CVE-2026-22026

High

Description

CryptoLib provides a software-only solution using the CCSDS Space Data Link Security Protocol - Extended Procedures (SDLS-EP) to secure communications between a spacecraft running the core Flight System (cFS) and a ground station. Prior to version 1.4.3, the libcurl write_callback function in the KMC crypto service client allows unbounded memory growth by reallocating response buffers without any size limit or overflow check. A malicious KMC server can return arbitrarily large HTTP responses, forcing the client to allocate excessive memory until the process is terminated by the OS. This issue has been patched in version 1.4.3.

SeverityHigh

CVSS7.5

Exploit probability—

ProductNasa Cryptolib

PublishedJan 10, 2026

First seenJan 10, 2026

Weakness typeCWE-789CWE-789

How to fix

Update

nasa cryptolib1.4.3 or later

Affected products

Product	Affected versions	Fixed in
nasa cryptolib	v < 1.4.3	1.4.3

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