What is CVE-2026-31790?

CVE-2026-31790 is a high-severity vulnerability in Openssl, classified under Improper Check for Unusual or Exceptional Conditions. CVSS score: 7.5/10. Published 2026-04-07.

How severe is CVE-2026-31790?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Openssl

CVE-2026-31790

Issue summary: Applications using RSASVE key encapsulation to establish a secret encryption key can send contents of an uninitialized memory buffer to a malicious peer. Impact summary: The uninitialized buffer might contain sensitive data…

EPSS: 0.000 (13.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

Affected products

Openssl — versions 3.6.0, 3.5.0, 3.4.0

Weakness classification (CWE)

CWE-754 — Improper Check for Unusual or Exceptional Conditions

References

openssl-security@openssl.org (vendor-advisory, Vendor Advisory)
openssl-security@openssl.org (Patch, patch)
openssl-security@openssl.org (Patch, patch)
openssl-security@openssl.org (Patch, patch)
openssl-security@openssl.org (Patch, patch)
openssl-security@openssl.org (Patch, patch)
0b142b55-0307-4c5a-b3c9-f314f3fb7c5e

Frequently asked questions

What is CVE-2026-31790?: CVE-2026-31790 is a high-severity vulnerability in Openssl, classified under Improper Check for Unusual or Exceptional Conditions. CVSS score: 7.5/10. Published 2026-04-07.
How severe is CVE-2026-31790?: High severity. CVSS v3 base score is 7.5 out of 10.