CVE-2026-27829

Astro versions 9.0.0–9.5.3 contain a bug in the image pipeline where inferSize fetches remote images at render time without validating domains, allowing SSRF by fetching from arbitrary hosts despite image.domains/image.remotePatterns restrictions. An attacker who can influence the image URL (e.g....

@chocolatey-software/astro (>=2.0.0, <=2.5.0), choco-astro (>=0.3.1, <=0.4.0) potentially affected by CVE-2026-27829 via @astrojs/node (>=9.2.2, <=9.5.2)

@astrojs/node NPM version =9.2.2, =2.0.0, =0.3.1, =0.4.0 Source cves: CVE-2026-27829 Source advisory: MEND:CVE-2026-27829...

CVE-2026-27829 Astro is vulnerable to SSRF due to missing allowlist enforcement in remote image inferSize

Astro is a web framework. In versions 9.0.0 through 9.5.3, a bug in Astro's image pipeline allows bypassing image.domains / image.remotePatterns restrictions, enabling the server to fetch content from unauthorized remote hosts. Astro provides an inferSize option that fetches remote images at rend...

Astro code issues and vulnerabilities

Astro is a content-driven website framework developed by Astro OpenSource. Versions 9.0.0 to 9.5.3 of Astro have code vulnerabilities. These vulnerabilities stem from an issue where the image pipeline bypasses domain name restrictions, potentially leading to server-side request forgeing...

CVE-2026-27829: Server-Side Request Forgery (SSRF)

Astro is a web framework. In versions 9.0.0 through 9.5.3, a bug in Astro's image pipeline allows bypassing image.domains / image.remotePatterns restrictions, enabling the server to fetch content from unauthorized remote hosts. Astro provides an inferSize option that fetches remote images at rend...

@chocolatey-software/astro (>=2.0.0, <=2.5.0), choco-astro (>=0.3.1, <=0.4.0) potentially affected by CVE-2026-27729 via @astrojs/node (>=9.2.2, <=9.5.2)

@astrojs/node NPM version =9.2.2, =2.0.0, =0.3.1, =0.4.0 Source cves: CVE-2026-27729 Source advisory: GHSA-JM64-8M5Q-4QH8...

GHSA-JM64-8M5Q-4QH8 Astro has memory exhaustion DoS due to missing request body size limit in Server Actions

Summary Astro server actions have no default request body size limit, which can lead to memory exhaustion DoS. A single large POST to a valid action endpoint can crash the server process on memory-constrained deployments. Details On-demand rendered sites built with Astro can define server actions...

@chocolatey-software/astro (>=2.0.0, <=2.5.0), choco-astro (>=0.3.1, <=0.4.0) potentially affected by CVE-2026-27729 via @astrojs/node (>=9.2.2, <=9.5.2)

@astrojs/node NPM version =9.2.2, =2.0.0, =0.3.1, =0.4.0 Source cves: CVE-2026-27729 Source advisory: OSV:GHSA-JM64-8M5Q-4QH8...

EUVD-2026-7451

Astro has memory exhaustion DoS due to missing request body size limit in Server Actions...

Astro has memory exhaustion DoS due to missing request body size limit in Server Actions

Summary Astro server actions have no default request body size limit, which can lead to memory exhaustion DoS. A single large POST to a valid action endpoint can crash the server process on memory-constrained deployments. Details On-demand rendered sites built with Astro can define server actions...

Astro is vulnerable to SSRF due to missing allowlist enforcement in remote image inferSize

Summary A bug in Astro's image pipeline allows bypassing image.domains / image.remotePatterns restrictions, enabling the server to fetch content from unauthorized remote hosts. Details Astro provides an inferSize option that fetches remote images at render time to determine their dimensions. Remo...

@chocolatey-software/astro (>=2.0.0, <=2.5.0), choco-astro (>=0.3.1, <=0.4.0) potentially affected by CVE-2026-27829 via @astrojs/node (>=9.2.2, <=9.5.2)

@astrojs/node NPM version =9.2.2, =2.0.0, =0.3.1, =0.4.0 Source cves: CVE-2026-27829 Source advisory: GHSA-CJ9F-H6R6-4CX2...

@chocolatey-software/astro (>=2.0.0, <=2.5.0), choco-astro (>=0.3.1, <=0.4.0) potentially affected by CVE-2026-27829 via @astrojs/node (>=9.2.2, <=9.5.2)

@astrojs/node NPM version =9.2.2, =2.0.0, =0.3.1, =0.4.0 Source cves: CVE-2026-27829 Source advisory: OSV:GHSA-CJ9F-H6R6-4CX2...

CVE-2026-25545

Astro is a web framework. Prior to version 9.5.4, Server-Side Rendered pages that return an error with a prerendered custom error page eg. 404.astro or 500.astro are vulnerable to SSRF. If the Host: header is changed to an attacker's server, it will be fetched on /500.html and they can redirect...

CVE-2026-27729

Astro is a web framework. In versions 9.0.0 through 9.5.3, Astro server actions have no default request body size limit, which can lead to memory exhaustion DoS. A single large POST to a valid action endpoint can crash the server process on memory-constrained deployments. On-demand rendered sites...

PT-2026-22062

Name of the Vulnerable Software and Affected Versions Astro versions 9.0.0 through 9.5.3 Description Astro’s image pipeline contains a flaw that allows bypassing image.domains / image.remotePatterns restrictions, enabling the server to fetch content from unauthorized remote hosts. The inferSize...

stnd (0.18.70) potentially affected by CVE-2026-27729 via astro (6.0.0-beta.1)

astro NPM version 6.0.0-beta.1 is affected by a known vulnerability. The following packages have a transitive dependency on astro and may be impacted: - stnd 0.18.70 Source cves: CVE-2026-27729 Source advisory: SNYK:JS-ASTRO-15338138...

@1771technologies/oneplay (>=0.0.1, <=0.0.6), @antonyfaris/prefix-node-builtins (>=1.0.0, <=1.0.1) +37 more potentially affected by CVE-2026-27729 via astro (>=5.1.9, <=5.17.2)

astro NPM version =5.1.9, =0.0.1, =1.0.0, =0.5.0, =0.0.1, =0.1.0, =0.0.1, =2.0.0, =2.18.7, =1.25.426-4, =0.6.2, =0.1.2-alpha.1, =0.0.28, =0.0.28, =0.0.40 and more Source cves: CVE-2026-27729 Source advisory: SNYK:JS-ASTRO-15338138...

CVE-2026-27729

Astro is a web framework. In versions 9.0.0 through 9.5.3, Astro server actions have no default request body size limit, which can lead to memory exhaustion DoS. A single large POST to a valid action endpoint can crash the server process on memory-constrained deployments. On-demand rendered sites...

CVE-2026-27729

Astro is a web framework. In versions 9.0.0 through 9.5.3, Astro server actions have no default request body size limit, which can lead to memory exhaustion DoS. A single large POST to a valid action endpoint can crash the server process on memory-constrained deployments. On-demand rendered sites...