Is there a public exploit for CVE-2026-47738?

No public exploit for CVE-2026-47738 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-47738?

CVE-2026-47738 scores CVSS 5.3 (v3.1), rated medium.

What does CVE-2026-47738 affect?

CVE-2026-47738 affects open-quantum-safe liboqs.

5.3 Medium

liboqs is a C-language cryptographic library that provides implementations of post-quantum cryptography algorithms.

CVE-2026-47738

liboqs is a C-language cryptographic library that provides implementations of post-quantum cryptography algorithms. Prior to 0.16.0, OQSKEMencapsderand can dereference an uninitialized encapsderand function pointer when called on NTRU-HPS-2048-509, NTRU-HPS-2048-677, NTRU-HPS-4096-821, NTRU-HPS-4096-1229, NTRU-HRSS-701, or NTRU-HRSS-1373. The affected NTRU constructors omit the OQSKEM.encapsderand member because those schemes do not support derandomized encapsulation, OQSKEM objects are allocated without zero initialization, and the wrapper in src/kem/kem.c checks only that the OQSKEM pointer is non-null before calling through the residual heap value. An application is affected only if it instantiates one of those six NTRU KEMs and invokes OQSKEMencapsderand on it. The supported impact is a calling-process crash and denial of service. This issue is fixed in version 0.16.0.

Assessment

CVSS: 5.3 (v3.1)
Severity: Medium
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 6 November 2026
Last updated: 6 November 2026
Affected: open-quantum-safe · liboqs
Assigner: GitHub_M

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

At the source

EUVD (ENISA)

References

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