Medium severity · published Apr 24, 2026
CVE-2026-41322
@astrojs/node: Cache Poisoning due to incorrect error handling when if-match header is malformed
5.3
CVSS
0.3%
EPSS
No
On KEV
Description
@astrojs/node allows Astro to deploy your SSR site to Node targets. Prior to 10.0.5, requesting a static js/css resources from _astro path with an incorrect/malformed if-match header returns a 500 error with a one year cache lifetime instead of 412 in some cases. This has the effect that all subsequent requests to that file, regardless of if-match header will be served a 5xx error instead of the file until the cache expires. This vulnerability is fixed in 10.0.5.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 21% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AS
astro · withastro
< 10.0.5 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-41322
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-41322
github.com
https://github.com/withastro/astro/security/advisories/GHSA-c57f-mm3j-27q9
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