poison the cache used by trusted environments (protected branches, production deployments). This attack bypasses all traditional security measures including encryption, access controls, and checksum validation because the poisoning occurs during the artifact construction phase, before any security measures are applied. | |
| Title | Build Cache Poisoning via Untrusted Pull Requests | |
| Weaknesses | CWE-829 | |
| References |
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| Metrics |
cvssV4_0
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Subscriptions
Weaknesses
