Reusing a Nonce, Key Pair in Encryption Affecting astro package, versions <6.1.10
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-JS-ASTRO-16643260
- published13 May 2026
- disclosed13 May 2026
- creditPopax21
Introduced: 13 May 2026
NewCVE-2026-45028 (opens in a new tab)How to fix?
Upgrade astro to version 6.1.10 or higher.
Overview
astro is an Astro is a modern site builder with web best practices, performance, and DX front-of-mind.
Affected versions of this package are vulnerable to Reusing a Nonce, Key Pair in Encryption of server island parameters. An attacker can inject malicious HTML or script content into a component by replaying encrypted values between props and slots across different components.
Note: This is only exploitable if the application uses server islands, two different server island components share the same key name for a prop and a slot, and an attacker has full control over the value of the overlapping prop in a dynamically rendered page.