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compliance-trestle Vulnerable to SSRF in Remote Fetching Subsystem

Moderate severity GitHub Reviewed Published May 27, 2026 in oscal-compass/compliance-trestle • Updated May 28, 2026

Package

pip compliance-trestle (pip)

Affected versions

>= 4.0.0, < 4.0.3
< 3.12.2

Patched versions

4.0.3
3.12.2

Description

A source code audit led to the discovery of three significant security vulnerabilities in the trestle/core/remote/cache.py module.

Finding 1 (Critical): SSRF (CWE-918)
The HTTPSFetcher._do_fetch() method passes a user-supplied URL directly to requests.get() without validation. This allows an attacker to perform Server-Side Request Forgery, targeting internal services or cloud metadata endpoints (e.g., 169.254.169.254).

Per rule 4.2.11 of the CVE CNA rules Finding 1 will be addressed in this advisory, while findings 2 & 3 will be addressed in separate advisories:

Multiple Path Traversal Vulnerabilities in Remote Fetching Subsystem

Finding 2 & 3 (High/Medium): Path Traversal (CWE-22)
The caching logic for HTTPSFetcher and LocalFetcher fails to sanitize URI paths, allowing for arbitrary file reads via file:// or writing cached files outside the intended directory.

Impact: > These vulnerabilities can be chained to exfiltrate sensitive cloud credentials or compromise CI/CD environments.

Reproduction: > Please see the attached poc_ssrf_and_path_traversal.py and terminal_output.txt. 13 exploit vectors have been verified locally.

compliance-trestle_audit_2026-03-30.pdf
poc_ssrf_and_path_traversal.py
terminal_output.txt

References

@degenaro degenaro published to oscal-compass/compliance-trestle May 27, 2026
Published to the GitHub Advisory Database May 28, 2026
Reviewed May 28, 2026
Last updated May 28, 2026

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
Required
Scope
Changed
Confidentiality
High
Integrity
Low
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N

EPSS score

Exploit Prediction Scoring System (EPSS)

This score estimates the probability of this vulnerability being exploited within the next 30 days. Data provided by FIRST.
(2nd percentile)

Weaknesses

Server-Side Request Forgery (SSRF)

The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. Learn more on MITRE.

CVE ID

CVE-2026-46380

GHSA ID

GHSA-w76h-q7c6-jpjp

Source code

Credits

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