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CVE-2026-33769

Astro: Remote allowlist bypass via unanchored matchPathname wildcard

Published: Mar 24, 2026Updated: Mar 26, 2026 Sources: CVE List NVDCWE-20
5.3MEDIUM
NVD MITRE
EPSS Score
0.3%
Top 75.8%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
Not available

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:LI:NA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:NIntegrity
None
A:NAvailability
None
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Weaknesses

CWE-20

Affected Products

astro
oss-project·USaka @astrojs/cloudflare, @astrojs/node
astroMixed
OSS Libraries / web-framework
withastro
oss-projectaka @astrojs/cloudflare, astro
astroLibrary
OSS Libraries / web-framework

Exploitability

Official Patch Available

Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique
Initial Access
View detailed technique mapping

References

https://github.com/withastro/astro/security/advisories/GHSA-g735-7g2w-hh3f
github.com
News mentions
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