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Vulnerability details: VCID-mhqt-ksxk-pfb1
Vulnerability ID VCID-mhqt-ksxk-pfb1
Aliases CVE-2026-27729
GHSA-jm64-8m5q-4qh8
Summary Astro has memory exhaustion DoS due to missing request body size limit in Server Actions
Status Published
Exploitability 0.5
Weighted Severity 6.2
Risk 3.1
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-770 Allocation of Resources Without Limits or Throttling
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
epss 0.00164 https://api.first.org/data/v1/epss?cve=CVE-2026-27729
epss 0.00164 https://api.first.org/data/v1/epss?cve=CVE-2026-27729
cvssv3.1_qr MODERATE https://github.com/advisories/GHSA-jm64-8m5q-4qh8
cvssv3.1 5.9 https://github.com/withastro/astro
generic_textual MODERATE https://github.com/withastro/astro
cvssv3.1 5.9 https://github.com/withastro/astro/commit/522f880b07a4ea7d69a19b5507fb53a5ed6c87f8
generic_textual MODERATE https://github.com/withastro/astro/commit/522f880b07a4ea7d69a19b5507fb53a5ed6c87f8
cvssv3.1 5.9 https://github.com/withastro/astro/pull/15564
generic_textual MODERATE https://github.com/withastro/astro/pull/15564
cvssv3.1 5.9 https://github.com/withastro/astro/releases/tag/@astrojs/node@9.5.4
generic_textual MODERATE https://github.com/withastro/astro/releases/tag/@astrojs/node@9.5.4
cvssv3.1 5.9 https://github.com/withastro/astro/security/advisories/GHSA-jm64-8m5q-4qh8
cvssv3.1_qr MODERATE https://github.com/withastro/astro/security/advisories/GHSA-jm64-8m5q-4qh8
generic_textual MODERATE https://github.com/withastro/astro/security/advisories/GHSA-jm64-8m5q-4qh8
cvssv3.1 5.9 https://nvd.nist.gov/vuln/detail/CVE-2026-27729
generic_textual MODERATE https://nvd.nist.gov/vuln/detail/CVE-2026-27729
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2026-27729
https://github.com/withastro/astro
https://github.com/withastro/astro/commit/522f880b07a4ea7d69a19b5507fb53a5ed6c87f8
https://github.com/withastro/astro/pull/15564
https://github.com/withastro/astro/releases/tag/@astrojs/node@9.5.4
CVE-2026-27729 https://nvd.nist.gov/vuln/detail/CVE-2026-27729
GHSA-jm64-8m5q-4qh8 https://github.com/advisories/GHSA-jm64-8m5q-4qh8
GHSA-jm64-8m5q-4qh8 https://github.com/withastro/astro/security/advisories/GHSA-jm64-8m5q-4qh8
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://github.com/withastro/astro
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://github.com/withastro/astro/commit/522f880b07a4ea7d69a19b5507fb53a5ed6c87f8
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

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none
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://github.com/withastro/astro/pull/15564
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://github.com/withastro/astro/releases/tag/@astrojs/node@9.5.4
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://github.com/withastro/astro/security/advisories/GHSA-jm64-8m5q-4qh8
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2026-27729
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.37146
EPSS Score 0.00164
Published At June 11, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-11T20:38:22.666078+00:00 GHSA Importer Import https://github.com/advisories/GHSA-jm64-8m5q-4qh8 38.6.0