OpenSSL up to 3.6.1 DANE Client Code use after free

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.0$5k-$25k0.00

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 06/20/2026).

The vulnerability scanner Nessus provides a plugin with the ID 305682 (SUSE SLES15 Security Update : openssl-3 (SUSE-SU-2026:1213-1)), which helps to determine the existence of the flaw in a target environment.

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 databases at Tenable (305682), EUVD (EUVD-2026-19961) and CERT Bund (WID-SEC-2026-0995). Be aware that VulDB is the high quality source for vulnerability data.

Affected

  • IBM AIX
  • IBM VIOS
  • Google Container-Optimized OS
  • Debian Linux
  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • Red Hat Ansible Automation Platform
  • Ubuntu Linux
  • SUSE Linux
  • Oracle Linux
  • NetApp AFF
  • SUSE openSUSE
  • RESF Rocky Linux
  • IBM MQ
  • NetApp FAS
  • Microsoft Azure Linux
  • Open Source OpenSSL
  • NCP Secure Enterprise VPN Server

Productinfo

Type

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.0

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 305682
Nessus Name: SUSE SLES15 Security Update : openssl-3 (SUSE-SU-2026:1213-1)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: OpenSSL 1.1.1zg/3.0.20/3.3.7/3.4.5/3.5.6/3.6.2

Timelineinfo

04/07/2026 Advisory disclosed
04/07/2026 +0 days VulDB entry created
06/20/2026 +74 days VulDB entry last update

Sourcesinfo

Product: openssl.org

Advisory: openssl-library.org
Researcher: Igor Morgenstern
Status: Confirmed

CVE: CVE-2026-28387 (🔒)
GCVE (CVE): GCVE-0-2026-28387
GCVE (VulDB): GCVE-100-355903
EUVD: 🔒
CERT Bund: WID-SEC-2026-0995 - OpenSSL: Mehrere Schwachstellen

Entryinfo

Created: 04/07/2026 21:14
Updated: 06/20/2026 04:23
Changes: 04/07/2026 21:14 (53), 04/08/2026 02:32 (1), 04/09/2026 15:56 (2), 05/02/2026 03:06 (7), 06/10/2026 05:32 (1), 06/20/2026 04:23 (1)
Complete: 🔍
Cache ID: 216::103

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

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