CVE-2026-33769: Astro is a web framework

Q: How do I fix CVE-2026-33769?

astro: upgrade to 5.18.1. Exact commands for each OS are on this page.

Q: Is CVE-2026-33769 being exploited?

CVE-2026-33769 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-33769 affect?

CVE-2026-33769 affects astro. Severity is medium (CVSS 5.3). 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 log

Q: How urgent is CVE-2026-33769?

Priority 35/100. Public exploit reference; Remotely exploitable, no login, no user action

This week

MEDIUM 5.3REMOTEUPGRADE

CVE-2026-33769 is a medium-severity flaw (CVSS 5.3) affecting astro. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 otherw

Why this priority

Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.3% (top 73%)
CISA exploited list	No
Weakness	CWE-20
Published	2026-03-24
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: astro

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-03-24 19:16 UTCPublished CVE record published
2026-06-17 10:38 UTCUpdated Record last modified

astro astro UPGRADE

Affected: >= 2.10.10 and < 5.18.1

Fixed in: 5.18.1

Safe to downgrade to: a release before 2.10.10

1. Check installed version

npm ls astro

2. UPGRADE to 5.18.1

npm install astro@">=5.18.1"

3. If no update is available yet, DOWNGRADE to a release before 2.10.10

npm view astro versions npm install astro@"<2.10.10"

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-33769?

astro: upgrade to 5.18.1. Exact commands for each OS are on this page.

Is CVE-2026-33769 being exploited?

CVE-2026-33769 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-33769 affect?

CVE-2026-33769 affects astro. Severity is medium (CVSS 5.3). 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 log

How urgent is CVE-2026-33769?

Priority 35/100. Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2026-41067 MEDIUM 6.1 UPGRADE Astro is a web framework
CVE-2026-45028 MEDIUM 6.1 UPGRADE Astro is a web framework
CVE-2026-54299 HIGH 7.5 UPGRADE Astro is a web framework
CVE-2026-50146 HIGH 7.1 UPGRADE Astro is a web framework
CVE-2026-54298 MEDIUM 4.2 UPGRADE Astro is a web framework

References

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