OpenSSL up to 3.6.1 DANE Client Code use after free

Summaryinfo

A vulnerability identified as critical has been detected in OpenSSL up to 3.6.1. This impacts an unknown function of the component DANE Client Code. This manipulation causes use after free. This vulnerability appears as CVE-2026-28387. The attack may be initiated remotely. There is no available exploit. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in OpenSSL up to 3.6.1. It has been declared as critical. Affected by this vulnerability is some unknown functionality of the component DANE Client Code. The manipulation with an unknown input leads to a use after free vulnerability. The CWE definition for the vulnerability is CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. As an impact it is known to affect confidentiality, integrity, and availability.

The weakness was presented by Igor Morgenstern. It is possible to read the advisory at openssl-library.org. This vulnerability is known as CVE-2026-28387. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 04/08/2026).

Upgrading to version 1.1.1zg, 3.0.20, 3.3.7, 3.4.5, 3.5.6 or 3.6.2 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-19961). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• Network Encryption Software

Name

• OpenSSL

Version

• 1.1.1za
• 1.1.1zb
• 1.1.1zc
• 1.1.1zd
• 1.1.1ze
• 1.1.1zf
• 3.0.0
• 3.0.1
• 3.0.2
• 3.0.3
• 3.0.4
• 3.0.5
• 3.0.6
• 3.0.7
• 3.0.8
• 3.0.9
• 3.0.10
• 3.0.11
• 3.0.12
• 3.0.13
• 3.0.14
• 3.0.15
• 3.0.16
• 3.0.17
• 3.0.18
• 3.0.19
• 3.3.0
• 3.3.1
• 3.3.2
• 3.3.3
• 3.3.4
• 3.3.5
• 3.3.6
• 3.4.0
• 3.4.1
• 3.4.2
• 3.4.3
• 3.4.4
• 3.5.0
• 3.5.1
• 3.5.2
• 3.5.3
• 3.5.4
• 3.5.5
• 3.6.0
• 3.6.1

License

• open-source

Website

• Product: https://www.openssl.org/

CPE 2.3info

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CPE 2.2info

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Entryinfo

Be aware that VulDB is the high quality source for vulnerability data.

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