CVE-2026-28387

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.67% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 51.7% of scored records. A rank, not a probability.

NVD base score

8.1 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Modified. NVD last modified this record on 2026-07-24.

Red Hat severity

Low. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-04-07 22:00Z6 MO AGO

Last updated

2026-10-15 01:15Z14 DAYS AGO

Reserved

2026-02-27

Assigning CNA

openssl

Record state

PUBLISHED

Severity

High (CVSS 8.1)

CNA CVSS vector

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

Weaknesses

• CWE-416Use After FreeVariant
• CWE-1341Multiple Releases of Same Resource or HandleBase

Data version

5.2

Document digest

61f2eee3f1d9c83dc188c9389091a6ff9e06c37d6404dcaa2077a1f48061ed8b

• openssl-library.orgOpenSSL Advisoryhttps://openssl-library.org/news/secadv/20260407.txtvendor-advisory
• github.com3.6.2 git commithttps://github.com/openssl/openssl/commit/258a8f63b26995ba357f4326da00e19e29c6acbepatch
• github.com3.5.6 git commithttps://github.com/openssl/openssl/commit/444958deaf450aea819171f97ae69eaedede42c3patch
• github.com3.4.5 git commithttps://github.com/openssl/openssl/commit/07e727d304746edb49a98ee8f6ab00256e1f012bpatch
• github.com3.3.7 git commithttps://github.com/openssl/openssl/commit/7a4e08cee62a728d32e60b0de89e6764339df0a7patch
• github.com3.0.20 git commithttps://github.com/openssl/openssl/commit/ec03fa050b3346997ed9c5fef3d0e16ad7db8177patch
• cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-265688.html
• cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-032379.html