Out-of-bounds Read in Open-quantum-safe Liboqs
CVE-2026-44518
liboqs is a C-language cryptographic library that provides implementations of post-quantum cryptography algorithms. Prior to 0.16.0, an out-of-bounds read has been identified in the XMSS and XMSS^MT stateful signature verification code. Wh…
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
EPSS: 0.001 (16.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
Affected products
- Open-quantum-safe Liboqs — versions < 0.16.0
- Openquantumsafe Liboqs
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Patch, Vendor Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC)
Frequently asked questions
- What is CVE-2026-44518?
- CVE-2026-44518 is a medium-severity vulnerability in Open-quantum-safe Liboqs, classified under Improper Input Validation. CVSS score: 5.3/10. Published 2026-05-29.
- How severe is CVE-2026-44518?
- Medium severity. CVSS v3 base score is 5.3 out of 10.