01 Record
CVE-2026-27729
Astro has memory exhaustion DoS due to missing request body size limit in Server Actions
MediumPUBLISHEDCNA: GitHub_M
CNA base score5.9 CVSS v3.xCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
02 Description
Astro has memory exhaustion DoS due to missing request body size limit in Server Actions
03 Exploitation and scoring
- Exploitation
- Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.
- SSVC decision
- ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
- AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
- Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
- EPSS probability
- 0.48% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 41.2% of scored records. A rank, not a probability.
- NVD base score
- 7.5 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- NVD analysis status
- Analyzed. NVD last modified this record on 2026-06-17.
- Red Hat severity
- No Red Hat rating. Red Hat rates the CVEs that affect its products.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2026-02-24 00:46Z8 MO AGO
- Last updated
- 2026-02-26 14:59Z8 MO AGO
- Reserved
- 2026-02-23
- Assigning CNA
- GitHub_M
- Record state
- PUBLISHED
- Severity
- Medium (CVSS 5.9)
- CNA CVSS vector
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weaknesses
- CWE-770Allocation of Resources Without Limits or ThrottlingBase
- Data version
- 5.2
- Document digest
- a9b69abf99a91b95121d96d07f3b2dc2178b915db53844f3398944823b1a4e34
05 Affected products
VendorProductVersionsPlatforms
06 References
- github.comhttps://github.com/withastro/astro/security/advisories/GHSA-jm64-8m5q-4qh8
- github.comhttps://github.com/withastro/astro/pull/15564
- github.comhttps://github.com/withastro/astro/commit/522f880b07a4ea7d69a19b5507fb53a5ed6c87f8
- github.comhttps://github.com/withastro/astro/releases/tag/%40astrojs%2Fnode%409.5.4