What is CVE-2026-45028?

CVE-2026-45028 is a medium-severity vulnerability in Astro, classified under Reusing a Nonce, Key Pair in Encryption. CVSS score: 6.1/10. Published 2026-05-13.

How severe is CVE-2026-45028?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Astro

CVE-2026-45028

Astro is a web framework. Astro versions prior to 6.1.10 used AES-GCM encryption to protect the confidentiality and integrity of server island props and slots parameters, but did not bind the ciphertext to its intended component or paramet…

EPSS: 0.000 (0.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

Astro
Withastro Astro — versions < 6.1.10

Weakness classification (CWE)

References

security-advisories@github.com (Patch, x_refsource_MISC)
security-advisories@github.com (Patch, x_refsource_MISC, Issue Tracking)
security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)

Frequently asked questions

What is CVE-2026-45028?: CVE-2026-45028 is a medium-severity vulnerability in Astro, classified under Reusing a Nonce, Key Pair in Encryption. CVSS score: 6.1/10. Published 2026-05-13.
How severe is CVE-2026-45028?: Medium severity. CVSS v3 base score is 6.1 out of 10.