High 8.2Published Jan 9, 2026

CVE-2026-22026CryptoLib Unbounded Memory Allocation in KMC HTTP Response Handler Allows Resource Exhaustion

Updated under an hour ago (Oct 27, 2026, 11:20 AM ET)

Does this affect you?

It affects nasa CryptoLib. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for nasa CryptoLib

Exploited in the last 30 days

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: 8.2 HIGH (v4.0, CNA)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
Weakness (CWE): CWE-789
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Jan 13, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

nasa CryptoLib nasa:cryptolib (from the name)	before 1.4.3	CNA record
nasa cryptolib nasa:cryptolib	before 1.4.3	NVD

References

References

https://github.com/nasa/CryptoLib/security/advisories/GHSA-w9cm-q69w-34x7	x-refsource-confirm, exploit, vendor-advisory
https://github.com/nasa/CryptoLib/commit/2372efd3da1ccb226b4297222e25f41ecc84821d	x-refsource-misc, patch
https://github.com/nasa/CryptoLib/releases/tag/v1.4.3	x-refsource-misc, release-notes

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.