What is the CVSS score of CVE-2026-22023?

CVE-2026-22023 has a CVSS 3.1 base score of 7.5 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. EPSS exploitation probability: 0.0%.

Which versions of Cryptolib are affected by CVE-2026-22023?

CVE-2026-22023 presents notable security risk, a out-of-bounds read vulnerability rated CVSS 7.5. Exploitation could compromise the security of affected deployments.. A patch is available.

Is there a public PoC exploit available for CVE-2026-22023?

Yes, a public proof-of-concept exploit is available for CVE-2026-22023. Prioritise patching immediately. EPSS: 0.0%.

How to fix or mitigate CVE-2026-22023?

Within 7 days: Identify all affected systems and apply vendor patches promptly. Vendor patch is available.

Cryptolib CVE-2026-22023

HIGH

Out-of-bounds Read (CWE-125)

2026-01-10 security-advisories@github.com

Buffer Overflow Information Disclosure Cryptolib

7.5

CVSS 3.1 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

7.5 HIGH

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:54 vuln.today

PoC Detected

Jan 16, 2026 - 16:45 vuln.today

Public exploit code

Patch released

Jan 16, 2026 - 16:45 nvd

Patch available

CVE Published

Jan 10, 2026 - 01:16 nvd

HIGH 7.5

DescriptionGitHub Advisory

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, there is an out-of-bounds heap read vulnerability in cryptography_aead_encrypt(). This issue has been patched in version 1.4.3.

AnalysisAI

CryptoLib versions prior to 1.4.3 contain an out-of-bounds heap read in the cryptography_aead_encrypt() function, affecting spacecraft communications secured via the SDLS-EP protocol. Public exploit code exists for this vulnerability, allowing remote attackers to trigger a denial of service condition without authentication. The vulnerability impacts systems using CryptoLib for ground-to-spacecraft communications and has been patched in version 1.4.3.

Technical ContextAI

Classified as CWE-125 (Out-of-bounds Read). Affects 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, there is an out-of-bounds heap read vulnerability in cryptography_aead_encrypt(). This issue has been patched in version 1.4.3.