7.5

CVSS Score

3.1

-

CVSS Score

Basic Information

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CVE-2024-29896

CVE-2024-29896: Astro-Shield's Content-Security-Policy header generation in middleware could be compromised by malicious injections

Astro-Shield is a library to compute the subresource integrity hashes for your JS scripts and CSS stylesheets. When automated CSP headers generation for SSR content is enabled and the web application serves content that can be partially controlled by external users, then it is possible that the CSP headers generation feature might be "allow-listing" malicious injected resources like inlined JS, or references to external malicious scripts. The fix is available in version 1.3.0.

(GitHub Advisory)

Miggo Vulnerability Database

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CVE-2024-29896

CVE-2024-29896:

7.5

CVSS Score

3.1

-

CVSS Score

Basic Information

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Technical Details

SSVC / BOD 26-04 ↗

Exploitation NoneAutomatable YesTech Impact Partial

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Package Name	Ecosystem	Vulnerable Versions	First Patched Version
@kindspells/astro-shield	npm	= 1.2.0	1.3.0

Technical Details

Vulnerability Intelligence
Miggo AI

Root Cause Analysis

The vulnerability stems from how external resources were handled in SSR content processing. The function updateDynamicPageSriHashes() in src/core.mjs previously: 1. Automatically fetched and generated SRI hashes for ANY external resource URL found in content 2. Lacked validation against an allow-list for cross-origin resources 3. Directly modified CSP headers based on these uncontrolled hashes. The commit diff shows critical changes where external resource processing was modified to require explicit allow-listing, and removed automatic fetching of arbitrary URLs. This function was the primary entry point for processing user-influenced content into security headers, making it the core vulnerable component.

Vulnerable functions

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WAF Protection Rules

WAF Rule

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Reasoning

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