Out-of-bounds Read Affecting nasa/CryptoLib package, versions [,1.4.3)
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-UNMANAGED-NASACRYPTOLIB-14912423
- published10 Jan 2026
- disclosed10 Jan 2026
- creditUnknown
Introduced: 10 Jan 2026
CVE-2026-21900 (opens in a new tab)How to fix?
Upgrade nasa/CryptoLib to version 1.4.3 or higher.
Overview
Affected versions of this package are vulnerable to Out-of-bounds Read via the cryptography_encrypt function when parsing JSON metadata from KMC server responses. An attacker can cause the process to read memory outside the allocated buffer by supplying short or malformed metadata strings.