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Vulnerability record · CVE-2026-22026 · published 10 January 2026

CVE-2026-22026: Nasa cryptolib vulnerability

NNasa · Cryptolib

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.

8.2 CVSS 4.0 High EPSS 0.61% · top 52.7% CWE-789 · CWE-789
8.2CVSS 4.0 base score
0.61%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References, 2 tagged exploit
17 Jun 2026Last modified by NVD

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:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/nasa/CryptoLib/commit/2372efd3da1ccb226b4297222e25f41ecc84821d Patch
https://github.com/nasa/CryptoLib/releases/tag/v1.4.3 Release Notes
https://github.com/nasa/CryptoLib/security/advisories/GHSA-w9cm-q69w-34x7 ExploitVendor Advisory
https://github.com/nasa/CryptoLib/security/advisories/GHSA-w9cm-q69w-34x7 ExploitVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.9CVE-2025-46673Nasa cryptolib improper control of dynamically-managed code vulnerabilityNASA CryptoLib before 1.3.2 does not check whether the SA is in an operational state before use, possibly leading to a bypass of the Space Data Link …EPSS 0.50%9.9CVE-2025-46674Nasa cryptolib vulnerabilityNASA CryptoLib before 1.3.2 uses Extended Procedures that are a Work in Progress (not intended for use during flight), potentially leading to a keyst…EPSS 0.60%9.3CVE-2025-30356Nasa cryptolib out-of-bounds write vulnerabilityCryptoLib provides a software-only solution using the CCSDS Space Data Link Security Protocol - Extended Procedures (SDLS-EP) to secure communication…EPSS 0.65%9.1CVE-2025-30216Nasa cryptolib heap-based buffer overflow vulnerabilityCryptoLib provides a software-only solution using the CCSDS Space Data Link Security Protocol - Extended Procedures (SDLS-EP) to secure communication…EPSS 2.7%8.9CVE-2025-29911Nasa cryptolib heap-based buffer overflow vulnerabilityCryptoLib provides a software-only solution using the CCSDS Space Data Link Security Protocol - Extended Procedures (SDLS-EP) to secure communication…EPSS 0.74%8.9CVE-2025-29912Nasa cryptolib heap-based buffer overflow vulnerabilityCryptoLib provides a software-only solution using the CCSDS Space Data Link Security Protocol - Extended Procedures (SDLS-EP) to secure communication…EPSS 1.1%8.9CVE-2025-29913Nasa cryptolib out-of-bounds read vulnerabilityCryptoLib provides a software-only solution using the CCSDS Space Data Link Security Protocol - Extended Procedures (SDLS-EP) to secure communication…EPSS 0.72%8.9CVE-2025-29909Nasa cryptolib out-of-bounds write vulnerabilityCryptoLib provides a software-only solution using the CCSDS Space Data Link Security Protocol - Extended Procedures (SDLS-EP) to secure communication…EPSS 1.1%

Source: NIST National Vulnerability Database (record CVE-2026-22026), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.