What is the CVSS score of CVE-2025-48946?

CVE-2025-48946 has a CVSS 3.1 base score of 3.7 (Low). CVSS vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N. EPSS exploitation probability: 0.1%.

Which versions of Liboqs are affected by CVE-2025-48946?

CVE-2025-48946 is a low-severity vulnerability in liboqs involving weak cryptography (CVSS 3.7).. A patch is available.

How to fix or mitigate CVE-2025-48946?

During next maintenance window: Apply vendor patches when convenient. Verify weak cryptography controls are in place.

Liboqs CVE-2025-48946

LOW

Use of a Broken or Risky Cryptographic Algorithm (CWE-327)

2025-05-30 security-advisories@github.com

Information Disclosure Liboqs

3.7

CVSS 3.1 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

3.7 LOW

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

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

CVSS VectorGitHub Advisory

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

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 18:44 vuln.today

Patch released

Mar 28, 2026 - 18:44 nvd

Patch available

CVE Published

May 30, 2025 - 20:15 nvd

LOW 3.7

DescriptionGitHub Advisory

liboqs is a C-language cryptographic library that provides implementations of post-quantum cryptography algorithms. liboqs prior to version 0.13.0 supports the HQC algorithm, an algorithm with a theoretical design flaw which leads to large numbers of malformed ciphertexts sharing the same implicit rejection value. Currently, no concrete attack on the algorithm is known. However, prospective users of HQC must take extra care when using the algorithm in protocols involving key derivation. In particular, HQC does not provide the same security guarantees as Kyber or ML-KEM. There is currently no patch for the HQC flaw available in liboqs, so HQC is disabled by default in liboqs starting from version 0.13.0. OQS will update its implementation after the HQC team releases an updated algorithm specification.

AnalysisAI

liboqs is a C-language cryptographic library that provides implementations of post-quantum cryptography algorithms. Rated low severity (CVSS 3.7), this vulnerability is remotely exploitable, no authentication required.

Technical ContextAI

This vulnerability is classified under CWE-327. liboqs is a C-language cryptographic library that provides implementations of post-quantum cryptography algorithms. liboqs prior to version 0.13.0 supports the HQC algorithm, an algorithm with a theoretical design flaw which leads to large numbers of malformed ciphertexts sharing the same implicit rejection value. Currently, no concrete attack on the algorithm is known. However, prospective users of HQC must take extra care when using the algorithm in protocols involving key derivation. In particular, HQC does not provide the same security guarantees as Kyber or ML-KEM. There is currently no patch for the HQC flaw available in liboqs, so HQC is disabled by default in liboqs starting from version 0.13.0. OQS will update its implementation after the HQC team releases an updated algorithm specification. Affected products include: Openquantumsafe Liboqs. Version information: version 0.13.0.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.