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CVE-2026-22026

Nasa Cryptolib vulnerability

7.5 HIGHPublic exploitEPSS 0.63%
  1. Published10 Jan 2026

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

Nasa Cryptolib< 1.4.3

Remediation

Fixed in
Nasa Cryptolib≥ 1.4.3

References

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Frequently asked

Is CVE-2026-22026 being actively exploited?

CVE-2026-22026 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.63%.

How severe is CVE-2026-22026?

CVE-2026-22026 has a CVSS 3.1 base score of 7.5, rated high. EPSS estimates a 0.63% probability of exploitation.

Which products are affected by CVE-2026-22026?

Affected products include Nasa Cryptolib.

How do I fix CVE-2026-22026?

Upgrade affected software to a fixed version, for example Nasa Cryptolib 1.4.3 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-22026 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.