PatchTheCVECVE-2026-46344: liboqs is a C-language cryptographic library that provides implementations of post-quantum cryptography algori
CVE-2026-46344 is a medium-severity flaw (CVSS 5.3) affecting liboqs. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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. When the verification function is called with a correctly-sized signature buffer for the declared algorithm but a public key whose OID bytes (pk[0..3]) reference a different XMSS parameter set with a larger sig_by
Why this priority
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 5.3 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 0.3% (top 77%) |
| CISA exploited list | No |
| Weakness | CWE-125 |
| Published | 2026-05-29 |
| Last modified | 2026-07-22 |
Last updated 2026-07-22 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-46344?
liboqs: upgrade to newer than 0.15.0. Exact commands for each OS are on this page.
Is CVE-2026-46344 being exploited?
CVE-2026-46344 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-46344 affect?
CVE-2026-46344 affects liboqs. Severity is medium (CVSS 5.3). 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. Whe
How urgent is CVE-2026-46344?
Priority 29/100. Remotely exploitable, no login, no user action
Related CVEs
- CVE-2026-44518 MEDIUM 5.3 UPGRADE liboqs is a C-language cryptographic library that provides implementations of post-quantum cryptography algori