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CVE-2026-33769

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Summary

Astro is a web framework. From version 2.10.10 to before version 5.18.1, this issue concerns Astro's remotePatterns path enforcement for remote URLs used by server-side fetchers such as the image optimization endpoint. The path matching logic for /* wildcards is unanchored, so a pathname that contains the allowed prefix later in the path can still match. As a result, an attacker can fetch paths outside the intended allowlisted prefix on an otherwise allowed host. This issue has been patched in v

Description

Astro is a web framework. From version 2.10.10 to before version 5.18.1, this issue concerns Astro's remotePatterns path enforcement for remote URLs used by server-side fetchers such as the image optimization endpoint. The path matching logic for /* wildcards is unanchored, so a pathname that contains the allowed prefix later in the path can still match. As a result, an attacker can fetch paths outside the intended allowlisted prefix on an otherwise allowed host. This issue has been patched in version 5.18.1.

CVSS Score
5.3
Medium
EPSS Score
0.0
Exploit Probability
Published Date
2026-03-24
First Seen: 2026-03-25
📊 Relative Risk Intelligence

This CVE is Lower Risk - more severe than 19.7% of all 329,456 vulnerabilities in our database.

#264,595
Below average severity
Severity Percentile
🎯 CISA SSVC Assessment Updated: Mar 24, 2026
🔍 Exploitation Status
Poc
Proof-of-concept available
⚙️ Automatable
NO
Requires human interaction
💥 Technical Impact
Partial
Limited system impact
SSVC data provided by CISA
Last Modified 2026-03-26
Source NVD 🔗
CVSS Vector 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CVSS Vector 4.0 CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CWE IDs (Weakness Types)
CWE-20

📦 Affected Products 1

Vendor Product Status Affected Versions
astro astro Affected
> 2.10.10 < 5.18.1

🔗 References 1

https://github.com/withastro/astro/security/advisori...
Exploit Vendor Advisory

🔗 Related CVEs 6

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CVE-2026-54299 ⚠️ high 7.5 0.2 Astro is a web framework. Prior to 6.4.6, Astro SSR apps with prerendered error pages (/404 or /500 using export const p... 2026-06-22
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CVE-2025-66202 🔶 medium 6.5 0.3 Astro is a web framework. Versions 5.15.7 and below have a double URL encoding bypass which allows any unauthenticated a... 2025-12-09
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